Misgolas rowelli, Wishart, 2011

Wishart, Graham, 2011, Trapdoor Spiders of the Genus Misgolas (Mygalomorphae: Idiopidae) in the Illawarra and South Coast Regions of New South Wales, Australia, Records of the Australian Museum 63 (1), pp. 33-51: 44-45

publication ID

http://doi.org/ 10.3853/j.0067-1975.63.2011.1553

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scientific name

Misgolas rowelli


Misgolas rowelli   n.sp.

Fig. 9A–H View Fig , 14A View Fig

Type material. HOLOTYPE ♂, AMS KS51813, Minnamurra, nr Kiama, NSW, in school grounds (34°37'29"S 150°51'08"E), 1 Jun. 2000. PARATYPES ♂♂, AMS KS22398, Minnamurra village , NSW (34°37'S 150°51'E), 15 May 1995, Mrs Kelly ; AMS KS50003, Minnamurra village , NSW (34°37'S 150°51'E), 22 May 1997, Paul Askew ; AMS KS51796, AMS KS51797 and AMS KS51798, 141 Charles Ave., Minnamurra village, NSW (34°37'S 150°51'E), 16 Apr. 2000, Elizabeth Larborn, from home swimming pool GoogleMaps   .

Diagnosis. In male medium sized brown spider, carapace length c. 6–7.5; retrodorsal surface of metatarsus IV usually with 1 or 2 spines ( Fig. 9E View Fig ); venter pattern as figured, saturation density various ( Fig. 9F–H View Fig ). Palpal bulb ( Fig. 9B,C View Fig ) retrolateral embolic flange with 6 or 7 folds, margin gently curved; embolus with small, thornlike, dorsal apophysis distant from embolus tip. Cymbium with weak, long, acicular spines arising from distal third of dorsal surface ( Fig. 9D View Fig ). Conformation of palpal tibia as figured ( Fig. 9A View Fig ). Female not known.


Male holotype ( Fig. 9A–E View Fig ). Size. Carapace length 7.06, width 5.59. Abdomen length 6.45, width 3.99. — Colour. In alcohol chelicerae and abdomen dorsum dark brown, carapace and limbs brown. Weak, dark brown smudges on rl surfaces of patella and tibia I and patella II. Fine pallid prostrate hairs cover carapace. Abdomen dorsum divided by six precise centrally divided transverse pallid lines. Venter pallid with cover of small dark speckles most concentrated immediately adjacent to PMS ( Fig. 9F View Fig ). — Carapace. Edge fringed with black bristles which encroach onto posterior quarter of post foveal surface; line of 3 fine black bristles on caput arch, none between PME, 18 between ALE   and on clypeus. Some weak bristles on non-chitinized pleuron membrane below clypeus. Fovea width 1.13, straight, recurved lateral edges, posterior wall basally, centrally divided by minute pitted intrusion. — Eyes. Raised on mound. Ocular area varying shades of dark brown. Anterior width 1.13, posterior width 0.97, length 0.67, width/length ratio 1.69. Line joining posterior edges of ALE   transects anterior sixth of AME. Posterior row straight. — Chelicerae. Rastellum single row of 6(6) small spines. Fang groove with 8(9) large promarginal teeth and 15(12) small retromarginal/intermediate row teeth. Intercheliceral tumescence pallid, extending behind proximal teeth of fang groove; surface with complex cover of setae. — Labium. Bulbous. Length 0.69, width 0.97. Labiosternal suture continuous, broadening laterally. — Maxillae c. 57(48) antero-ental, small, ovoid cuspules. — Sternum. Length 3.62, width 2.82. Sigilla small, sub-round, gradually enlarging from first to third pairs, each their own diameter distant from margin. — Legs. Tibia I with distal bifid apophysis; distal process with 2(2) short, compact spines; proximal process with 3(3) long, sinuous, pointed spines.

Palp I II III IV Femur 3.87 6.57 6.02 4.79 6.26 Patella 1.78 3.25 2.95 2.27 2.95 Tibia 3.99 4.79 4.11 2.82 5.34 Metatarsus — 5.22 4.42 3.99 5.77 Tarsus 1.90 3.07 2.76 2.52 3.07 Total 11.54 22.90 20.26 16.39 23.39

Wishart: trapdoor spiders of New South Wales 45 Palp. ( Fig. 9A View Fig ) Distal third of cymbium d surface with c. 25 weak, long, acicular spines, steeply inclined forward ( Fig. 9D View Fig ). RTA d surface flat, covered with many short, pointed spines. Tibial excavation rv edge suspends brush of c. 16 longer spines; edge terminated by hooked DTA, tip covered by c. 12 short spines. Pallid TEM prominent, pl surface with discernable TET. Tibial excavation surface weakly chitinized. — Bulb. ( Fig. 9B,C View Fig ) Length 2.10. Embolic rl flange edge gently curved, with 6 folds. Embolus with thornlike, distally pointed, dorsal apophysis distant from prolaterally curved embolus tip. Length from embolic apophysis to embolus tip (a) 0.28; length from embolic flange terminus to embolus tip (f) 0.61; a/f ratio 0.46. — Scopula   . Complete on all tarsi; metatarsi I and II incomplete; weak distal remnant on metatarsi III and IV. — Trichobothria. Palp: tarsi 10, tibia pd 6, rd 6. Leg I: tarsi 14, metatarsi 12, tibia pd 6, rd 6. Leg II: tarsi 12, metatarsi 12, tibia pd 6, rd 6. Leg III: tarsi 11, metatarsi 10, tibia pd 5, rd 6. Leg IV: tarsi 12, metatarsi 14, tibia pd 6, rd 7. — Leg spination. Leg I: metatarsi v 0102; tibia v 0112, pd 010. Leg II: metatarsi v 011003; tibia v 01103, pl 00110, pd 010. Leg III: metatarsi v 022, pd 01010, rd 001110; tibia v 0113, pl 0110, rl 00110; patella pd 5. Leg IV: metatarsi v 00223, rd 001010; tibia v 0222. — Abdomen. Dorsum covered with erect, long, brown bristles with understory of fine pallid setae. Venter covered by weak brown bristles. Fine pallid setae on venter and lateral surfaces.

Etymology. The species is named in recognition of Associate Professor David M. Rowell, geneticist and gifted teacher at the Australian National University.

Distribution and natural history ( Fig. 14A View Fig ) This species known only from type locality, the seaside village of Minnamurra, NSW. Limited data indicates mature males wander during the annual period of April to June. The burrow is not known.