Euscorpius triantisi, Tropea & Fet & Parmakelis & Stathi, 2022

Tropea, G., Fet, V., Parmakelis, A. & Stathi, I., 2022, Two New Species Of Еuscorpius (Scorpiones, Euscorpiidae) From Skyros And Andros Islands, Greece, Zoodiversity 56 (4), pp. 307-322 : 308-315

Euscorpius triantisi sp. n. ( figs 1–12 ; tables 1–4)

urn:lsid:zoobank.org:act:F2EFA9BB-4C5C-46C3-8E90-93223CDAC60E

Euscorpius sp. Clade E3: Parmakelis et al., 2013 b: 10 (in part; Skyros);

Euscorpius cf. mylonasi: Fet et al., 2014: 12 ;

Euscorpius cf. mylonasi DNA clade E3: Fet et al., 2018: 126, figs. 1 , 5 . Type material (9}). Holotype}: Greece: Skyros Island , Acherounes , 500 m from the beach, 2 m a. s. l., 38°51' N, 24°32' E, 20 January 2002, leg. K. Triantis, 1} ( NHMC 3304 Eus 15). Paratypes. Greece: 1}, Skyros Island , Sporades (old specimen from the Zoological Museum of the University of Athens ; NHMC 17587 ); 2}, Skyros Island , Mt. Kochylas , 792 m, 38°49' N, 24°36' E, 13.05.200 2, leg. K. Triantis ( NHMC 3242 Eus 9, 3242 Eus 10); 1}, Skyros Island , Achili maquis, 20.01.200 2, leg. K. Triantis (GTC); 1}, Skyros Island , Acherounes, 500 m before the beach, 20.01.200 2, leg. K. Triantis ( NHMC 3304 Eus 14); 1}, Skyros Island , Peramata to Koumari pinewood, 52 m, 38°54' N, 24°27' E, 22.02.200 2, leg. K. Triantis (GTC); 2}, Skyros Island, Priona area, 2 km before Agios Efstratios, 160m, 38°53' N, 24°31' E, 24.01.200 2, leg. K. Triantis ( NHMC 3319 Eus 17, 3319 Eus 18).

Etymology. The species epithet honours Kostas Triantis, who collected all the specimens of the new species.

G e o g r a p h i c r a n g e. Known only from Skyros Island (see map in fig. 26 ).

Diagnosis. A small Euscorpius species, total length around 22–29 mm. Colour of adults from reddish to very light brown-reddish, with very slight reticulations or marbling on the carapace, mesosoma and metasoma, but never on chelicerae, telson and pedipalps. The number of trichobothria on the pedipalp manus ventral surface is 4 (V 1-3 +Et 1); trichobothria et and est on fixed finger are located distally to the notch of the fixed finger and dsb is located proximally to the notch. The number of ventral trichobothria on the pedipalp patella usually is Pv = 8; the number of external trichobothria on pedipalp patella usually is: eb = 4, eb a = 4, esb = 2, em = 4, est = 4, et = 6. The pectinal teeth number mostly is 7 in females (males are unknown). Chela carina V1 follows a direction toward the external of the trichobothrium Et 1, without forming a “Y” configuration. Dorsal patellar spur well developed. Femur of pedipalp slightly shorter than patella. Carapace in females usually as long as wide or slightly longer than wide. Metasomal segment in females I markedly wider than long. Metasomal carinae on segment V with serrulated and spaced granules. Ventral row of tarsus III ending with a decentralized spinule, without to form a “Y” formation. Average distance from centre of median eyes to the anterior margin of the carapace is 41.99 % of the carapace length in females. Telson usually slightly wider than high in females.

Description of the female holotype (NHMC 3304 Eus 15)

C o l o u r a t i o n. Whole colour is medium brown without marbling, with carapace and pedipalps with reddish trend and lighter legs; the telson and the chelicerae are yellow without marbling; sternites, pectines and genital operculum whitish/ivory, the sternites are very light brownish.

Carapace. With a fine and homogeneous granulation on most of surface; anterior edge straight; posterior lateral, anterior median and posterior median furrows are present; two pairs of lateral eyes and a pair of median eyes, situated distally of the middle, are present; distance from centre of median eyes to anterior margin is 41.89 % of carapace length.

Mesosoma. Tergites mostly smooth but laterally with few very little granules; sternites are smooth or very finely punctuated. Spiracles small, oval shaped and inclined about 45° downward towards outside.

Metasoma. Dorsal carinae on segments I–IV granulates; ventrolateral carinae on segment I absent, on segment II and III obsolete or smooth, on segment IV present with a few small granules, on segment V present with serrulated and spaced granules; ventromedian carina on segments I–IV absent, on segment V formed by serrulated and spaced granules placed in a row for most of the length, but in the distal part it almost becoming two lines forming a rough “Y” configuration; intercarinal spaces on segments dorsally very finely granulated, the remaining parts are mostly smooth. Dorsal furrows little marked.

