Reddyanus Vachon, 1972

Kovařík, František & Šťáhlavský, František, 2019, Revision of the genus Reddyanus from Southeast Asia, with description of five new species from Cambodia, Malaysia, Thailand and Vietnam (Scorpiones: Buthidae), Euscorpius 295, pp. 1-45 : 1-43

publication ID

https://doi.org/10.5281/zenodo.6540166

DOI

https://doi.org/10.5281/zenodo.6540172

persistent identifier

https://treatment.plazi.org/id/DC014066-B84B-6D3F-FC64-3762FA62D3C2

treatment provided by

Felipe

scientific name

Reddyanus Vachon, 1972
status

sp. n.

Reddyanus Vachon, 1972

( Figures 1–226 View Figures 1–2 View Figures 3–6 View Figures 7–17 View Figures 18–36 View Figures 37–42 View Figures 43–48 View Figures 49–66 View Figures 67–70 View Figure 71 View Figures 72–75 View Figures 76–78 View Figures 79–89 View Figures 90–108 View Figures 109–110 View Figures 111–112 View Figures 113–114 View Figures 115–116 View Figures 117–123 View Figures 124–139 View Figure 140 View Figures 141–144 View Figures 145–146 View Figures 147–154 View Figures 155–171 View Figures 172–186 View Figures 187–188 View Figures 189–190 View Figure 191 View Figures 192–202 View Figures 203–214 View Figures 215–224 View Figure 225 View Figure 226 , Tables 1–4 View Table 1 )

Isometrus (Reddyanus) Vachon, 1972: 176–177 , figs. 14, 16, 18, 20; Vachon, 1982: 90–101, 108–110, figs. 47–67, 88–91; Fet & Lowe, 2000: 150–154; KovařÍk, 2003: 5–14, figs. 1–8; KovařÍk & Ojanguren, 2013: 184–193, 347–354, 357–360, figs. 1265–1367, 1384–1409.

Isometrus (Raddyanus [sic]): Tikader & Bastawade, 1983: 254–311 (in part), figs. 727–770, 841–895.

Reddyanus KovařÍk et al., 2016: 53–88 View Cited Treatment , figs. 14, 199, 201– 220, 225–236, 245–250, 254–402, 409–420, 551–554, 561–570, tables 3–5.

TYPE SPECIES. Isometrus acanthurus Pocock, 1899

DIAGNOSIS. Medium sized buthids, adults 19–75 mm. Sternum type 1, triangular in shape. Pedipalps orthobothriotaxic, type Aβ. Chelal trichobothrium db located between et and est. Three to five pairs of lateral eyes. Tibial spurs absent on all legs. Pedipalp movable finger with six rows of granules, several accessory granules and external and internal accessory granules. Pedipalp fixed finger with seven rows of granules and six external and seven internal accessory granules. Cheliceral fixed finger with a single ventral denticle. Third and fourth legs without tibial spurs. Tibia and tarsomeres of legs I– III with setae not arranged into bristle combs on dorsal surfaces. Tarsomere II of leg IV with two sparse rows of <20 spiniform setae on ventral surface. Mesosoma dorsally with one median carina. Telson with subaculear tooth pointed or rounded. Males of most species have longer metasomal segments and often also a wider pedipalp chela manus than females.

REMARKS ON KARYOTYPES. We analyzed male karyotypes of four new Reddyanus species. The choromosomes of these species ( Figs. 215–220 View Figures 215–224 ) show the typical features of the buthid scorpions such as holocentric organization, achiasmatic meiosis in males, and lower number of chromosomes (e. g. Mattos et al., 2013). The diploid sets of R. furai sp. n. holotype (2n=14) ( Figs. 215, 221 View Figures 215–224 ), R. majkusi sp. n. holotype (2n=16) ( Figs. 216, 222 View Figures 215–224 ), R. rolciki sp. n. holotype (2n=14) ( Figs. 217, 223 View Figures 215–224 ), and three R. schwotti paratypes (2n=11) ( Figs. 218–220, 224 View Figures 215–224 ) correspond to the known range for three Reddyanus species already analyzed from Sri Lanka (2n=15–17) ( KovařÍk et al., 2016). The chromosomes of R. furai sp. n., R. majkusi sp. n., and R. rolciki sp. n. gradually decrease in length ( Figs. 221–223 View Figures 215–224 ), whereas the karyotype of R. schwotti possesses one extra large and one extra short chromosomes ( Fig. 224 View Figures 215–224 , Table 4 View Table 4 ). Moreover, this species has odd number of chromosomes and very complex multivalent association (a chain of nine chromosomes) during meiosis ( Fig. 219 View Figures 215–224 ) in contrast to only observed bivalents in R. furai sp. n. ( Fig. 215 View Figures 215–224 ) and R. rolciki sp. n. ( Fig. 217 View Figures 215–224 ). The karyotype of R. schwotti probably has differentiated by the accumulation of chromosomal fusions and reciprocal translocations. The chromosomal rearrangements are frequently detected in many other buthid scorpions (e.g. Shanahan, 1989; SadÍlek et al., 2015; Mattos et al., 2018). These types of chromosomal rearrangements may also explain different numbers and lenghts of chromosomes in Reddyanus species from Sri Lanka ( KovařÍk et al., 2016).

