Rhitymna plana Jager 2003
Creators: name: Jäger, Peter
Publisher: name: Zenodo
Year: 2019
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Arachnida
Araneae
Sparassidae
Rhitymna
Rhitymna plana

description: Rhitymna plana Jäger, 2003
Figs 12–15, 20–24, 61
Material examined. LAOS: Luang Prabang Province: 1 male (PJ 3670, SD 681), Phou Khoun, Tham Seua, 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). 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); 1 subadult female (SD 773), data as for preceding specimen, but 15 March 2010 (SMF); 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). 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). 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). 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).
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). 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). 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). 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). 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).
description: Published as part of Jäger, Peter, 2019, Review of the huntsman spider genus Rhitymna Simon, 1897 (Araneae: Sparassidae), pp. 441-462 in Zootaxa 4560 (3) on page 448, DOI: 10.11646/zootaxa.4560.3.2, http://zenodo.org/record/2627789