Ischnothyreus comicus, Edward & Harvey, 2014

Edward, Karen L. & Harvey, Mark S., 2014, Australian Goblin Spiders Of The Genus Ischnothyreus (Araneae, Oonopidae), Bulletin of the American Museum of Natural History 2014 (389), pp. 1-144 : 32-37

Ischnothyreus comicus , new species Figures 13–14 , map 4

TYPES: AUSTRALIA: Queensland: Male holotype from rainforest, 4.5 km W Cape Tribulation, 760 m, 16.08333 ° S, 145.43333 ° E (23 Sept.–7 Oct. 1982, G. Monteith, D. Yeates, G. Thompson), deposited in QM ( S16042 , PBI_OON 25943). Female allotype from 4 km West Cape Tribulation, rainforest, 720 m, 16.08333 ° S, 145.43330 ° E (24 Sept. 1982, G. Monteith, D. Yeates, G. Thompson), depositied in QM (16055, PBI_OON 25967).

ETYMOLOGY: The specific epithet is from the Latin comicus , meaning ‘‘pertaining to comedy’’ ( Brown, 1956), and refers to the female smile-shaped epigynal atrium with rounded lateral edges.

DIAGNOSIS: This species is similar to I. meidamon , sp. nov. However, males can be distinguished by the distal tip of the embolic region of the palp, which is obtusely bent at a right angle to the bulb and is longer than wide (fig. 14A, B). The female epigynal region has an epigynal atrium that is wider than high and smile shaped like I. meidamon , sp. nov., but instead exhibits rounded lateral edges (figs. 13I, 14F).

MALE (PBI_OON 25943, figs. 13A–C, G– H, 14A–E of paratype ³). Total length 1.49. CEPHALOTHORAX: Carapace pale orange, broadly oval in dorsal view, pars cephalica slightly elevated in lateral view, anteriorly narrowed to 0.49 times its maximum width or less, anterolateral corners without extension or projections, surface of elevated portion of pars cephalica finely reticulate, sides finely reticulate; nonmarginal pars cephalica setae light. Clypeus margin unmodified, straight in front view, low, ALE separated from edge of carapace by less than their radius; setae light. Eyes: ALE largest, ALE circular, PME oval, PLE oval; posterior eye row straight from above; ALE touching, ALE-PLE touching. Sternum as long as wide, yellow, uniform; setae light, evenly scattered. Chelicerae, endites, and labium pale orange. Chelicerae straight, anterior face unmodified; promargin of chelicerae with one or two larger denticles; fang shape normal, without prominent basal process; setae light. Labium elongated hexagon, not fused to sternum, anterior margin indented at middle, same as sternum in sclerotization; with six or more setae on anterior margin. Endites anteromedian tip with one strong, toothlike projection, more heavily sclerotized than sternum. ABDO- MEN: Ovoid; dorsum soft portions white. Dorsal scutum pale orange, covering 1/2 to 3/4 of abdomen, more than 1/2 to most of abdomen width, middle surface smooth, sides smooth. Epigastric scutum small lateral sclerites absent. Postepigastric scutum pale orange, covering about 1/2 of abdominal length. Dorsum, epigastric area, and postepigastric area setae light. LEGS: Pale orange, without color pattern; patella plus tibia I shorter than carapace. Leg spination: femora: I p0-1-1; II p0-1-0; tibiae: I, II p2-2-0; v2-2-0; metatarsi: I, II p1-1-0; v1-1-0. GEN- ITALIA: Palp proximal segments brown; embolus light; femur shorter than trochanter, without posteriorly rounded lateral dilation; patella about as long as femur; cymbium brown; bulb brown, 1 to 1.5 times as long as cymbium, stout; embolic region obtusely bent at right angle to palpal bulb, longer than wide, distally rounded, not tapered (fig. 14A, B).

FEMALE (PBI_OON 25967, figs. 13D–F, I, 14F). Total length 1.90. ABDOMEN: Book lung covers ovoid. Dorsal scutum between 1/4 and 1/2 abdomen width. Postepigastric scutum widely hexagonal, covering about 1/3 of the abdominal length. LEGS: Leg spination: femora: I p0-1-1; II p0-1-0; tibiae: I, II p2-2-0; v2-2-0; metatarsi: I, II p1-1-0; v1-1-0. GENITALIA: Ventral view: epigynal atrium wider than high, smile shaped, lateral edges rounded, heavily sclerotized processes absent; convoluted duct much thicker than apodemes (figs. 13I, 14F).