SUBORDINATE TAXA. Genus Reddyanus was revised by KovařÍk et Ojanguren (2013) as subgenus and elevated to the genus status by KovařÍk et al. (2016). Currently, it includes 32 species that can be divided into four informal groups according to their geographic distribution:

(a) species from India, Bangladesh and China (Tibet) (9 species): R. acanthurus (Pocock, 1899) , R. assamensis (Oates, 1888), R. brachycentrus (Pocock , 1899), R. corbeti ( Tikader & Bastawade, 1983) , R. khammamensis ( KovařÍk, 2003), R. problematicus ( KovařÍk, 2003), R. rigidulus (Pocock, 1897) , R. vittatus (Pocock, 1900) , and R. tibetanus (Lourenco & Zhu, 2008) ;

(b) species from Sri Lanka (6 species): R. basilicus (Karsch, 1879) , R. besucheti ( Vachon, 1982) , R. ceylonensis KovařÍk et al., 2016 , R. jayarathnei KovařÍk et al., 2016 , R. loebli ( Vachon, 1982) , and R. ranawanai KovařÍk et al., 2016 );

(c) species from Australia, Melanesia, New Guinea, and Oceania (3 species): R. bilyi ( KovařÍk, 2003) , R. heimi ( Vachon, 1976) , and R. melanodactylus (L. Koch, 1867) ;

(d) species from Southeast Asia, which are revised here (14 species): R. deharvengi ( Lourenco & Duhem, 2010) , R. feti ( KovařÍk, 2013) , R. furai sp. n., R. hofereki sp. n., R. jendeki ( KovařÍk, 2013) , R. krasenskyi ( KovařÍk, 1998) , R. kurkai ( KovařÍk, 1997) , R. majkusi sp. n., R. navaiae ( KovařÍk, 1998) , R. neradi ( KovařÍk, 2013) , R. petrzelkai ( KovařÍk, 2003) , R. rolciki sp. n., R. schwotti sp. n., and R. zideki ( KovařÍk, 1994) .

COMMENTS. We did not include into this revision the species Isometrus (Reddyanus) hainanensis Lourenço et al., 2005 from China (Hainan Island) and I. (R.) lao Lourenço & Leguin, 2012 from Laos. I. (R.) hainanensis was based on two specimens collected in 1931. The authors stated (p. 58) that this species is closest to R. petrzelkai , from which it differs by pale coloration, and added that pigmentation can be very stable within populations of buthid species. I. (R.) lao was based on two specimens collected in 1938, and also in this case the authors argued that the difference is in “slightly darker coloration pattern” (than in I. hainanensis ) and in other non-measurable characters (p. 74). The arguments about stability of pigmentation were refuted, and both species were synonymized with R. petrzelkai (see KovařÍk & Ojanguren, 2013: 191–192). However, based on new detailed study of genus Reddyanus and distributon of its species, we now believe that this synonymization was not valid. At the same time, it is still not possible to define unambiguously the identity of these two taxa due to their loss of pigmentation and important information missing in original descriptions. For a final decision, it is necessarily to study recently collected specimens of both populations in comparison with the types.

DISTRIBUTION. From India and China (Tibet) in the west to Melanesia in the east.

Table 2. Comparative measurements of adults of Reddyanus majkusi sp. n. and R. rolciki sp. n. Abbreviations: length (L), width (W, in carapace it corresponds to posterior width), depth (D).

Reddyanus majkusi sp. n.

( Figures 72–112 View Figures 72–75 View Figures 76–78 View Figures 79–89 View Figures 90–108 View Figures 109–110 View Figures 111–112 , 197 View Figures 192–202 , 208 View Figures 203–214 , 225 View Figure 225 , Tables 2, 4 View Table 4 )

http: //zoobank. org/urn:lsid:zoobank.org:act:EFAD254 CACB2-49AA-B1E7-583C26EAB57C

TYPE LOCALITY AND TYPE REPOSITORY. Malaysia, Pahang, Tioman Island, Juara , 2°80'N 104°19'E, 45 m a. s. l.; FKCP.

TYPE MATERIAL ( FKCP). Malaysia, Pahang, Tioman Island, Juara , 2°80'N 104°19'E, 45 m a. s. l., 1♂ (holotype, No. 1559 ) GoogleMaps 1♀ (paratype), 28.VIII.2018, leg. R. Majkus; Tioman Island, Tekek env. 2°49'14.7"N 104°10'16.1"E, 1♂ (paratype, Figs. 76–78 View Figures 76–78 ), 21.X.2018, leg. A. Albert. GoogleMaps

ETYMOLOGY. The species epithet is a patronym honoring Roman Majkus, the collector of types of the new species. He is also the author of the photographs of type locality ( Figs. 111–112 View Figures 111–112 ).

DIAGNOSIS. Adult from 29 mm (male) to 36 mm (female) long. Male has slightly longer metasomal segments and telson. Pedipalps, legs and metasoma I–III yellow, with brown spots. Femur of pedipalps mostly yellow, patella mostly black. Manus of pedipalps yellow with black spots, fingers reddish black. Metasoma V black and telson reddish black. First metasomal segment bears 10 carinae, second through fourth bear eight carinae, lateral carinae on metasoma II represented only by several granules mainly in posterior part. Metasoma V bears five. Terminal tubercle on second and third metasomal segments of both sexes slightly enlarged. Telson narrower in male. Subaculear tooth large but not rounded, dorsally with 5 granules in three rows. Pectinal teeth number 12–13 in male, 12 in female.

