Misgolas beni, 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: 15

publication ID

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

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scientific name

Misgolas beni


Misgolas beni   n.sp.

Figs. 10A–D, 12C

Material examined. HOLOTYPE Ƌ, AM KS38550, Camden, NSW (34°03'S 150°42'E), June, 1975, collector unknown. GoogleMaps  

Diagnosis. In male: Large brown spider, carapace length c. 8–9; rd surface of metatarsi IV without spines; venter pale with few sparse brown spots most concentrated between posterior book lungs ( Fig. 10D). Palpal bulb ( Fig. 10B,C) with rl embolic flange with c. 6 folds, margin convexly curved; embolus with small subdistal d apophysis. Cymbium with many squat blunt erect d spines on c. 7 ⁄ 8 of distal surface. Conformation of palp as figured ( Fig. 10A). Female unknown.


Male holotype ( Fig. 10A–D). Size. Carapace length 8.24, width 7.06. Abdomen length 8.23, width 5.49. Colour. Cephalothorax, chelicerae and limbs dark brown. When dry carapace bedecked with golden hirsute sheen. Abdomen dorsum dark brown with pattern of small pale bands in bilateral series of six.Venter pale with very few small scattered dark brown spots most concentrated between posterior book lungs. Carapace. Edge fringed with black bristles which encroach onto post foveal surface. Line of c. 14 remaining bases of missing setae along entire length of caput arch. Group of 4 bristles between PME; c. 5 posteriorly inclined bristles on clypeus. Weakly chitinized area with a few setae extends onto pleural membrane below clypeus. Fovea width 1.67, straight. Eyes. Raised on a distinct mound; anterior width 1.33, posterior width 1.22, length 0.69, width/length ratio 1.92. Line joining posterior edge of ALE   transects anterior 1 ⁄ 3 of AME. Posterior row recurved in front and behind. Chelicerae. Rastellum first row of 7(7) spines, second row of 8(6) spines and some smaller spines retreat along pd cheliceral edge. Intercheliceral tumescence present. Fang groove with 10(10) promarginal teeth and 16(16) smaller retromarginal/intermediate row teeth. Fang keels absent. Labium. Bulbous, length 0.97, width 1.20. Labiosternal suture narrow, undivided. Maxillae c. 51(64) fusiform antero-ental cuspules, c. half surmounted by a fine hair. Sternum. Length 4.61, width 3.63. All sigilla ovate; posterior pair twice diameter from margin, others by one diameter. Legs. Tibia I with apical bifid apophysis; distal process with 2(1) short pointed spines, proximal process with 3(3) longer pointed spines.

Palp I II III IV Femur 4.73 7.94 7.12 5.77 7.55 Patella 2.24 3.82 3.56 2.89 3.68 Tibia 3.99 5.71 5.10 3.38 6.63 Metatarsus — 5.71 5.22 4.73 6.87 Tarsus 2.05 3.32 3.13 3.13 3.75 Total 13.01 26.50 24.13 19.90 28.48

Palp ( Fig. 10A). Cymbium with many squat blunt erect spines distributed over distal 7 ⁄ 8 of dorsal surface; a few brown hairs projected forward from outer sides of cymbium lobes. RTA with slight sub-basal swelling, covered with d and rd short spines; distal half of rv surface of tibial excavation with an extended brush of c. 22 longer attenuate spines; DTA hooked with c. 16 short spines. TEM pallid, large and contiguous with RTA; pv surface weakly textured. Bulb ( Fig. 10B,C). Embolus straight, not twisted, with thorn-like subdistal d embolic apophysis terminating a narrow d ridge concurrent with the embolus; rl embolic flange with 6 folds, margin convexly curved. Scopula   . Dense on tarsi I and II, less dense on tarsi III and IV, incomplete and dense on metatarsi I and II, incomplete and sparse on metatarsi III and IV. Trichobothria. Palp: tarsi 9, tibia pd5 rd6. Leg I: tarsi 11, metatarsi 11, tibia pd8 rd7. Leg II: tarsi 11, metatarsi 12, tibia pd7 rd7. Leg III: tarsi 8, metatarsi 10, tibia pd6 rd6. Leg IV: tarsi 11, metatarsi 12, tibia pd6 rd7. Leg spination. Leg I: metatarsi v011; tibia v0112. Leg II: metatarsi v032; tibia v0112. Leg III: metatarsi v8 scattered, d011220; tibia v0113, pl00110, rl00110, patella pd6. Leg IV: metatarsus v8 scattered; tibia v6 scattered, rd011110. Abdomen. Abdomen covered with long dark bristles interspersed with pale hairs. Venter densely covered with pale hairs.

Etymology. The species is named in recognition of the author’s third son, Ben Wishart.

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


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