Telson. Slightly wider than high. Vesicle smooth, with ventral setae of different sizes, especially around the vesicle/aculeus juncture.

Pectines. Teeth number 7/7; middle lamellae 4/4; several microsetae on marginal lamellae, middle lamellae and fulcra.

G e n i t a l o p e r c u l u m. The genital operculum is formed by two longitudinally separated subtriangular sclerites.

Sternum. Pentagonal shape, type 2; wider than long, deep posterior emargination.

Pedipalps. Coxa and trochanter with tuberculated carinae. Femur: dorsal and ventral internal carinae tuberculated; dorsal external carinae formed by tubercles slightly serrulated; ventral external carinae irregular, present mostly in the proximal 2/5; external median carinae serrulated; anterior median formed by about 8 more noticeable conical tubercles, of which three bear a macroseta each; intercarinal spaces finely granulated. Patella: dorsal and ventral internal carinae tuberculated, the latter slightly serrulated; dorsal external carinae from smooth and rounded in proximal to slightly crenulated distally; ventral external carinae crenulated; intercarinal surface ventrally and externally almost smooth, dorsally and internally finely granulated. Dorsal patellar spur (DPS) well-developed. Chela: carina D1 is distinctly strong, dark and mostly smooth; D4 formed by dark, very low and weakly marked tubercles; V1 is distinctly strong, dark and crenulated, without forming a Y” configuration; V3 is rounded, dark, with a few small and scattered granules; intercarinal internal tegument granulated, the remaining parts are mostly smooth; notch and lobe on fixed and movable fingers are barely noticeable.

T r i c h o b o t h r i a. Chela: trichobothria on the pedipalp manus ventral surface V = 3/3 (V 1-3) + Et 1 = 1/1; the trichobothrium V 4 is situated on the external surface very near to the carina V 1; the trichobothria et and est are located distally to the notch, and the trichobothrium dsb is located proximally to the notch; et-est / est-dsb ratio is about 1. Patella: ventral (Pv): 8/8; external (Pe): et = 6/6, est = 4/4, em = 4/4, esb = 2/2, eb

a

= 4/4, eb = 4 / 4. Femur: trichobothrium d on femur is proximal to i, while the trichobothrium e is distal to both, situated on dorsal external carina.

Legs. Legs with two pedal spurs; no tarsal spur; ventral row of tarsus III with a total of 10/10 spinules of increasing size from proximal to distal, ending with a decentralized spinule, without forming a “Y” configuration; 3 larger flanking pairs of tarsal setae adjacent to the ventral spinules row are presents. Tubercles present on ventral and dorsal surface of all leg femora; they are more marked and darker ventrally; on legs IV the tubercles are few and less evident.

C h e l i c e r a e. Typical of the subfamily Euscorpiinae .

T r i c h o b o t h r i a l a n d p e c t i n a l t e e t h c o u n t v a r i a t i o n. Pectinal teeth in females (n = 18): 6/6 (1), 7/7 (7), 8/7 (1); in total, 6 in 11.11 % (2), 7 in 83.33 % (15) and 8 in 5.55 % (1); mean = 6.94, SD = 0.42.

Pedipalp patella trichobothria Pv (n = 18): 7/7 (1), 8/8 (5), 8/9 (1), 9/8 (2); in total, 7 in 11.11 % (2) and 8 in 72.23 % (13) and 9 in 16.67 % (3); mean =8.05, SD = 0.54.

Pedipalp patella trichobothria Pe (n = 18): et = 6/6 (8), 7/6 (1); in total, 6 in 94.44 % (17) and 7 in 5.56 % (1); mean = 6.05, SD = 0.24; est = 4/3 (2), 4/4 (7); em = 3/4 (1), 4/4 (8); esb = 2/2 (9); eb a = 4/3 (1), 4/4 (8); eb = 4/4 (9).

Figures

Figs 1–2. Dorsal and ventral views of Euscorpius triantisi sp. n. female holotype.

Figs 3–12.Euscorpius triantisi sp. n. female holotype: 3 — carapace; 4 — external view of chela; 5 — dorsal view of pedipalp patella; 6 — ventral view of pedipalp patella; 7 — external view of pedipalp patella; 8 — dorsal view of chela; 9 — ventral view of chela; 10 — telson; 11 — ventral view of the metasomal segment V; 12 — lateral view of the metasomal segment V.

Fig. 26. Map indicating localities of the examined specimens of two new species (red squares, E. triantisi sp. n.; green circles, E. simaiakisi sp. n.; black dot marks type locality).