DESCRIPTION. The adults are 29–32.60 mm (males) – 36 mm (female) long. The habitus is shown in Figs. 72–77 View Figures 72–75 View Figures 76–78 . For position and distribution of trichobothria of pedipalps see Figs. 93–96 View Figures 90–108 , and 98–99. Sexual dimorphism: adult male with slightly longer metasomal segments and narrower telson.

Coloration ( Figs. 72–77 View Figures 72–75 View Figures 76–78 , 109–110 View Figures 109–110 ). The base color is yellow with dark spots. The chelicera is yellow, strongly reticulated. The fingers of chelicerae are spotted. The carapace and mesosoma are with a pattern that forms three dark longitudinal strips. The ventral side of the mesosoma is yellowish white with several spots on strnite VII. The femur and patella of pedipalps are yellow with dark spots, femur is mostly yellow and patella mostly black. The legs are also yellow with black spots. The metasoma I–III and partly metasoma IV are yellowish or redish brown with black spots, metasoma V is black and telson is reddish brown.

Carapace and mesosoma ( Figs. 79–83 View Figures 79–89 ). The entire carapace is covered with large granules; carinae are absent. The anterior margin of the carapace is medially convex. The mesosoma bears one median carina and is strongly granulated. Tergite VII is pentacarinate. The pectinal tooth count is 12–13 in males and 12 in female. The pectine marginal tips extend to the end of the third sternite in the males and to the half of the third sternite in the female. The pectines have three marginal lamellae and 5–7 middle lamellae. The lamellae and fulcra bear numerous light setae. Sternites are smooth with two parallel furrows except sternite VII which bears four incomplete carinae and is smooth. The glabrous zone in the middle of the posterior margin of sternite V present in male in shape of triangle and reduced in female.

Metasoma and telson ( Figs. 84–85 View Figures 79–89 , 103–108 View Figures 90–108 ). The first segment bears 10 carinae. The metasoma II–IV bear eight carinae, lateral carinae on metasoma II represented only by several granules in posterior part. The fifth segment bears five carinae from which the dorsal in male could be reduced. Ventral and ventrolateral carinae are present on the telson in male, and ventral and lateral, in female. Surfaces between carinae are obviously smooth, with small, sparse granules that become more numerous on metasoma I–IV mainly in female. Terminal tubercle on second and third metasomal segments of both sexes slightly enlarged. The telson narrower in male. Subaculear tooth large but not rounded, dorsally with 4–5 granules in three rows.

Pedipalps ( Figs. 90–102 View Figures 90–108 ). The pedipalps are very sparsely hirsute. The femur bears five granulated carinae and patella bears 7 smooth reduced carinae. The chela is with four carinae granulated in both sexes more in female. The chela is sparsely granulated in both sexes. The patella dorsally and femur are densely granulated in both sexes. Movable finger with six and fixed finger with seven rows of granules, both with several accessory granules and 6 external and 5–6 internal accessory granules.

Legs ( Figs. 86–89 View Figures 79–89 ). The legs without tibial spurs. The tibia and tarsomeres of legs with setae not arranged into bristle combs on dorsal surfaces. Tarsomere II of leg IV with two sparse rows of <20 spiniform setae on ventral surface. The femur bears 3–4, and patella, 5 carinae; both femur and patella are granulated.

Measurements. See Table 2.

AFFINITIES. The described features distinguish R. majkusi sp. n. from all other species of the genus. They are recounted in the key. Morphologically closest is R. zideki . Males of these two species has not extremely elongate metasomal segments ( Figs. 192–202 View Figures 192–202 ) but differs in color pattern of pedipalp patella ( Fig. 197 View Figures 192–202 verus 202). Subaculear tooth large but not rounded, dorsally with 3 granules in two rows in R. zideki ( Fig. 214 View Figures 203–214 ) versus 5 granules in three rows in R. majkusi sp. n. ( Fig. 208 View Figures 203–214 ).

DISTRIBUTION. Malaysia (Tioman Island) ( Fig. 225 View Figure 225 ).

Reddyanus navaiae ( KovařÍk, 1998)

( Figure 225 View Figure 225 )

Isometrus (Reddyanus) navaiae KovařÍk, 1998a: 37 ; KovařÍk, 1998b: 112; Fet & Lowe, 2000: 153; KovařÍk, 2003: 10 View Cited Treatment ; KovařÍk in KovařÍk et Ojanguren, 2013: 190, figs. 1339– 1340.

TYPE LOCALITY AND TYPE REPOSITORY. Philippines, S. Mindanao, Port Banga ; ZMHB.

TYPE MATERIAL. Philippines, S. Mindanao, Port Banga , V.1915, 4 ♀ (holotype and paratypes), leg. S. Böttcher & V. Heyne, ZMHB , NMPC, FKCP; N. Mindanao, Kolambugan , I. 1905, 1♀ 1juv. (paratypes), leg. S. Böttcher & V. Heyne, ZMHB; Luzon , Banahao, 2000 m a. s. l., 25.IV.1914, 1♀ (paratype), leg. S. Böttcher & V. Heyne, ZMHB.