OTHER MATERIAL EXAMINED: AUS- TRALIA: Queensland: 2.0 km W Cape Tribulation . Site 4, rainforest, leaf litter, 200 m, 16.08333 ° S, 145.43330 ° E, Sept. 25, 1982 (G. Monteith, D. Yeates, G. Thompson, QM 16063 , PBI _OON 25746), 1 ³, 1 ♀ ; Cape Tribulation, 4.5 km W ( Site 9), rainforest, leaf litter, 760 m, 16.08333 ° S, 145.43330 ° E, Sept. 28, 1982 (G. Monteith, D. Yeates, G. Thompson, QM 16075 , PBI _OON 25743), 2 ³, 2 ♀ ; Cape Tribulation, 5 km W ( Site 10), rainforest, leaf litter, 780 m, 16.08333 ° S, 145.43330 ° E, Sept. 29–30, 1982 (G. Monteith, D. Yeates, G. Thompson, QM S16069 , PBI _OON 25738), 2 ♀ ; Chujeba Peak summit, 7 km SW Redlynch, rainforest, leaf litter, 1000 m, 16.93333 ° S, 145.65000 ° E, Dec. 16, 1989 (G. Monteith, G. Thompson, QM S58115 , PBI _OON 22215), 1 ♀ ; Daintree National Park, Cape Tribulation, on track to Mount Sorrow , rainforest, leaf litter, 600 m, 16.07833 ° S, 145.46166 ° E, Apr. 20, 2009 (H. Wood, CAS 9035020 , PBI _ OON 5629 ), 1 ♀ ; Daintree National Park, Mossman Gorge, water access track, rainforest, leaf litter, 16.47444 ° S, 145.32777 ° E, Apr. 1, 2009 (K. Edward and J. Waldock, QM S95912 ), 2 ³, 2 ♀ ; same data ( WAM T130760 ), 1 ³, 1 ♀ ; Daintree National Park, Mossman Gorge, water access track, rainforest, leaf litter, 16.47444 ° S, 145.32777 ° E, Apr. 1, 2009 (K. Edward and J. Waldock, QM S95913 , PBI _ OON 5671 ), 1 ³ ; Daintree National Park, Mossman Gorge, water access track, rainforest, leaf litter, 16.47444 ° S, 145.32777 ° E, Apr. 1, 2009 (K. Edward and J. Waldock, QM S95914 , PBI _ OON 5672 ), 2 ♀ ; Daintree National Park, western section, Manjal Jimalji trail ‘‘devils thumb,’’ rainforest, leaf litter, 16.38972 ° S, 145.32777 ° E, Apr. 4, 2009 (K. Edward and J. Waldock, QM S95915 ), 1 ♀ ; Daintree National Park, western section, Manjal Jimalji trail ‘‘devils thumb,’’ rainforest, leaf litter, 16.38972 ° S, 145.32777 ° E, Apr. 4, 2009 (K. Edward and J. Waldock, QM S95916 , PBI _ OON 5678 ), 1 ³ ; Daintree National Park, western section, Manjal Jimalji trail ‘‘devils thumb,’’ rainforest, leaf litter, 16.38972 ° S, 145.32777 ° E, Apr. 4, 2009 (K. Edward and J. Waldock, QM S95917 , PBI _ OON 5679 ), 1 ♀ ; Devils Thumb , 10 km NW Mossman, rainforest, leaf litter, 1150 m, 16.38333 ° S, 145.28330 ° E, Oct. 9, 1982 (G. Monteith, D. Yeates, G. Thompson, QM, S16082 , PBI _OON 25811), 1 ³ ; Devils Thumb–Paul’s Luck Site 12, rainforest, 1300 m, 16.38333 ° S, 145.28330 ° E, Dec. 27, 1989, to Jan. 15, 1990 ( ANZSES expedition, QM S33933 , PBI _OON 21752), 1 ³ ; Mossman Bluff Track, 5–10 km W Mossman ( Site 1), rainforest, 250 m, 16.46667 ° S, 145.36670 ° E, Dec. 16–30, 1988 (G. Monteith, G. Thompson, ANZSES, QM S38453 , PBI _OON 22016), 1 ³ ; Mossman Bluff Track, 5–10 km W Mossman ( Site 1), rainforest, 250 m, 16.46667 ° S, 145.36670 ° E, Dec. 16–30, 1988 (G. Monteith, G. Thompson, ANZSES Expedition, QM S33796 , PBI _OON 21732), 1 ³ ; Mossman Gorge National Park , circuit track, rainforest, leaf litter, 16.47222 ° S, 145.33055 ° E, May 21, 2007 (K. Edward and K. Pitz, QM S95918 , PBI _ OON 5568 ), 1 ³ ; Mount Hemmant , rainforest, leaf litter, 1050 m, 16.11667 ° S, 145.41670 ° E, Nov. 27, 1993 (G. Monteith, H. Janetzki, QM S24196 , PBI _OON 21745), 1 ³ ; Mount Hemmant , 6 km SW Cape Tribulation, rainforest, leaf litter, 880 m, 16.11667 ° S, 145.41670 ° E, Apr. 25, 1983 (G. Monteith, D. Cook, QM S12965 , PBI _OON 25742), 1 ³, 1 ♀ ; Mount Misery , summit, rainforest, 850 m, 15.87433 ° S, 145.22200 ° E, Dec. 6, 1990, to Jan. 17, 1991 (QLD Museum, ANZSES, QM S58148 , PBI _OON 22160), 1 ³ ; Mount Pieter-Botte , rainforest, 900 m, 16.07383 ° S, 145.40530 ° E, Nov. 21–Dec. 08, 1993 (G. Monteith, H. Janetzki, QM S34776 , PBI _OON 21963), 1 ³, 1 ♀ .

DISTRIBUTION: This species is only known only from the northern subregions of the Wet Tropics Bioregion (ML, FU, TU, and TL), in northeastern Queensland (map 4).

Figures

Fig. 13. Ischnothyreus comicus, sp. nov. Paratype male (PBI_OON 5671): A. habitus, dorsal view; B. habitus, ventral view; C. habitus, lateral view; G. carapace, anterior view; H. sternum, ventral view. Allotype female (PBI_OON 5672): D. habitus, dorsal view; E. habitus, ventral view; F. habitus, lateral view; I. epigynum, ventral view.

Fig. 14. Ischnothyreus comicus, sp. nov. Holotype male (PBI_OON 25943): A. left palp, prolateral view; B. left palp, retrolateral view; C. left chelicerae, anterior view; D. left chelicerae, posterior view; E. left palp, dorsal view. Allotype female (PBI_OON 25967): F. epigynum, ventral view. Scale lines 5 0.1 mm.