Rhitymna plana Jäger, 2003

Jäger, Peter, 2019, Review of the huntsman spider genus Rhitymna Simon, 1897 (Araneae: Sparassidae), Zootaxa 4560 (3), pp. 441-462 : 448

publication ID

https://doi.org/ 10.11646/zootaxa.4560.3.2

publication LSID

lsid:zoobank.org:pub:D522FBE2-456E-446E-9870-9533C44B6A8C

DOI

https://doi.org/10.5281/zenodo.5933337

persistent identifier

https://treatment.plazi.org/id/207C87F8-9839-DA58-CBFF-FF6FFC02F883

treatment provided by

Plazi

scientific name

Rhitymna plana Jäger, 2003
status

 

Rhitymna plana Jäger, 2003 View in CoL

Figs 12–15 View FIGURES 12–15 , 20–24 View FIGURES 16–27 , 61 View FIGURE 61

Material examined. LAOS: Luang Prabang Province: GoogleMaps 1 male ( PJ 3670 , SD 681), Phou Khoun, Tham Seua   GoogleMaps , N 19°26'35.80", E 102°26'19.10", 1226 m elevation, way to cave, shady slope, at night, by hand, P. Jäger & S. Bayer leg. 13 November 2009 (SMF). Khammouan Provinc e : 1 male ( PJ 3667 ), Boualapha , sandbank, N 17°22'37.02", E 105°53'14.96" [200 m elevation], camp, caught during daylight, H. Steiner leg. 27 February 2016, Hin Nam No Project ( SMF) GoogleMaps . Champasak Province: 1 female ( PJ 3277 , SD 691), Muang Bachieng, Tad Fane , N 15°11'3.0", E 106°7'36.9", 952 m elevation, coffee plantation, foliage, by night, by hand, P. Jäger & J. Martens leg. 17 March 2010 ( SMF) GoogleMaps ; 1 subadult female (SD 773), data as for preceding specimen, but 15 March 2010 ( SMF) GoogleMaps ; 2 females ( PJ 3665–3666 , SD 473, 464), Muang Bachieng, Tad Etu , N 15°11'37.7", E 106°6'6.3", 810 m elevation, coffee plantation with remnants of secondary forest, foliage, by night, by hand, P. Jäger et al. leg. 20.–22 November 2012 ( SMF) GoogleMaps . CAMBODIA: Kaoh Kong Province : 1 male ( PJ 3667 ), Tatai , trail to waterfall, N 11°34'27.66", 103° 5'57.84"E, 81 m elevation, by night, sweep net, light trap, S. Phauk et al. leg. 13 October 2016 ( RUPP). Kampot Province: 1 male ( PJ 3669 , SD 1305), Elephant Mountains, Bokor , road to tea farm, N 10°38'18.69", E 104° 1'43.35", 990 m elevation, disturbed primary forest, foliage, at night, by hand, P. Jäger leg. 10 July 2017 ( SMF). GoogleMaps VIETNAM: Tuyen Quang Province: 1 male ( PJ 3663 ), 1 female ( PJ 3662 ), 5 km E of Na Hang , N 22°20'59", E 105°25'36", 290 m elevation, D.V. Logunov leg. 4.–13 November 2015, G7573.40 ( MMUE). GoogleMaps Thua Tien Hue Province: 1 male ( PJ 3664 ), Bach Ma National Park [N 16°11'54.63", E 107°51'22.73"], 1400 m elevation, H. Ono leg. 6 May 2003 ( NSMT). GoogleMaps

Diagnosis. Medium-sized to large Sparassidae (body length of males: 13.1–17.2, females: 15.6–20.6). For males see differential diagnosis under R. gerdmangel spec. nov. ( Figs 12–15 View FIGURES 12–15 ). For females see Jäger (2003, 2007).

Description. Male (PJ 3663): PL 8.0, PW 8.0, AW 4.3, OL 9.2, OW 5.5. Eyes: AME 0.51, ALE 0.47, PME 0.39, PLE 0.42, AME–AME 0.22, AME–ALE 0.52, PME–PME 0.71, PME–PLE 0.90, AME–PME 0.23, ALE– PLE 0.22, clypeus height at AME 0.17, clypeus height at ALE 0.14. Cheliceral furrow with 3 promarginal, 5 retromarginal teeth, without denticles. Retromargin of chelicerae close to fang base with 7–9 bristles. Spination: Palp: 130, 0 0 1, 1111; legs: femur I–III 323, IV 321; patella I–III 101, IV 100; tibia I–III 2 226, IV 2126; metatarsus I–II 2024, III 3025, IV 3027. Leg formula: 2143. Measurements of palp and legs: Palp 8.8 (3.5, 1.6, 2.2, -, 3.5), I 51.7 (13.9, 5.1, 14.4, 14.8, 3.5), II 54.0 (14.4, 4.2, 15.3, 15.5, 3.6), III 33.6 (10.1, 3.6, 9.4, 8.1, 2.4), IV 40.9 (11.8, 3.7, 11.4, 11.0, 3.0). Metatarsi III–IV with ventro-distal spine within scopula.

Palp as in diagnosis ( Figs 12–15 View FIGURES 12–15 ). Cymbium distinctly longer than tibia. RTA with pointed tip, arising distally from tibia. Embolus arising in a 12-o’clock-position from tegulum, with swollen base, distal part curving irregularly for 180°. Dorsal tegular apophysis prolatero-distad, with slightly serrated margin apically, its tip retrolaterally with small slit and visible in resting position in ventral view behind basal embolus. Spermophor visible in retrolateral-proximal half of tegulum, additionally in the embolus.

Colouration ( Figs 20–24 View FIGURES 16–27 ). Yellowish- to reddish-brown. Prosoma dorsally reddish-brown, with dense pattern of elongates muscle sigilla, fovea longitudinal, distinct; Eye region anteriorly darker. Chelicerae deep reddishbrown. Sternum dark yellowish-brown, gnathocoxae and labium brown, distally yellowish-brown. Coxae yellowish brown. Legs yellowish brown with patellae to tarsi reddish-brown. Opisthosoma yellowish-brown with typical tuning-fork pattern dorsally, laterally with several dots, ventrally without distinct pattern.

Female. See Jäger (2003, 2007).

Variation. Males (n=6) with PL 5.5–6.3, OL 7.6–8.8; females (n=4) with PL 6.2–7.1 OL 9.3–10.5. Chelicerae with 4 posterior teeth (n= 3 male, 3 females), with 5 posterior teeth (n= 1 male). Some males with dorsal tegular apophysis distad, one male with RTA shorter, more distinctly bent and with small tooth basally ( Fig. 15 View FIGURES 12–15 ). One male with opisthosoma dorsally dark in anterior half, patches and dots fused.

Natural History. Spiders of this species were found in foliage of a coffee plantation. Egg sacs with silken plate circular, 2.5–3.0 cm in diameter and 0.5–0.6 cm flat, with ca. 135 eggs.

Distribution. Laos, Vietnam, Cambodia (new record) ( Fig. 61 View FIGURE 61 ).

SMF

Forschungsinstitut und Natur-Museum Senckenberg

RUPP

Royal University of Phnom Penh

MMUE

Museum of Manchester University

NSMT

National Science Museum (Natural History)

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Sparassidae

Genus

Rhitymna

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