DIAGNOSIS. Total length of females 19–34.4 mm, male unknown. Mesosoma bears two dark bands on dorsal margins. Median band indicated by dark spots at posterior margins of segments. Posterior margins of mesosomal segments and of carapace bear eight yellow spots or a yellow longitudinal band interrupted by dark transverse bands and spots. Pedipalps and legs reddish brown, with black spots. Base coloration identical on femur and patella. Metasoma dominantly reddish brown, dark spots present chiefly on ventral surfaces of segments and on telson. First metasomal segment bears 10 carinae, second through fourth bear eight carinae. Terminal tubercle on second and third metasomal segments slightly enlarged. Subaculear tooth dorsally with 3 granules on dorsal surface in two rows. Pectinal teeth number 12–14 in females.

DISTRIBUTION. Philippines ( Fig. 225 View Figure 225 ).

Reddyanus neradi ( KovařÍk, 2013)

( Figures 198 View Figures 192–202 , 209 View Figures 203–214 , 225 View Figure 225 )

Isometrus (Reddyanus) neradi KovařÍk in KovařÍk et Ojanguren, 2013: 190–191, figs. 1348–1353.

TYPE LOCALITY AND TYPE REPOSITORY. Thailand, Namtok Phlio National Park   GoogleMaps , 12°31'50"S 102°11'03"E; FKCP.

TYPE MATERIAL. Thailand, Namtok Phlio National Park , 12°31'50"S 102°11'03"E, 2010, 1♂ (holotype), leg. L. Nerad, FKCP. GoogleMaps

DIAGNOSIS. Total length of male holotype 32 mm. Pedipalps, legs and telson yellow, with brown spots. Base coloration yellow with dark spots, identical on femur and patella. First metasomal segment with 10 carinae, second through fourth with eight carinae, fifth with five carinae. Terminal tubercle on second and third metasomal segments slightly enlarged. Subaculear tooth wide, its terminus rounded, dorsally with 5 granules on dorsal surface in three rows. Telson length/ depth ratio in male is 2.82. Pectinal teeth number 12–13.

DISTRIBUTION. Thailand ( Fig. 225 View Figure 225 ).

Reddyanus petrzelkai ( KovařÍk, 2003)

( Figures 199 View Figures 192–202 , 210 View Figures 203–214 , 225 View Figure 225 )

Isometrus vittatus: Fage, 1933: 28 ; Fage, 1936: 181; Fage, 1944: 71.

Isometrus (Reddyanus) vittatus: Vachon, 1976: 39 (in part), 42; Fet & Lowe, 2000: 153.

Isometrus (Reddyanus) vittatus: KovařÍk, 1994: 202 (in part); KovařÍk, 1995: 188 (in part); KovařÍk, 1997: 9 (in part); KovařÍk, 1998a: 37; KovařÍk, 1998b: 112 (in part).

Isometrus (Reddyanus) petrzelkai KovařÍk, 2003: 10 View Cited Treatment ; Lourenço et al., 2005: 58; KovařÍk in KovařÍk et Ojanguren, 2013: 191–192 (in part), figs. 1312–1316.

TYPE LOCALITY AND TYPE REPOSITORY. Vietnam, Dong Nai Province, 80 km NNE Ho Shi Minh City (formerly Saigon), valley Ma Da , Tri An dam; FKCP.

TYPE MATERIAL. Vietnam, Dong Nai Province, 80 km NNE Ho Shi Minh City (formerly Saigon), valley Ma Da , Tri An dam , 1♀ (allotype), 27.IV.1996, 2♂ (holotype and paratype), III.1998, leg. K. Petrželka, FKCP.

DIAGNOSIS. Total length 45–58 mm (males) and 37 mm (female). Male has longer metasomal segments and telson. Segments of pedipalps approximately same length in both sexes. Pedipalps and legs yellow with black spots. Manus of pedipalps yellow, fingers black. Metasoma yellow with spots namely in female, fifth segment darker than preceding. First metasomal segment bears 10 carinae, second through fourth bear eight carinae, metasoma V bears five carinae, which can be reduced. Terminal tubercle on second and third metasomal segments of male very slightly enlarged. Telson reddish, elongate in males, shorter in females. Subaculear tooth large, rounded, dorsally with with 5–6 granules on dorsal surface in three rows. Pectinal teeth number 13–16.

DISTRIBUTION. Vietnam ( Fig. 225 View Figure 225 ).

Reddyanus rolciki sp. n.

( Figures 113–140 View Figures 113–114 View Figures 115–116 View Figures 117–123 View Figures 124–139 View Figure 140 , 200 View Figures 192–202 , 211 View Figures 203–214 , 225 View Figure 225 , Tables 2, 4 View Table 4 )

http: //zoobank. org/urn:lsid:zoobank.org:act:1A9BC754- 86E1-4D02-8365-3FD1 E42273 View Materials B0

Isometrus (Reddyanus) petrzelkai KovařÍk in KovařÍk et Ojanguren, 2013: 191–192 (in part).

TYPE LOCALITY AND TYPE REPOSITORY. Vietnam, Bình Thuan Province, Phan Thiet   GoogleMaps , approximately 10º56'N 108º06'E; FKCP.

