Misgolas davidwilsoni, 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 : 64-65

publication ID

https://doi.org/ 10.3853/j.0067-1975.60.2008.1495

persistent identifier

https://treatment.plazi.org/id/CE27C928-FF9B-5902-FEBD-F9DA959AFA8D

treatment provided by

Felipe

scientific name

Misgolas davidwilsoni
status

sp. nov.

Misgolas davidwilsoni View in CoL n.sp.

Figs 12A–F View Fig , 24C View Fig

Type material. HOLOTYPE?, AM KS51761 , Lisarow (33°23'S 151°23'E), 28 Jan. 1998, Lyn Abra GoogleMaps . PARATYPE?, AM KS51775 , Wyoming (33°27'S 151°21'E), 25 Feb. 1999, Lyn Abra GoogleMaps .

Diagnosis. In male: medium sized tan spider, carapace length c. 7.3–7.8; retrodorsal surface of metatarsi IV without spines ( Fig. 12E View Fig ). Venter pale with pattern of brown speckles in 2–3 weak transverse bands ( Fig. 12F View Fig ). Spines absent on tarsi I;

Description

Male holotype ( Figs 12A–F View Fig ). Size. Carapace length 7.31, width 5.77. Abdomen length 7.37, width 4.61. Colour. In alcohol carapace, legs, palps and chelicerae mid tan, darker brown smudges absent from lateral limb surfaces. Golden fuscous hairs on caput, absent on limbs. Abdomen dorsum dark brown with distinct pattern of pallid bands in bilateral series of six. Venter pallid with brown speckles most concentrated into three weak transverse bands ( Fig. 12F View Fig ). Carapace. Edge fringed with black bristles that encroach onto posterior third of post foveal surface. Line of c. 8 median bristles on caput arch. Group of 10 bristles between PME; 3 posteriorly inclined bristles on clypeus; group of c.10 smaller setae on weakly chitinous area extending onto pleuron membrane below clypeus. Fovea width 1.43, slightly recurved, edges recurved, pitted intrusion absent from posterior wall. Eyes. Raised on mound, area immediately adjacent to eyes black, PME excepted; anterior width 1.31, posterior width 1.20, length 0.67, width/length ratio 1.95. Line joining posterior edge of ALE transects anterior third of AME. Posterior row straight. Chelicerae. Rastellum row of 6(5) spines on anteroental edge; few smaller spines retreating along pd edge. Intercheliceral tumescence small, pallid, elongate, raised on a cant. Fang groove with 11(11) promarginal teeth and 14(15) smaller retromarginal/intermediate row teeth. Labium. Bulbous, length 0.79, width 1.04. Labio-sternal suture broad, narrowed medially, undivided. Maxillae c. 43(51) short blunt anteroental cuspules. Sternum. Length 3.80, width 2.82. Sigilla round, anterior pair small and closest to margin, mid and posterior pairs progressively larger, their own diameter away from margin. Legs. Tibia I with distal bifid apophysis; distal process with 2(2) short straight spines, proximal process with 2(2) long bent pointed spines.

palp I II III IV femur 3.44 6.39 5.89 4.85 6.63 patella 1.72 3.19 2.94 2.33 3.07 tibia 3.44 4.61 4.11 2.89 5.71 metatarsus — 4.42 3.99 3.68 5.46 tarsus 1.72 2.76 2.58 2.34 2.70 total 10.32 21.37 19.51 16.09 23.57

Palp ( Fig. 12A View Fig ). Cymbium with c. 54 long, pointed, skewerlike spines, anteriorly inclined c. 45° to cymbium axis, distributed over distal half of d surface. RTA digitate, not swollen basally, inclined slightly downwards, covered with squat pointed d and rd spines which continue along rv edge of tibial excavation terminating with an extended brush of c. 9 long spines. DTA small, reduced to a mound. TEM large, pallid, adjacent to RTA. TET weak, visible on pl region of TEM. Bulb. ( Fig. 12B,C View Fig ) Embolic rl flange narrow, with c. 7 fine folds, margin curved under embolus. Embolus curved pl. Tip with pl bend, surmounted by small distally pointed pd apophysis. Scopula. Dense and complete on tarsi I and II; dense on distal fifth of metatarsi I and II; absent on legs III and IV. Trichobothria. Palp: tarsi 8, tibia pd 5, rd 5. Leg I: tarsi 10, metatarsi 10, tibia pd 6, rd 6. Leg II: tarsi 10, metatarsi 10, tibia pd 6, rd 6. Leg III: tarsi 9, metatarsi 7, tibia pd 6, rd 5. Leg IV: tarsi 10, metatarsi 11, tibia pd 7, rd 6. Leg spination. Leg I: metatarsi v 00113; tibia v 0112. Leg II: ( Fig. 12D View Fig ) tarsi rv row of 13 small spines adjacent to scopula; metatarsi v 12 scattered; tibia v 01113. Leg III: tarsi v 42 scattered; metatarsi v 11 scattered, d 002120; tibia v 0113, pd 010, rd 00110; patella pd 8. Leg IV: ( Fig. 12E View Fig ) tarsi v 35 scattered; metatarsi v 0222. Abdomen. Dorsum with cover of long brown hairs increasing in number and becoming finer laterally and covering venter. Dorsum hairs with underlying fine hairs.

Etymology. The species is named in recognition of Dr David Wilson, venoms researcher.

Distribution and natural history ( Fig. 24C View Fig ). This spider is known only from the Lisarow-Berkley Vale locality of the N.S.W. Central Coast. The burrow is unknown.

AM

Australian Museum

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Idiopidae

Genus

Misgolas

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