Misgolas browningi, 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 : 79-80

Misgolas browningi n.sp.

Figs 21A–H , 24D

Type material. HOLOTYPE?, AM KS5437 , Kerewong State Forest , nr Lorne, site 108(3) (31°36'S 152°34'E), 15 July 1979, pit fall trap field No. 1598, set 30 May 1979, collected 1 Sep. 1979, D. Milledge . PARATYPES. ??: AM KS5407 , Kerewong SF, nr Lorne, site 108(1) (31°36'S 152°34'E), 15 July 1979, pit fall trap field No. 1596, set 30 May 1979, collected 1 Sep. 1979, D. Milledge . AM KS5418 , Kerewong SF, nr Lorne, site 108(2) (31°36'S 152°34'E), 15 July 1979, pit fall trap field No. 1597, set 30 May 1979, collected 1 Sep. 1979, D. Milledge.All type specimens brittle and easily damaged, possibly first preserved in formalin .

Diagnosis. In male: small dark tan spider, carapace length c. 4.50; retrodorsal surface of metatarsi IV without spines ( Fig. 21G ); venter entirely dark brown ( Fig. 21H ). All tarsi without spines ( Fig. 21D–G ). Palpal bulb ( Fig. 21B,C ) retrolateral embolic flange with 3 prominent and c. 3–4 minor folds, margin straight; embolic apophysis absent. Palp as figured ( Fig. 21A ), retrolateral tibial apophysis short, stout; distal tibial apophysis enlarged, cymbium dorsal surface with dense cover of weak bristles and long pallid hair. Female not known.

Description

Male holotype ( Fig. 21A–H ). Size. Carapace length 4.48, width3.68. Abdomen length 4.54, width 2.77. Colour. In alcohol carapace, chelicerae and all femora dark brown; distal limb segments light tan. Pallid hairs on carapace concentrated on caput and carapace perimeter, extending onto chelicerae and proximal limb segments. Elongate dark brown bilateral smudges most pronounced on anterior limbs, reduced on posterior limbs ( Fig. 21D–G ). Abdomen dorsum dark brown with 6 pallid transverse chevrons; venter entirely dark brown ( Fig. 21H ). Carapace. Edge fringed with black bristles which encroach onto posterior half of post foveal surface. Line of 6 bristles on caput arch. Group of 6 small bristles with many fuscous hairs on clypeus. Area on pleuron membrane below clypeus free of chitin and setae. Fovea width 0.92, straight, deep, recurved edges; posterior wall not pitted. Eyes. Raised on mound. Area adjacent to eyes black; anterior width 1.05, posterior width 0.87, length 0.55, width/length ratio 1.91. Line joining posterior edge of ALE bisects AME. Posterior row recurved in front, straight behind. Chelicerae. Rastellum row of 5(5) spines, 2(3) behind. Fang groove teeth and intercheliceral tumescence detail not visible without damaging chelicerae. Labium. Bulbous. Length 0.51, width 0.79. Labio-sternal suture broad, continuous, straight, extremities procurved. Maxillae c. 27(27) squat, pointed anteroental cuspules. Sternum. Bulbous, not elongate, almost round. Length 2.48, width 2.00. Sigilla round: anterior pair small, marginal; mid pair small, own diameter from margin; posterior pair larger, twice diameter from margin. Legs. Right leg III missing. Tibia I with distal bifid apophysis. Distal process with 2(1) short spines, proximal process with 2(1) long spines. All inferior third claws reduced or lost.

palp I II III IV femur 2.64 5.22 4.66 (3.47) 5.03 patella 1.15 2.39 2.09 (1.60) 2.21 tibia 2.29 4.18 3.56 (2.21) 4.79 metatarsus — 3.62 3.13 (2.82) 4.24 tarsus 1.03 2.28 2.03 (1.91) 2.46 total 7.11 17.69 15.47 (12.01) 18.73 Palp ( Fig. 21A ). Cymbium d surface with dense cover of weak bristles and long prostrate pallid hair; spines absent. RTA short, stout, with cover of short rd spines which continue along rv edge of tibial excavation and onto a bulky, almost vertically suspended, DTA. TEM large, pallid, contiguous with RTA, pl surface with prominent TET. Bulb ( Fig. 21B,C ) Embolic rl flange with 3 prominent plus 2 minor folds, margin straight, occupying almost entire length of straight embolus. Embolic apophysis absent. Scopula. Complete on all tarsi. Progressively weaker and incomplete on metatarsi. Trichobothria. Palp: tarsi 8, tibia pd 4, rd 5; Leg I: tarsi 10, metatarsi 12, tibia pd 6, rd 5; Leg II: tarsi 9, metatarsi 10, tibia pd 6, rd 5; Leg III: tarsi (9), metatarsi (9), tibia pd (5), rd (5); Leg IV: tarsi 10, metatarsi 9, tibia pd 6, rd 6. Leg spination. ( Fig. 21D–G ) Absent on all tarsi. Leg I: tibia v 01112. Leg II: metatarsi v 010, tibia v 01113. Leg III: metatarsi (d 0020020), tibia (rl 010, v 0113), patella pd (5). Leg IV: metatarsi v 01200, tibia v 0111. Abdomen. Dorsum covered with long brown bristles. Venter covered with shorter, weaker, brown bristles.

Etymology. The species is named in recognition of assistance given to GW by Mr George Browning of Coogee, NSW.

Distribution and natural history. ( Fig. 24D ) This spider is known only from the type locality, the Kerewong State Forest near the town of Lorne, N.S.W. The burrow is unknown.

Figures

Fig.21. Misgolas browningi n.sp.A–C,H?, paratypeAM KS5418.(A), right palp retrolateral.(B,C), right bulb: B, dorsal; C, prolateral.(H), venter. D–G?, holotype AM KS5437: (D,E), right leg I: D, prolateral; E, retrolateral. (F,G), right leg IV: F, prolateral; G, retrolateral.

Fig. 24. A–D. Distribution of Misgolas species in the New South Wales Central Coast (eastern Australia) based on material examined (Inset [Fig. 24A] with catchment area).