TYPE MATERIAL ( FKCP). Vietnam, Bình Thuan Province, Phan Thiet, approximately 10º56'N 108º06'E, III.2014, 1♂ (holotype No. 560 , maturity ecdysis 1.VIII.2014), leg. V. Fura, bred by F. KovařÍk; GoogleMaps Cambodia, Mondol Kiri Province, Sen Monorom , 12°30'N 107°12'E, 600 m a. s. l., 22.-26.I.2006, 1♂ (paratype, Figs. 115–117 View Figures 115–116 View Figures 117–123 ), leg. S. BečvÁř, R. et H. Fouqué. GoogleMaps

ETYMOLOGY. The species epithet is a patronym honoring the entomologist Jakub RolčÍk.

DIAGNOSIS. Adult males 47–50.5 mm long, female unknown. Males have elongate metasomal segments and telson. Femur and patella of pedipalps yellow without spots. Manus of pedipalps yellow with two or three black spots on external surface, fingers black. Metasoma yellow, with brown spots on ventral surfaces of metasoma I–IV and on posterior part of metasoma V. Telson reddish black. First metasomal segment bears 10 carinae, second through fourth bear eight carinae, lateral carinae on metasoma II represented only by several granules mainly in posterior part. Metasoma V bears five carinae. Terminal tubercle on second and third metasomal segments of males only very slightly enlarged. Telson elongate in males. Subaculear tooth large and rounded, dorsally with 5–6 granules in three rows. Pectinal teeth number 14–16 in males.

DESCRIPTION. The adult males are 47–50.5 mm long, female unknown. The habitus is shown in Figs. 113–116 View Figures 113–114 View Figures 115–116 and 140 View Figure 140 . For position and distribution of trichobothria of pedipalps see Figs. 125–128 View Figures 124–139 , and 130–131. Adult male with elongate and narrow metasomal segments and telson.

Coloration ( Figs. 113–116 View Figures 113–114 View Figures 115–116 , 140 View Figure 140 ). The base color is yellow with reduced spots. The chelicera is yellow to black, strongly reticulated. The fingers of chelicerae are spotted, mostly black. The carapace and mesosoma are with a pattern that forms three dark longitudinal strips. The ventral side of the mesosoma is yellowe. The femur and patella of pedipalps are yellow without dark spots. The legs are also yellow with reduced black spots, totally absent on femur. The metasoma I–IV is yellow with black spots only on ventral surfaces, metasoma V and telson are reddish brown.

Carapace and mesosoma ( Figs. 113–119 View Figures 113–114 View Figures 115–116 View Figures 117–123 ). The entire carapace is covered with large granules; carinae are absent. The anterior margin of the carapace is medially convex. The mesosoma bears one median carina and is strongly granulated. Tergite VII is pentacarinate. The pectinal tooth count is 14– 16 in males. The pectine marginal tips extend to the quorter of the fourth sternite in the males. The pectines have three marginal lamellae and 8–10 middle lamellae. The lamellae and fulcra bear numerous light setae. Sternites are smooth with two parallel furrows except sternite VII which bears four incomplete carinae and is smooth. The glabrous zone in the middle of the posterior margin of sternite V present in shape of triangle.

Metasoma and telson ( Figs. 135–137 View Figures 124–139 , 211 View Figures 203–214 ). The first segment bears 10 carinae. The metasoma II–IV bear eight carinae, lateral carinae on metasoma II represented only by several granules in posterior part. The fifth segment bears five carinae. Ventral carina is present on the telson in males. Surfaces between metasomal carinae are obviously smooth, with small, sparse granules. Terminal tubercle on the second and the third metasomal segments of male only very slightly enlarged. The telson elongate in males. Subaculear tooth large and rounded, dorsally with 5–6 granules in three rows.

Pedipalps ( Figs. 124–134 View Figures 124–139 ). The pedipalps are very sparsely hirsute. The femur bears five and patella bears 7 granulated carinae. The chela is with four carinae. The chela is finely and patella and femur are rather densely granulated. Movable finger with six and fixed finger with seven rows of granules, both with several accessory granules and 6 external and 5 internal accessory granules.

Legs ( Figs. 120–123 View Figures 117–123 , 138–139 View Figures 124–139 ). The legs without tibial spurs. The tibia and tarsomeres of legs with setae not arranged into bristle combs on dorsal surfaces. Tarsomere II of leg IV with two sparse rows of <20 spiniform setae on ventral surface. The femur bears 3–4, and patella, 5 carinae; both femur and patella are granulated.

Measurements. See Table 2 AFFINITIES. The described features distinguish R. rolciki sp. n. from all other species of the genus. They are recounted in the key. Morphologically closest species is R. petrzelkai , which differs mainly by the color pattern of pedipalp femur and patella (see Figs. 199 View Figures 192–202 versus 200).

DISTRIBUTION. Vietnam and Cambodia ( Fig. 225 View Figure 225 ).

Reddyanus schwotti sp. n.

( Figures 141–191 View Figures 141–144 View Figures 145–146 View Figures 147–154 View Figures 155–171 View Figures 172–186 View Figures 187–188 View Figures 189–190 View Figure 191 , 201 View Figures 192–202 , 213 View Figures 203–214 , 225 View Figure 225 , Tables 3–4 View Table 3 View Table 4 )

http: //zoobank. org/urn:lsid:zoobank.org:act:5B50CE19- D041-4AA5-908C-CF1D9C6395C9

Isometrus (Reddyanus) petrzelkai KovařÍk in KovařÍk et Ojanguren, 2013: 191–192 (in part).

