Misgolas michaeli, Wishart, 2006

Wishart, Graham, 2006, Trapdoor Spiders of the Genus Misgolas (Mygalomorphae: Idiopidae) in the Sydney Region, Australia, With Notes on Synonymies Attributed to M. rapax, Records of the Australian Museum 58 (1), pp. 1-18: 17-18

publication ID

http://doi.org/ 10.3853/j.0067-1975.58.2006.1446

persistent identifier

http://treatment.plazi.org/id/03882C0A-B060-FF8C-AB5C-F9A9FD73F87D

treatment provided by

Felipe

scientific name

Misgolas michaeli
status

n.sp.

Misgolas michaeli   n.sp.

Figs. 11A–D, 12C

Material examined. HOLOTYPE Ƌ, AM KS51819, Douglas Park, NSW (34°11'S 150°42'E), 28 Nov. 2000, Julie Samphier GoogleMaps   . PARATYPE Ƌ, AM KS51820, 28 Oct. 2000, other details as for holotype   .

Description

Diagnosis. In male: Very large dark brown spider, carapace length c. 9–10, rd surface metatarsi IV without spines; venter entirely black ( Fig. 11D). Palpal bulb ( Fig. 11B,C) with rl embolic flange with c. 5–6 folds, margin straight; embolus with subdistal d apophysis. Cymbium with many short blunt sub-erect slightly anteriorly inclined d spines on c. 7 ⁄ 8 of distal surface. Conformation of palp as figured ( Fig. 11A). Female unknown.

Male holotype ( Fig. 11A–D). Size. Carapace length 9.51, width 7.55. Abdomen length 9.12, width 5.88. Colour. Dark brown almost black. When dry carapace seen to have golden interstrial hairs. Abdomen dorsum with narrow bands in bilateral series of c. 6. Venter entirely black. Carapace. Edge fringed with black bristles which lengthen posteriorly and encroach onto posterior half of post foveal surface. Line of c. 12 hairs along entire length of caput arch. Group of c. 8 bristles between PME; c. 14 posteriorly inclined bristles on clypeus. Weakly chitinized area with few setae extends onto pleuron membrane below clypeus. Fovea width 1.70, straight. Eyes. Placed on low mound; anterior width 1.54, posterior width 1.38, length 0.82, width/length ratio 1.88. Line joining posterior edge of ALE   transects anterior 1 ⁄ 4 of AME. Posterior row recurved in front and behind. Chelicerae. Rastellum anterior row of 6(6) spines, 2(2) behind. Intercheliceral tumescence present. Fang groove with 10(9) promarginal teeth and 12(13) smaller retromarginal/intermediate row teeth. Fang keels absent. Labium. Bulbous, length 0.97, width 1.47. Labiosternal suture broad, undivided. Maxillae c. 55(51) fusiform antero-ental cuspules, a few surmounted by a fine hair. Sternum. Length 5.03, width 3.93. All sigilla small, round; c. 1.5 diameters from margin. Legs. Tibia I with apical bifid apophysis; distal process with 2(1) pointed spines and proximal process with 3(3) longer pointed spines.

Palp I II III IV Femur 4.54 8.04 7.25 5.78 7.64 Patella 2.25 4.02 3.62 3.04 3.82 Tibia 4.07 5.39 5.00 3.53 6.86 Metatarsus — 5.59 5.29 4.80 6.57 Tarsus 2.17 3.23 3.23 2.94 3.72 Total 13.03 26.27 24.39 20.09 28.61

Palp ( Fig. 11A). Cymbium with many short blunt suberect slightly anteriorly inclined spines distributed over distal 7 ⁄ 8 of dorsal surface; some brown hairs projected forward from outer sides of cymbial lobes. Tibial rv apophysis swollen sub-basely, covered with d and rl short spines; distal half of rv surface of tibial excavation with an extended brush of c. 18 longer attenuate spines; DTA hooked with c. 14 short spines. TEM pallid large and contiguous with RTA; pv surface weakly textured. Bulb ( Fig. 11B,C). Embolus straight, not twisted, with thorn-like subdistal d embolic apophysis terminating narrow d ridge concurrent with embolus; rl embolic flange with c. 5–6 folds, margin straight. Scopula   . Dense on all tarsi. Incomplete on all metatarsi. Trichobothria. Palp: tarsi 9, tibia pd 5, rd 6. Leg I: tarsi 12, metatarsi 11, tibia pd 7, rd 7. Leg II: tarsi 11, metatarsi 12, tibia pd 7, rd 7. Leg III: tarsi 12, metatarsi 9, tibia pd 6, rd 6. Leg IV: tarsi 12, metatarsi 13, tibia pd 7, rd 7. Leg spination. Leg I: metatarsi v0100; tibia v010102. Leg II: metatarsi rv011100, tibia v00012. Leg III: metatarsi d0121220; v1213; tibia pl00110, rl00110, patella pd5; v0114. Leg IV: tarsi pv01010; metatarsi v011214; tibia v0112. Abdomen. Entirely covered in long dark hairs. Dorsum with understorey of fine golden hairs.

Etymology. The species is named in recognition of the author’s colleague and mentor Dr Michael Gray.

Distribution and natural history ( Fig. 12C). Known only from the type locality. The burrow is unknown.

Remarks. This species may be confused with A. beni   n.sp. and A. rodi   n.sp but is separable from them by reference to conformation of dorsal spines on cymbium, erect M. beni   , anteriorly inclined M. rodi   .

ACKNOWLEDGMENTS. My thanks to the Australian Museum for allowing my association and access to the collection. Especially I acknowledge my mentor, Dr Michael Gray. I thank Ms Helen Smith for mapping, the late Dr Glenn Hunt for his interest, the AM spider room staff for their stimulating company and Dr Robert Raven for unceasing encouragement. I acknowledge my neighbour, Dr Peter Linklater, the perfect host and confidant.

AM

Australian Museum

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Idiopidae

Genus

Misgolas