Misgolas mudfordae, 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 : 48-49

publication ID	https://doi.org/ 10.3853/j.0067-1975.60.2008.1495
persistent identifier	https://treatment.plazi.org/id/CE27C928-FF8B-5912-FEA7-FD6896FAF81A
treatment provided by	Felipe
scientific name	Misgolas mudfordae
status	sp. nov.

Treatment

Misgolas mudfordae View in CoL n.sp.

Figs 1A–J View Fig , 24A View Fig .

Type material. HOLOTYPE?, AM KS50037 , Bateau Bay , N.S.W., (33°22'S 151°29'E), 14 July 1997, Lyn Abra. GoogleMaps

Diagnosis. In male: medium sized brown spider, carapace length c. 7, retrodorsal surface of metatarsi IV without spines ( Fig. 1I View Fig ); venter pale with sparse even distribution of small dark brown speckles ( Fig. 1D View Fig ). Bilateral clusters of spines (c. 6–13 spines per cluster) adjacent to distal edges of metatarsi I and II ( Fig. 1E–H View Fig ). Palpal bulb ( Fig. 1B,C View Fig ) embolic flange with 5 prominent folds and c. 3–4 minor folds; embolus tip sinuous from dorsal aspect ( Fig. 1B View Fig ), appearing swollen from lateral aspect; embolus dorsal apophysis placed midway remote from swollen tip ( Fig. 1C View Fig ). Conformation of palp as figured ( Fig. 1A View Fig ). Female unknown.

Description

Male holotype ( Fig. 1A–J View Fig ). Size. Carapace length 6.96, width 5.58. Abdomen length 7.35, width 4.51. Colour. In alcohol chelicerae, carapace and limbs tan, unicolourous. Faint brown smudge ( Wishart, 1992) or “burnt decoration” (Raven & Wishart, 2005) on rl surface of patella I, absent from remaining limbs. Abdomen dorsum brown with c. 5 pallid transverse chevrons. Venter pallid with sparse even distribution of small dark brown speckles ( Fig. 1D View Fig ). Carapace. Edge fringed with black bristles which encroach onto posterior quarter of post foveal surface. Fine setae with golden sheen and small black bristles on caput. Row of 8 black bristles, and remains of 3 others, on caput arch; 8 bristles between PME; 13 bristles on clypeus. Weakly chitinous area absent from pleuron membrane below clypeus. Fovea width 1.30, straight with recurved edges; posterior wall centrally divided by shallow pitted intrusion. Eyes. Placed on mound; area immediately adjacent to eyes black. Anterior width 1.24, posterior width 1.11, length 0.67, width length ratio 1.85. Line joining posterior edges of ALE transects anterior quarter of AME. Posterior row straight in front, recurved behind. Chelicerae. Rastellum first row 5(7) spines; few smaller spines retreat along anteroental edge. Fang groove with 8(10) large promarginal teeth and 9(8) small retromarginal/ intermediate row teeth. Intercheliceral tumescence raised, pallid, with dense cover of dark prostrate setae. Labium. Bulbous, length 0.74, width 1.12. Labio-sternal suture narrow, deep, continuous. Maxillae c. 56(52) squat, spindle shaped anteroental cuspules, none surmounted by a fine hair. Sternum. Length 3.99, width 2.92. Anterior and mid pair sigilla small, round, submarginal; posterior pair larger, ovate, two diameters from margin. Legs. Tibia I with distal bifid apophysis; distal process with 2(2) short pointed spines, proximal process with 3(3) long pointed spines.

palp I II III IV femur 3.81 6.69 6.01 4.67 6.26 patella 1.78 3.32 2.89 2.33 3.01 tibia 3.56 4.97 4.18 2.76 5.59 metatarsus — 5.03 4.45 3.86 5.59 tarsus 1.78 2.95 2.76 2.49 3.00 total 10.93 22.96 20.29 16.11 23.45

Palp ( Fig. 1A View Fig ). Cymbium with c. 60 long skewer-like, cylindrical, dark brown spines inclined forward c. 45° to cymbium axis, distributed on distal half of d surface. RTA not swollen; covered with d and rd short blunt-pointed spines which become pointed and continue along rv edge of tibial excavation; c. 9 longer pointed spines suspended from short, straight DTA. TEM pallid, adjacent to RTA. TET distinct on anterior and pl sides of TEM. Bulb ( Fig. 1B,C View Fig ). Embolic rl flange with 5 prominent folds and c. 3–4 minor folds; margin gently convexly curved, distal edge folds under embolus. Embolus tip sinuous from d aspect, appearing swollen from lateral aspect. Embolic d apophysis placed midway, remote from swollen tip, terminating a small ridge. Scopula. Complete on tarsi I and II; weak and incomplete on metatarsi I and II; absent on legs III and IV. Trichobothria. Palp: tarsi 6, tibia pd 5, rd 5. Leg I: tarsi 13, metatarsi 11, tibia pd 6, rd 6. Leg II: tarsi 13, metatarsi 11, tibia pd 6, rd 6. Leg III: tarsi 9, metatarsi 9, tibia pd 6, rd 6. Leg IV: tarsi 11, metatarsi 12, tibia pd 7, rd 7. Leg spination. Leg I ( Fig. 1E,F View Fig ): tarsi bilateral rows small spines adjacent to scopula pv 13, rv19; metatarsi v 010, pl distal cluster of 13, rl distal cluster of 11; tibia v 012. Leg II ( Fig. 1G,H View Fig ): tarsi bilateral rows small spines adjacent to scopula pv 16, rv 25; metatarsi v 0121100, pl distal cluster of 9, rl distal cluster of 6; tibia v 0114. Leg III: tarsi v c. 40; metatarsi v c. 15, d 02220; tibia v 0113, pd 0110, rd 00110; patella pd 6. Leg IV: ( Fig. 1I View Fig ): tarsi v c. 44; metatarsi v c. 11; tibia v 0112. Abdomen. Misshapen. Dorsum with cover of long brown erect bristles, under story of fine hairs continuing over venter. Venter densely covered with small, prostrate brown bristles.

Remarks. The species may be confused with M. thompsonae n.sp. and M. tarnawskiae n.sp. but is separable from them by reference to conformation of RTA, presence of bilateral distal spine clusters on metatarsus I and II and both tarsi I and II with bilateral rows of small spines adjacent to scopula.

Etymology. The species is named in recognition of the valuable voluntary assistance given by Pam Mudford to the arachnology section of the Australian Museum, Sydney.

Distribution and natural history. ( Fig. 24A View Fig ) The spider is known only from the type locality, the town of Bateau Bay, N.S.W. The burrow is unknown.