Misgolas tannerae, 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 : 45-47

publication ID

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

persistent identifier

https://treatment.plazi.org/id/823987EB-1658-0C03-6294-FC6A9DB8FB79

treatment provided by

Felipe

scientific name

Misgolas tannerae
status

sp. nov.

Misgolas tannerae View in CoL n.sp.

Figs 10A–I View Fig , 14C View Fig

Type material. HOLOTYPE ♂, AMS KS38699, Minnamurra Falls , nr Jamberoo, NSW (34°37'S 150°44'E), 15 Jun. 1966 (reared from juvenile captured 12 Nov. 1964) GoogleMaps . ALLOTYPE ♀, AMS KS38697, 12 Nov. 1964, locality details as for holoype. Paratypes ♂♂, AMS KS38556, AMS KS38564 & AMS KS38698 all details as for holotype. PARATYPES ♀♀, AMS KS38620, Minnamurra Lane , Jamberoo (34°38'58"S 150°46'33"E), 9 Aug. 1991, Peter Butler; AMS KS69971, Minnamurra Falls Reserve, excavated from roadside outside entrance (34°37'S 150°44'E), 14 Jun. 2003, GW & S. Jordan GoogleMaps .

Diagnosis. Medium (male carapace length, c. 6.5–8) to large (female carapace length, c. 8–11.6) sized brown spiders ( Fig. 10I View Fig ); retrodorsal surface of metatarsus IV without spines ( Fig. 10F View Fig ); abdomen lateral surfaces with scattered, distinctive dark brown spots ( Fig. 10D,G View Fig ); venter entirely pallid devoid of markings ( Fig. 10E,H View Fig ). In male: palpal bulb ( Fig. 10B,C View Fig ) retrolateral embolic flange with 4 folds, margin curved; embolus with thornlike, distally pointed, dorsal apophysis distant from prolaterally curved embolus tip. Cymbium with weak, long, acicular spines arising from distal half of dorsal surface. Retrolateral tibial apophysis abruptly compressed c. midway, distally digitate; conformation of palpal tibia as figured ( Fig. 10A View Fig ).

Description

Male holotype ( Fig. 10A–E View Fig ). Size. Carapace length 7.37, width 6.02. Abdomen length 8.04, width 5.49. — Colour. In alcohol chelicerae, carapace and limbs brown; generally unicolourous. Dark brown lateral limb smudges indistinct. Fine pallid prostrate hairs cover interstrial areas of thorax. Brown maculation of dorsum divided by c. six transverse pallid lines. Small precise dark brown spots scattered on abdomen lateral surfaces ( Fig. 10D View Fig ); venter entirely pallid ( Fig. 10E View Fig ). — Carapace. Edge fringed with black bristles which encroach onto posterior edge of post foveal surface; line of 5 black bristles on caput arch, sparse on remainder of carapace surface, none between PME, 8 on clypeus and weakly chitinous pleuron membrane below clypeus. Fovea width 1.33, straight, recurved lateral edges, lacking pitted intrusion on posterior wall. — Eyes. Raised on mound. Ocular area immediately adjacent to eyes & between PME black. Anterior width 1.15, posterior width 1.10, length 0.70, width/length ratio 1.64. Line joining posterior edges of ALE transects anterior quarter of AME. Posterior row recurved in front and behind. — Chelicerae. Rastellum single row of 5(6) spines, 1(1) behind. Fang groove with 8(8) large promarginal teeth and 9(12) small retromarginal/intermediate row teeth. Intercheliceral tumescence small, pallid, not raised. — Labium. Bulbous. Length 0.77, width 1.02. Labiosternal suture broad, centrally divided. — Maxillae c. 22(24) antero-ental, small, subulate cuspules surmounted by a hair. — Sternum. Length 3.82, width 3.19. Sigilla small, sub-round; anterior pair own diameter, mid pair twice its diameter and posterior pair thrice its diameter distant from margin. — Legs. Tibia I with distal bifid apophysis; distal process with 2 short, compact spines (1 acute, 1 blunt); proximal process with 3(2) pointed spines.

Palp I II III IV Femur 4.05 7.06 6.75 4.92 7.18 Patella 1.66 3.38 3.01 2.52 3.13 Tibia 3.87 4.61 4.67 3.38 6.02 Metatarsus — 4.85 4.67 4.36 6.26 Tarsus 1.90 2.52 2.52 2.70 3.19 Total 11.48 22.42 21.62 17.88 25.78 Palp. ( Fig. 10A View Fig ) Cymbium with bilateral placed long fine pallid setae; distal third of d surface with many closely concentrated, acicular, forward inclined long light brown spines. RTA proximally broad, abruptly reduced c. midway, becoming digitate; d surface covered with short, pointed spines. Tibial excavation rv edge suspends extensive brush of long curvilinear spines; edge terminated by hooked DTA, tip covered by c. 30 short spines. Pallid TEM prominent, contiguous with RTA, pl surface with discernable TET. Tibial excavation surface weakly chitinized. — Bulb. ( Fig. 10B,C View Fig ) Length 2.15. Embolic rl flange edge curved, with 4 prominent folds. Embolus, with thornlike, distally pointed, dorsal apophysis distant from prolaterally curved embolus tip. Length from embolic apophysis to embolus tip (a) 0.40; length from embolic flange terminus to embolus tip (f) 0.74; a/f ratio 0.53. — 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 11, metatarsi 17, tibia pd 7, rd 8. Leg II: tarsi 12, metatarsi 13, tibia pd 7, rd 7. Leg III: tarsi 13, metatarsi 13, tibia pd 7, rd 7. Leg IV: tarsi 12, metatarsi 13, tibia pd 7, rd 8. — Leg spination. Leg I: metatarsi v few bristles; tibia v 01112, pd 0110. Leg II: metatarsi rv 0100; tibia v 0113, pd 00110. Leg III: metatarsi v 0113, d 012220; tibia v 0113, pl 010, rl 00110; patella pd 7. Leg IV: metatarsi v 9 scattered; tibia v 7 scattered spines and spinules, rd 011110. — Abdomen. Dorsum covered with erect long, brown bristles. Prostrate hairs on lateral surfaces and venter.