TYPE LOCALITY AND TYPE REPOSITORY. Thailand, Sa Kaeo Province   GoogleMaps , Pang Sida   GoogleMaps , 13.593909ºN 102.122117ºE; FKCP.

TYPE MATERIAL ( FKCP). Thailand, Sa Kaeo Province, Pang Sida, 13.593909ºN 102.122117ºE, X.2014, 1♀ (paratype, Figs. 143–144 View Figures 141–144 , 188 View Figures 187–188 , Tab. 3 View Table 3 ) GoogleMaps 5 ♂ (holotype Figs. 141–142 View Figures 141–144 , 184–186, 187, 212, Tab. 3 View Table 3 , GoogleMaps and paratypes, Nos. 728, 729, 736; all males born in D. Hoferek’s care and raised to adulthood in captivity by D. Hoferek; GoogleMaps the pregnant female leg. L. Nerad; Tao Island , Hin Wong Bay , 10°06'23"N 99°50'46"E, GoogleMaps II.2012, 1♂ (paratype, Figs. 145–147 View Figures 145–146 View Figures 147–154 , 170–171 View Figures 155–171 , 181–183, Tab. 3 View Table 3 ), leg. P. Schwott; Khao Sok, 13.1048534ºN 102.1936548ºE, GoogleMaps X.2014, 1♂ 1♀ (paratypes, Figs. 148–149 View Figures 147–154 , 151–156, 166–169, 172–177, 189–190, 201, 213), leg. L. Nerad. GoogleMaps Cambodia, Kampot Province, Bokor, 10°38'20.65"N 104°00'30.62"E, 990 m a. s. l., 14.XI.2013, 1♂ (paratype, Figs. 150 View Figures 147–154 , 157–165 View Figures 155–171 , 178–180 View Figures 172–186 , 191 View Figure 191 , maturity ecdysis 20.I.2014) 3♀ 4juvs. (paratypes), leg. O. Košulič, breed F. KovařÍk. GoogleMaps

ETYMOLOGY. The species epithet is a patronym honoring Petr Schwott, the collector of a paratype of the new species.

DIAGNOSIS. Adult from 29 mm (male) to 38 mm (female) long. Male has elongate metasomal segments and telson. Pedipalps, legs and metasoma yellow to red, with reduced brown spots. Manus of pedipalps yellow with black spots, fingers reddish black. First metasomal segment bears 10 carinae, second through fourth bear eight carinae, lateral carinae on metasoma II represented only by several granules mainly in posterior part. Metasoma V bears five. Terminal tubercle on second and third metasomal segments of both sexes slightly enlarged. Subaculear tooth wide but its terminus not rounded, dorsally with 5–6 granules in three rows. Pectinal teeth number 14–15 in males, 12–14 in females.

DESCRIPTION. The adults are 29–38 mm (males) and 35–38 mm (females) long. The habitus is shown in Figs. 141–146 View Figures 141–144 View Figures 145–146 , 187–191. For position and distribution of trichobothria of pedipalps see Figs. 158–161 View Figures 155–171 , and 163–164. Sexual dimorphism: adult male with longer metasomal segments and longer and narrower telson.

Coloration ( Figs. 141–146 View Figures 141–144 View Figures 145–146 , 187–191 View Figures 187–188 View Figures 189–190 View Figure 191 ). The base color is yellow to orange with dark spots. The chelicera is yellow, strongly reticulated. The fingers of chelicerae are spotted. The carapace and mesosoma are with a pattern that forms three dark longitudinal strips. The ventral side of the mesosoma is yellow to yellowish brown with several spots on strnite VII. The femur and patella of pedipalps are yellow or orange with small reduced dark spots, both femur and patella are mostly yellow. The legs are also yellow or orange with black spots. The metasoma is yellowish or redish brown with black spots, metasoma V is darker than metasoma I–IV and telson is yellow, red to black.

Carapace and mesosoma ( Figs. 141–152 View Figures 141–144 View Figures 145–146 View Figures 147–154 ). The entire carapace is covered with large granules; carinae are absent. The anterior margin of the carapace is medially convex. The mesosoma bears one median carina and is strongly granulated. Tergite VII is pentacarinate. The pectinal tooth count is 14–15 (9 x14, 7x15) in males, 12–14 (2x12, 7x13, 1x14) in females. The pectine marginal tips extend to the third quorter of the third sternite to quorter of the forth sternite in males and to the third quorter of the third sternite in females. The pectines have three marginal lamellae and 7–8 middle lamellae. The lamellae and fulcra bear numerous light setae. Sternites are smooth with two parallel furrows except sternite VII which bears four carinae partly reduced in females. The glabrous zone in the middle of the posterior margin of sternite V present but reduced in both sexes.

Metasoma and telson ( Figs. 153–154 View Figures 147–154 , 172–186 View Figures 172–186 ). The first segment bears 10 carinae. The metasoma II–IV bear eight carinae, lateral carinae on metasoma II represented only by several granules in posterior part. The fifth segment bears five carinae. Ventral carina is present on the telson in male and ventral and lateral crinae in female. Surfaces between metasomal carinae are obviously smooth, with small, sparse granules that become more numerous on metasoma I–III mainly in female. Terminal tubercle on second and third metasomal segments of both sexes very slightly enlarged. The telson longer and narrower in male. Subaculear tooth wide but its terminus not rounded, dorsally with 5–6 granules in three rows.

