Sarax yayukae Rahmadi, Harvey & Kojima, 2010

Miranda, Gustavo Silva de, Giupponi, Alessandro P. L., Prendini, Lorenzo & Scharff, Nikolaj, 2021, Systematic revision of the pantropical whip spider family Charinidae Quintero, 1986 (Arachnida, Amblypygi), European Journal of Taxonomy 772, pp. 1-409 : 208-210

Sarax yayukae Rahmadi, Harvey & Kojima, 2010

Figs 103 , 131–134 ; Table 8

Sarax yayukae Rahmadi et al., 2010: 6–10 , figs 8–15, 35–36.

Diagnosis

Based on Rahmadi et al. (2010), this species may be separated from other species of Sarax in Southeast Asia and Oceania by the following combination of characters: medium-sized with adult body length about 8.8–11.8 mm; frontal process triangular ( Fig. 131C ); tritosternum projected anteriorly ( Fig. 131B ). Female gonopod plunger-like ( Fig. 132A, C–D, G ) with bulging area on posteriormost region of genital operculum ( Fig. 132A–C ); slit sensilla laterally on genital operculum ( Fig. 132E ); deep invagination posteriomedially on genital operculum ( Fig. 132E ). Male gonopod triangular ( Fig. 133C ), with dorsal lobe and LoL1 denticulate ( Fig. 133E–F ); LoL2 fimbriate and short ( Fig. 133D ); inner surface of fistula smooth ( Fig. 133G ). Secondary sexual dimorphism, male with long, slender pedipalp whereas female pedipalp shorter and stouter; pedipalp femur with three dorsal spines and three ventral spines ( Fig. 131E–F ); pedipalp patella with four dorsal spines ( Fig. 131E ); pedipalp tarsus with three dorsal spines in adults ( Fig. 131D ); juveniles with two spines on pedipalp tarsus; rod sensilla in deep groove with five setae ( Fig. 134B, D ); tarsal organ close to basis of claw ( Fig. 134A–B, E ); leg IV tibia with 19 trichobothria and trichobothrium bc much closer to sbf than to bf; leg IV with trichobothrium bt situated near distal margin of fourth article.

Etymology

Patronym honoring Yayuk R. Suhardjono who collected the type material and for his contribution to the knowledge on cave biology in Indonesia ( Rahmadi et al. 2010).

Type material

Holotype INDONESIA • ♂; Central Kalimantan, Liang Puruk , 00°27′45.0″ N, 115°00′55.5″ E, Tumbang Topus, Murung Raya Regency, 9 Jun. 2004, C. Rahmadi, Y.R. Suhardjono and D. Silam leg., MZB Ambl. 56 [not examined].

Paratypes INDONESIA • 2 ♀♀, 1 juv.; Central Kalimantan, Liang Puruk , 00°27′45″ N, 115°00′55.5″ E; 9 Jun. 2004; C. Rahmadi, Y.R. Suhardjono and D. Silam leg.; MZB Ambl. 57–59 [not examined] • 1 ♀; same collection data as for preceding; MNHN Am. 9 [not examined] • 1 ♂; Central Kalimantan, Liang Hajuq ; 00°27′37.9″ N, 115°00′47.6″ E; 11 Jun. 2004; C. Rahmadi leg.; MZB Ambl. 93 [not examined] • 1 ♂; West Kalimantan, Gua Kelasi in buffer zone , Bukit Raya-Bukit Baka National Park, Menukung , Melawi ; 00°30′25.66″ S, 112°17′44.97″ E; 7 Aug. 2008; K.P.G. Himakova leg.; MZB Ambl. 148 [not examined] .

MALAYSIA • 3 ♀♀, 1 ♂; Sabah, Kota Kinabalu, Manukan Island ; 05°58′32.22″ N, 116°00′06.56″ E; 6 May 2006; T. Briggs leg.; under logs in forest; CASENT 9036127 [not examined] • 1 juv.; Sabah, Kota Kinabalu, Manukan Island ; 6 May 2006; H. Tu and T. Briggs leg.; jogging track on leaf litter, under logs; CASENT 9036126 [not examined] .