Female allotype ( Fig. 10F–H View Fig ). Size. Carapace length 11.56, width 8.62.Abdomen length 13.46, width 9.49. — Colour. In alcohol chelicerae, carapace and limbs light brown; generally unicolourous. Dark brown indistinct bilateral limb smudges on femora, patella and tibia of palps and legs I and II. Fine pallid prostrate hairs provide dense golden sheen to caput and interstrial areas of thorax. Dark brown maculated pattern on dorsum. Small precise dark brown spots scattered on abdomen lateral surfaces ( Fig. 10G View Fig ). Venter entirely pallid ( Fig. 10H View Fig ). — Carapace. Edge fringed with pallid hairs. Line of 7 fine dark and 3 larger median bristles on caput arch; few bristles between PME; c. 14 bristles on clypeus and pleuron membrane below clypeus. Fovea width 2.69, straight; posterior wall not pitted. — Eyes. Placed on a low mound. Area immediately adjacent to eyes dark brown. Anterior width 1.79, posterior width 1.66, length 1.05, width/length ratio 1.79. Line joining posterior edges of ALE tangential to anterior edges of AME. Posterior row straight in front, recurved behind. — Chelicerae. Rastellum row of 7(6) spines; c. 8(5) smaller spines behind. Fang groove with c. 9(9) promarginal teeth and c. 16(15) small retromarginal/ intermediate row teeth, partly masked by long orange setae. — Labium. Bulbous, length 1.61, width 2.12. Labio-sternal suture narrow, continuous. — Maxillae c. 60(60) short rounded antero-ental cuspules partly masked by long orange setae. — Sternum. Length 6.51, width 5.10. Sigilla anterior pair small, round, 1 diameter from margin; mid-pair larger, ovate, 1 length from margin; posterior pair largest, ovateelongate, 1 length from margin. — Legs:

Palp I II III IV Femur 6.70 8.62 7.94 6.20 8.72 Patella 3.81 5.00 4.50 4.11 5.39 Tibia 4.35 5.59 4.90 3.13 7.15 Metatarsus — 4.90 4.21 3.99 6.08 Tarsus 4.85 2.94 2.65 2.89 3.04 Total 19.71 27.05 24.20 20.32 30.38

Scopula . Dark grey in colour. Dense, complete v cover on palpal tarsi and tarsi & metatarsi I; less dense, complete on tarsi II, incomplete on metatarsi II; remnant on tarsi III, absent on leg IV. — Trichobothria. Palp: tarsi 16, tibia pd 9, rd 9. Leg I: tarsi 26, metatarsi 21, tibia pd 10, rd 12. Leg II: tarsi 19, metatarsi 20, tibia pd 11, rd 10. Leg III: tarsi 22, metatarsi 21, tibia pd 8, rd 11. Leg IV: tarsi 17, metatarsi 24, tibia pd 10, rd 12. — Leg spination. Palp: tarsi pv 1 proximal, rv 2 proximal; tibia pv 8 scattered, rv 4 scattered. Leg I: metatarsi pv 01, rv 0011002; tibia v 8 scattered. Leg II: tarsi 00010, metatarsi v 7 scattered; tibia v 7 scattered, pl 0110. Leg III: tarsi v 11 scattered; metatarsi v 8 scattered, pd 0111110, rd 001110; tibia v 6 scattered, pl 0110, rl 0110; patella pd 11. Leg IV: tarsi v 11 scattered; metatarsi v 12 scattered. — Abdomen. Dorsum sparsely covered with posteriorly inclined, brown bristles. Prostrate, weak, fine hairs on lateral surfaces; venter covered densely with longer hairs. — Genitalia. Sclerotized lip of epigynum straight.

Etymology. The species is named in honour of Miss Janice Tanner, one time principal of the Berry Primary School, the grounds of which are the type locality of M. gwennethae n.sp. Her eagerness in facilitating the provision of specimens and behaviour information together with enthusiasm for the development of pupil interest is recognized.

Distribution and natural history ( Fig. 14C View Fig ) This species known only from type locality and nearby township of Jamberoo. The largest burrows readily identified amongst garden mulch and grassed areas; entrance up to 2 cm

diameter; lip attached by silk to leaves and forest debris such that entrance is supported about a centimetre above ground level. Below ground level the burrow is lined with fragile silken tube to depth of c. 20 cm.

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Idiopidae

Genus

Misgolas

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