Pedipalps ( Figs. 155–165 View Figures 155–171 ). The pedipalps are very sparsely hirsute. The femur bears five granulated carinae and patella bears 7 granulated carinae. The chela is with four carinae granulated in both sexes more developed in female The chela is finely and patella and femur are rather densely granulated. Movable finger with six and fixed finger with seven rows of granules, both with several accessory granules and 6 external and 5–6 internal accessory granules.

Legs ( Figs. 166–171 View Figures 155–171 ). The legs without tibial spurs. The tibia and tarsomeres of legs with setae not arranged into bristle combs on dorsal surfaces. Tarsomere II of leg IV with two sparse rows of <20 spiniform setae on ventral surface. The femur bears 3–4, and patella, 5 carinae; both femur and patella are granulated.

Measurements. See Table 3 View Table 3 .

AFFINITIES. The described features distinguish R. schwotti sp. n. from all other species of the genus. They are recounted in the key. Morphologically closest is R. petrzelkai which differs mainly by total length of male 45–58 mm (total length of R. schwotti sp. n. males is 29–38 mm), rounded terminus of subaculear tooth ( Fig. 210 View Figures 203–214 ) (subaculear tooth wide but terminus not rounded in R. schwotti sp. n., Figs. 212–213 View Figures 203–214 ), and by the color pattern of pedipalp femur and patella (see Figs. 199 View Figures 192–202 versus 201).

DISTRIBUTION. Thailand and Cambodia ( Fig. 225 View Figure 225 ).

Reddyanus zideki ( KovařÍk, 1994)

( Figures 202 View Figures 192–202 , 214 View Figures 203–214 , 225 View Figure 225 , 226 View Figure 226 )

Isometrus (Reddyanus) zideki KovařÍk, 1994: 195 ; KovařÍk, 1997: 9; KovařÍk, 1998a: 36; KovařÍk, 1998b: 112; Fet & Lowe, 2000: 153; KovařÍk, 2003: 13 View Cited Treatment ; KovařÍk in KovařÍk et Ojanguren, 2013: 193, 194, figs. 1317– 1320.

TYPE LOCALITY AND TYPE REPOSITORY. Malaysia, Cameron Highlands ; FKCP.

TYPE MATERIAL. Indonesia, Kalimantan, Nanga Pinoh, Tontag , 26.VII.1993, 1♀ (paratype), leg. J. Schneider. Malaysia, Cameron Highlands, 1992, 1♂ 1♀ (holotype and paratype), 1994, 1♂7♀ (paratypes), FKCP, NMPC.

ADDITIONAL MATERIAL EXAMINED. Malaysia, Terengganu State, Kg. Bintang env., 21.-22.II.1988, 1♀, leg. S. BečvÁř; Templer park, ca 50 km near Kuala Lumpur, IV.2002, 1♂ ( Fig. 226 View Figure 226 ) 1♀, leg. V. Šejna, FKCP .

DIAGNOSIS. Total length of males 29–33 mm, of females 25– 31 mm. Male has slightly longer metasomal segments and wider manus of pedipalp chela. Pedipalps and legs yellow, with dark spots. Base coloration identical on femur and patella. Manus of pedipalps yellow, fingers black. Metasoma yellow to reddish with brown spots, fourth and fifth segments of metasoma and telson darker. First metasomal segment bears 10 carinae, second through fourth bear eight carinae, metasoma V bears five carinae, which can be reduced. Terminal tubercle on second and third metasomal segments slightly enlarged. Subaculear tooth large but not rounded, dorsally with 3 granules in two rows. Pectinal teeth number 10–13 in both sexes.

DISTRIBUTION. Indonesia (Kalimantan), Malaysia (Malay Peninsula) ( Fig. 225 View Figure 225 ).

Key to species of Reddyanus of Southeast Asia

( Cambodia, Indonesia, Malaysia, Philippines, Thailand, and Vietnam)

1. Subaculear tooth with two symmetrical granules on dorsal surface in a row. ................… R. kurkai ( KovařÍk, 1997)

– Subaculear tooth with granules on dorsal surface in two or three rows. ..................................................................... 2

2. Subaculear tooth with 3–4 granules on dorsal surface in two rows ( Figs. 203, 206 View Figures 203–214 ). ............................................ 3

– Subaculear tooth with 5–6 granules on dorsal surface in three rows ( Figs. 204, 209 View Figures 203–214 ). .......................................... 7

3. Terminal tubercle of dorsal carina on metasoma II of male markedly enlarged ( Fig. 192 View Figures 192–202 ). .... R. feti ( KovařÍk, 2013)

– Terminal tubercle of dorsal carina on metasoma II of male not markedly enlarged ( Figs. 194, 195, 202 View Figures 192–202 ). ................ 4

4. Metasoma more elongate in females, metasoma IV length/ width ratio is 3 in females. .. R. navaiae ( KovařÍk, 1998)

– Metasoma IV length/ width ratio is 2.3–2.72 in females.. ....................................................................................... 5

5. Metasoma more elongate in males, metasoma III length/ width ratio is 3–3.44 in males ( Figs. 194–195 View Figures 192–202 ). ............ 6

– Metasoma shorter in males, metasoma III length/width ratio is 2.43 ( Fig. 202 View Figures 192–202 ). ............ R. zideki ( KovařÍk, 1994)

6. Telson in male more globular and shorter ( Fig. 206 View Figures 203–214 ). Pedipalp patella with dark spots reduced ( Fig. 195 View Figures 192–202 ). ....... ............................................... R. jendeki ( KovařÍk, 2013)

– Telson in male more narrow with aculeus more curved ( Fig. 205 View Figures 203–214 ). Pedipalp patella with dark spots more developed ( Fig. 194 View Figures 192–202 ). .......................... R. hofereki sp. n.