Additional material

MALAYSIA • 1 ♂; Sarawak, Bau Wind Cave ; 01°24′51.19″ N, 110°08′14.78″ E; 54 m a.s.l.; 8 Aug. 2013; J. Huff, A. Ang and L. Qie leg.; under limestone in dark part of cave; AMCC [ LP 12169 ] • 1 ♀, 2 juv.; Sarawak, 8 Jalan Ong Kwan Hin ; 01°32′49.1″ N, 110°20′44.6″ E; 29 m a.s.l.; Kuching; 6 Aug. 2013; J. Huff and A. Ang leg.; in backyard under rocks and debris; AMCC [ LP 12168 ] • 1 ♀, 1 ♂; Sarawak, Kuching ; Mjóhesg leg.; AMNH • 1 juv. Sarawak, Gunung Mulu National Park, Cave of the Winds ; 04°03′39.9″ N, 114°49′49.6″ E; 54 m a.s.l.; 30 Jul. 2013; S.F. Loria, J. Huff and A. Ang leg.; AMCC [ LP 12123 ] • 3 ♀♀, 3 ♂♂, 3 juv.; Sarawak, Gunung Mulu National Park, Racer Cave ; 04°03′25.9″ N, 114°49′36.8″ E; 34 m a.s.l.; 2–3 Aug. 2013; L. Qie, J. Huff, L. Kumpang, M. Peter and A. Ang leg.; AMCC [ LP 12152 ] • 1 ♀ juv.; Sarawak, Batu Song Mt. and Apoh River, Baram District ; 03°44′7.70″ N, 114°47′36.58″ E; new record; 10 Sep. 1899; Hose leg.; CUMZ I.46520 • 5 ♀♀, 5 ♂♂, 4 juv.; Sabah, Tunku Abdul Rahman National Park; Pulau Gaya ; 06°00′44.8″ N, 116°00′34.8″ E; 2 m a.s.l.; 25–28 Jul. 2013; S.F. Loria and J. Huff leg.; AMCC [ LP 12109 ] • 2 ♀♀, 2 ♂♂, 2 juv.; Sabah, Myne Resort, Kampung Bilit, Kinabatangan , near Kinabatangan River; 05°29′23.3″ N, 118°13′38.1″ E; 22–23 Jul. 2013; 20–66 m a.s.l.; S.F. Loria and J. Huff leg.; AMCC [ LP 12119 ] • 1 ♂; Sandakan , British N. Borneo; 8 Jul. 1929; K.P. Schmidt leg.; FMNH 3489490 .

Measurements

See Table 8.

Distribution

Widely distributed in Sabah and Sarawak, Malaysia.

Natural history

Large species with secondary sexual dimorphism of the pedipalp. Found inside caves and outside, under rocks and other debris on the ground.

Remarks

See Rahmadi et al. (2010) for description.

Figures

Fig. 103. Map plotting known distributions of species of Sarax Simon, 1892 in Southeast Asia and Oceania, with insets for Singapore (A), eastern Borneo (B), and western West Papua (C).

Fig. 131. Sarax yayukae Rahmadi, Harvey & Kojima, 2010 (AMCC [LP 12109]), general morphology, ♂. A. Habitus, dorsal view. B. Sternum, ventral view. C. Frontal process. D. Pedipalp tarsus, frontal view. E. Pedipalp, dorsal view. F. Pedipalp, ventral view. Scale bars: A–B, E–F = 1 mm; C = 0.1 mm; D = 1 mm.

Fig. 132. Sarax yayukae Rahmadi, Harvey & Kojima, 2010 (AMCC [LP 12109]), female gonopod and genital operculum. A. Plunger-like gonopod, dorsal view. B. Posterior margin of genital operculum, ventral view. C. Gonopods, posterior view. D. Sinistral gonopod. F. Glandular openings on margin of genital operculum. G. Genital operculum between gonopods. G. Sinistral gonopod, posterior view.

Fig. 133. Sarax yayukae Rahmadi, Harvey & Kojima, 2010 (AMCC [LP 12109]), male gonopod. A. Ventral view. B. Posterior view. C. Dorsal view. D. Sinistral side of gonopod. E. Dorsal lobe. F. Processus internus. G. Internal region of fistula without spiny projections.

Fig. 134. Sarax yayukae Rahmadi, Harvey & Kojima, 2010 (AMCC [LP 12109]), antenniform leg I, ♂. A. Apex of distal article. B. Distal segment of tarsus, lateral view. C. Apex of distal article of tarsus showing claw and tarsal organ. D. Rod sensilla and olfactory setae. E. Detail of tarsal organ.