Misgolas macei, Wishart & Rowell, 2008

Wishart, Graham & Rowell, David M., 2008, Trapdoor Spiders of the Genus Misgolas (Mygalomorphae: Idiopidae) from Eastern New South Wales, With Notes on Genetic Variation, Records of the Australian Museum 60 (1), pp. 45-86 : 75-76

Misgolas macei n.sp.

Figs 19A–F , 24D

Type material. HOLOTYPE?, AM KS38643 , Bulga State Forest , Grey Gums Forest Road , 2.1 km from Doyles River Road (31°33'15"S 152°14'55"E), 560 m, 4 Feb.–9 Apr. 1993, pit fall trap site 57AG, M. Gray, G. Cassis.

Diagnosis. In male: medium sized dark tan spider, carapace length c. 5.77; retrodorsal surface of metatarsi IV with spines ( Fig. 19E ); venter entirely pallid ( Fig. 19F ). Palpal bulb ( Fig. 19B,C ) with broad retrolateral embolic flange with c. 8 minute folds; embolus with prolateral curve, apophysis absent. Palpal tibia and cymbium as figured ( Fig. 19A,D ), retrolateral tibial apophysis inclined downwards, length of retroventral edge of tibial excavation and distal tibial apophysis suspending continuous brush of spines; distal tibial apophysis with thickened base, straight, horizontal; Female not known.

Description

Male holotype ( Fig. 19A–F ). Size. Carapace length 5.77, width 4.48. Abdomen length 5.21, width 3.07. Colour. In alcohol carapace, chelicerae and limbs dark tan, prosoma v surfaces paler. Dark brown smudges absent on limbs. Sparse cover of prostrate pallid hairs on caput, absent on limbs. Abdomen dorsum dark brown with 5 pallid transverse chevrons. Venter entirely pallid ( Fig. 19F ). Carapace. Edge with dense fringe black bristles; few encroach onto posterior half of post foveal surface. Line of 10 long median bristles on caput arch; transverse line of 3 bristles along anterior edge of fovea; 6 bristles between PME; 7 bristles on clypeus; 7 bristles on weakly chitinous pleuron below clypeus. Fovea width 0.95, straight, edges recurved; posterior wall not pitted. Eyes. Raised on mound. Area immediately adjacent to eyes black. Anterior width 1.02, posterior width 1.00, length 0.64, width/length ratio 1.59. Line joining posterior edges of ALE bisects AME. Posterior row straight in front, recurved behind. Chelicerae. Rastellum row of 6(6) spines; few smaller spines receding along anteroental edge of chelicerae. Intercheliceral tumescence small, swollen, pallid bearing sparse cover of minute brown setae. Fang groove with 7(7) promarginal teeth and 7(5) small retromarginal/ intermediate row teeth. Labium. Bulbous, length 0.51, width 0.74. Labio-sternal suture divided centrally, broadening laterally. Maxillae c. 5(0) anteroental basally swollen setae taken to be elementary cuspules. Sternum. Length 3.36, width 2.25. Sigilla all small, round: Anterior pairs marginal, left posterior sigilla own diameter from margin, right posterior sigilla absent. Legs. Tibia I with distal bifid apophysis. Distal process with 2(2) short spines; proximal process with 3(3) longer, pointed spines.

palp I II III IV femur 2.95 5.34 4.91 4.24 5.52 patella 1.47 2.76 2.45 2.03 2.76 tibia 2.52 3.62 3.44 2.70 4.97 metatarsus — 3.62 3.25 3.44 4.85 tarsus 1.23 2.27 2.08 2.27 2.70 total 8.17 17.61 16.13 14.68 20.80

Palp ( Fig. 19A,D ). Cymbium with c. 24 long attenuate anteriorly inclined spines distributed over distal third of d surface. RTA with thickened base, inclined downwards, d and rd surfaces covered with squat pointed spines over its full length. Length of rv edge of tibial excavation to end of horizontal, non-digitate DTA, suspending continuous brush of spines. TEM absent, weak TET on pl surface of RTA. Bulb. ( Fig. 19B,C ) Broad embolic rl flange with c. 8 minute folds, margin convexly curved. Embolus gently pl curved from d aspect, narrow, apophysis absent. Scopula. Complete on tarsi I and II. Sparse distal remnants on metatarsi I and II, absent on legs III and IV. Trichobothria. Palp: tarsi 8, tibia pd 5, rd 6. Leg I: tarsi 11, metatarsi 10, tibia pd 5, rd 6. Leg II: tarsi 11, metatarsi 10, tibia pd 6, rd 6. Leg III: tarsi 12, metatarsi 11, pd 5, rd 6. Leg IV: tarsi 11, metatarsi 15, tibia pd 8, rd 6. Leg spination. Leg I: metatarsi pl 01, rv 011001; tibia rv 0111. Leg II: tarsi rl 1 subproximal (broken), 3 subdistal; metatarsi pv 0101 (both broken), rv 01 (broken) 1112 (both broken); tibia v 0111, pd 0110. Leg III: tarsi v 14; metatarsi v 02223, d 02220; tibia v 0122, pl 0110, rl 0110; patella pd 5 (2 broken). Leg IV ( Fig. 19E ): tarsi v 14; metatarsi v 9, rd 001110; tibia v 7, rd 0110. Abdomen. Dorsum covered with long dark brown bristles with underlying short setae. Venter covered with weak pallid bristles.

Etymology. The species is named in recognition of Mr Selwyn Mace, Gerringong resident and valued collector.

Distribution and natural history. ( Fig. 24D ). This spider is known only from the type locality, the Bulga State Forest, approximately 30 km ENE of the town of Comboyne, N.S.W. The burrow is unknown.

Figures

Fig. 19. Misgolas macei n.sp. A–F?, holotype AM KS38643: (A), right palp retrolateral. (B,C), right bulb: B, dorsal; C, prolateral. (D), right cymbium dorsal. (E), right tarsus/metatarsus IV retrolateral. (F), venter.

Fig. 24. A–D. Distribution of Misgolas species in the New South Wales Central Coast (eastern Australia) based on material examined (Inset [Fig. 24A] with catchment area).