Misgolas trangae, 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 : 11-12

Misgolas trangae n.sp.

Figs. 6A–D , 12C

Material examined. HOLOTYPE Ƌ, AM KS49026 , Jamieson Park, Narrabeen, NSW (33°43'S 151°18'E), 5–19 March, 1996 pitfall trap site 1, M.R. Gray and H.M. Smith . PARATYPES ƋƋ, AM KS50019 , details same as holotype ; AM KS22843 , Balgowlah, NSW (33°47'S 151°15'E), 16 Apr. 1963, P.F. Gambrill .

Diagnosis. Males are small brown spiders, carapace length c. 5.5; rd surface of metatarsi IV without spines; venter pale with pattern of distinct brown spots ( Fig. 6D ). Palpal bulb ( Fig. 6B,C ) with rl embolic flange with 4 folds, margin convexly curved; small dorsal embolic apophysis placed adjacent to embolic flange. Conformation of palp as figured ( Fig. 6A ). Female unknown.

Description

Male holotype ( Fig. 6A–D ). Size. Carapace length 5.34, width 3.99. Abdomen length 4.79, width 2.89. Colour. Caput and chelicerae dark brown, thorax lighter brown. Limbs brown, dark laterally with some faint darker smudges. When dry carapace bedecked with golden hirsute sheen. Abdomen dorsum pale with brown bands in a bilateral series of c. 7 appearing more or less maculated. Venter pale with evenly scattered arrangement of dark brown spots. Carapace. Edge fringed with black bristles which encroach onto posterior 1 ⁄ 5 of post foveal surface. One anteriorly inclined bristle on caput arch. Bristles absent between PME; 3 posteriorly inclined bristles on clypeus.Weakly chitinized area extends onto pleuron membrane below clypeus. Fovea width 0.7, slightly recurved, posterior rim distorted. Eyes. Placed on a mound; anterior width 0.87, posterior width 0.77, length 0.51, width/length ratio 1.71. Line joining posterior edge of ALE transects anterior 1 ⁄ 4 of AME. Posterior row recurved in front, straight behind. Chelicerae. Rastellum first row of 5(5) spines, second row of 2(2) spines. Intercheliceral tumescence present. Fang groove with 5(6) large promarginal teeth and 4(2) (perhaps more obscured) small retromarginal/intermediate row teeth. Fang keels smooth. Labium. Bulbous, length 0.44, width 0.72. Labiosternal suture broad narrowing medially. Maxillae c. 25(21) small fusiform antero-ental cuspules. Sternum. Length 2.74, width 2.05. Anterior and middle pair sigilla small, round, submarginal; posterior pair larger, ovate, one diameter from margin. Legs. Tibia I with apical bifid apophysis; distal process with 2(2) short blunt and proximal process with 3(3) longer pointed spines.

Palp I II III IV Femur 2.51 4.61 4.05 3.32 4.98 Patella 1.23 2.33 2.15 1.66 2.27 Tibia 2.56 3.44 3.13 2.15 4.24 Metatarsus — 3.32 3.07 2.89 4.18 Tarsus 1.10 2.03 1.96 1.96 2.33 Total 7.20 15.73 14.36 11.98 17.50

Palp ( Fig. 6A ). Cymbium with dense cluster of long weak ensiform spines distributed over distal 2 ⁄ 3 of d surface. RTA swollen midway; covered with d and rd short spines; extended brush of c. 22 longer pointed spines on rv surface of mid region of tibial excavation; DTA hooked, terminated with c. 12 short spines. TEM contiguous with RTA; pv surface weakly textured. Bulb ( Fig. 6B,C ). Embolus broad, gently bent and twisted with small d embolic apophysis basally placed contiguous with rl embolic flange; flange with 4 folds, margin strongly convexly curved. Scopula . Dense on Tarsi I and II, sparse on tarsi III and IV, incomplete on metatarsi I and II. Trichobothria. Palp: tarsi 8, tibia pd5 rd5. Leg I: tarsi 12, metatarsi 11, tibia pd6 rd5. Leg II: tarsi 11, metatarsi 11, tibia pd5 rd5. Leg III: tarsi 10, metatarsi 10, tibia pd5 rd5. Leg IV: tarsi 11, metatarsi 12, tibia pd7 rd7. Leg spination. Leg I: metatarsi v01002; tibia v0112. Leg II: metatarsi v0202; tibia v0113. Leg III: tarsi rv001110; metatarsi v02212, d002020; tibia v0122, d0220; patella pd3. Leg IV: tarsi v12; metatarsi v8; tibia v0223. Abdomen. Bilateral cover of fine hairs.Venter and dorsum with larger hairs; dorsum with anteriorly placed group of c. 30 long bristles.

Taxonomic note. May be confused with M. maculosus for which the male is unknown. Because of the maculate d abdominal colouration, arrangement of brown spots on venter, absence of spines on rd surface of metatarsi IV and littoral location consideration was given for this spider being the male of M. maculosus (Rainbow & Pulleine, 1918) . Because the 30Km distance and the intersection of Sydney Harbour separating the respective localities this spider is determined here a good species.

Etymology. The species is named in recognition of the author’s second daughter, Trang Wishart.

Distribution and natural history ( Fig. 12C ). This spider is known only from Sydney’s coastal suburbs north of Port Jackson. The burrow is unknown.

dorsal; (C), prolateral. (D), venter.

and metatarsus IV retrodorsal; (B), abdomen dorsum; (C), venter.

Figures

Fig. 6. Misgolas trangae n.sp. (A–D) Ƌ, holotype AM KS49026. (A), right palp retrolateral. (B,C), right bulb: (B),

Fig. 12. Species distribution of Misgolas species in the Sydney region (eastern Australia) based on material examined. Key to symbols for maps (A) and (B): O Misgolas gracilis; A M. melancholicus; Z M. villosus. Map (C): • M. beni; Z M. cliffi; Δ M. lynabra; M. maculosus; O M. michaeli; * M. rodi; A M. trangi; * M. wayorum.