7. Patella of pedipalp with one large black spot covering 70% of surface ( Figs. 193, 196, 197 View Figures 192–202 ). ........................... 8

– Patella of pedipalp without a large black spot, patella and femur could be yellow or spotted ( Figs. 198–201 View Figures 192–202 ). .... 10

8. Metasoma more elongate in males, metasoma III length/ width ratio is 3.2–3.6 in males ( Figs. 193, 196 View Figures 192–202 ). ........... 9

– Metasoma shorter in males, metasoma III length/ width ratio is 2.77 in male ( Fig. 197 View Figures 192–202 ). ........... R. majkusi sp. n.

9. Telson in male more elongate ( Fig. 204 View Figures 203–214 ). Telson length/ depth ratio in male is 3.43. ....................... R. furai sp. n.

– Telson in male shorter ( Fig. 207 View Figures 203–214 ). Telson length/depth ratio in male is 2.96. ....... R. krasenskyi ( KovařÍk, 1998)

10. Second metasomal segment with 10 carinae. ................... ..................... R. deharvengi ( Lourenço & Duhem, 2010)

– Second metasomal segment with 8 carinae. ................ 11

11. Telson of males elongate, aculeus short. Telson length/ depth ratio is 3.01–3.48 ( Figs. 210–213 View Figures 203–214 ). ................... 12

– Telson of male shorter, aculeus longer. Telson length/depth ratio is 2.82 ( Fig. 209 View Figures 203–214 ). ........... R. neradi ( KovařÍk, 2013)

12. Pedipalp femur and patella yellow without dark spots ( Fig. 200 View Figures 192–202 ). ............................................... R. rolciki sp. n.

– Pedipalp femur and patella yellow with black spots ( Figs. 199 and 201 View Figures 192–202 ). ............................................................... 13

13. Total length of males 45–58 mm. Subaculear tooth wide and rounded ( Fig. 210 View Figures 203–214 ). .... R. petrzelkai ( KovařÍk, 2003)

– Total length of males 29–38 mm. Subaculear tooth wide but its terminus not rounded ( Figs. 212–213 View Figures 203–214 ). ................. .............................................................. R. schwotti sp. n.

R

Departamento de Geologia, Universidad de Chile

NMPC

National Museum Prague

V

Royal British Columbia Museum - Herbarium

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Scorpiones

Family

Buthidae

Loc

Reddyanus Vachon, 1972

Kovařík, František & Šťáhlavský, František 2019
2019
Loc

Isometrus (Reddyanus) neradi KovařÍk

KOVARIK, F. & A. A. OJANGUREN AFFILASTRO 2013: 190
2013
Loc

Isometrus (Reddyanus) petrzelkai KovařÍk

KOVARIK, F. & A. A. OJANGUREN AFFILASTRO 2013: 191
2013
Loc

Isometrus (Reddyanus) petrzelkai KovařÍk

KOVARIK, F. & A. A. OJANGUREN AFFILASTRO 2013: 191
2013
Loc

Isometrus (Reddyanus) petrzelkai KovařÍk, 2003: 10

KOVARIK, F. & A. A. OJANGUREN AFFILASTRO 2013: 191
LOURENCO 2005: 58
KOVARIK 2003: 10
2003
Loc

Isometrus (Reddyanus) navaiae KovařÍk, 1998a: 37

KOVARIK, F. & A. A. OJANGUREN AFFILASTRO 2013: 190
KOVARIK 2003: 10
FET, V. & G. LOWE 2000: 153
KOVARIK 1998: 37
KOVARIK 1998: 112
1998
Loc

Isometrus (Reddyanus) vittatus: KovařÍk, 1994: 202

KOVARIK 1998: 37
KOVARIK 1998: 112
KOVARIK 1997: 9
KOVARIK 1995: 188
KOVARIK 1994: 202
1994
Loc

Isometrus (Reddyanus) zideki KovařÍk, 1994: 195

KOVARIK, F. & A. A. OJANGUREN AFFILASTRO 2013: 193
KOVARIK 2003: 13
FET, V. & G. LOWE 2000: 153
KOVARIK 1998: 36
KOVARIK 1998: 112
KOVARIK 1997: 9
KOVARIK 1994: 195
1994
Loc

Isometrus

TIKADER, B. K. & D. B. BASTAWADE 1983: 254
1983
Loc

Isometrus (Reddyanus) vittatus:

FET, V. & G. LOWE 2000: 153
VACHON 1976: 39
1976
Loc

Isometrus (Reddyanus)

KOVARIK, F. & A. A. OJANGUREN AFFILASTRO 2013: 184
KovarIk 2003: 5 - 14
FET, V. & G. LOWE 2000: 150
Vachon 1982: 90 - 101
Vachon 1972: 177
1972
Loc

Isometrus vittatus:

FAGE 1944: 71
FAGE 1936: 181
FAGE 1933: 28
1933