Ischnothyreus collingwoodi, 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 : 87-91

Ischnothyreus collingwoodi , new species Figures 51–52 , map 8

TYPES: AUSTRALIA: Queensland: Male holotype and female allotype from Bellenden Ker Range, Cableway Base Station , 17.26667 ° S, 145.9 ° E, 100 m (17–31 Oct 1981, EARTHWATCH/Qld Museum), deposited in QM (³ holotype: QM S95965 , PBI _ OON 00005890 ; ♀ allotype: QM S95966 , PBI _ OON 00005594 ) .

ETYMOLOGY: The specific name is a patronym in honor of Ludo Collingwood, a world-renowned painter of rainforest creatures occurring in the Wet Tropics Bioregion.

DIAGNOSIS: The male of this species is distinguished by unique modifications of the palpal embolic region, which is enlarged and consists of a stout lateral process that curves around the distal end toward the prolateral aspect (fig. 52E). The distal tip is also curved backward and pointed (fig. 52A, B). The female epyginal region consists of a small triangular projection posterior to the epigynal atrium depression with the sclerotization heavier in the posterior portion, forming a U-shape. A narrow ‘‘necklike’’ structure is evident halfway along convoluted duct, but is not very distinct (figs. 51I, 52F).

MALE (PBI_OON 5890, figs. 51A–C, G– H, 52A–E). Total length 1.70. CEPHALO- THORAX: Carapace pale orange, broadly oval in dorsal view, pars cephalica strongly elevated in lateral view, anteriorly narrowed to between 0.5 and 0.75 times its maximum width, anterolateral corners with slightly sclerotized triangular projections, surface of elevated portion of pars cephalica smooth, sides finely reticulate. Clypeus margin unmodified, curved downward 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, pale orange, uniform; setae light, evenly scattered. Chelicerae, endites, and labium orange-brown. Chelicerae straight, anterior face unmodified, fang normal, basal process small and knoblike; promargin with one or two larger denticles; setae light. Labium elongated hexagon, not fused to sternum, anterior margin indented at middle, much more heavily sclerotized than sternum; with six or more setae on anterior margin. Endites distally not excavated, anteromedian tip with one strong, toothlike projection, much more heavily sclerotized than sternum. ABDOMEN: Ovoid; dorsum soft portions white. Book lung covers elliptical. Dorsal scutum pale orange, covering more than 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 2/3 of abdominal length. Dorsum, epigastric area, and postepigastric area setae light. LEGS: Pale yellow, without color pattern; patella plus tibia I shorter than carapace. Leg spination: femora: I p0-1-2; II p0-0-1; tibiae: I, II p2-2-0; v2-2-0; metatarsi: I, II p1-1-0; v1-1-0. GENITALIA: Palp proximal segments dark red-brown; embolus dark; femur shorter than trochanter, without posteriorly rounded lateral dilation; patella shorter than femur; cymbium dark red-brown; bulb dark red-brown, 1 to 1.5 times as long as cymbium, stout; embolic region, enlarged and clublike, stout lateral process curved around distal end toward prolateral aspect (fig. 52E), distal tip curved backward and pointed (fig. 52A, B).

FEMALE (PBI_OON 5594, figs. 51D–F, I, 52F). Total length 1.95. CEPHALOTHO- RAX: Carapace pars cephalica slightly elevated in lateral view. Sternum longer than wide. Chelicerae, endites, and labium pale orange. ABDOMEN: Dorsal scutum covering 1/2 to 3/4 of abdomen, between 1/4 and 1/2 abdomen width. Postepigastric scutum widely hexagonal, only around epigastric furrow. LEGS: Yellow; patella plus tibia I near as long as carapace. Leg spination: femora: I p0-1-1; II p0-0-1; tibiae: I, II p2-2- 0; v2-2-0; metatarsi: I, II p1-1-0; v1-1-0; 2 smaller spinelike setae on retrolateral aspect of femora I and II. GENITALIA: Ventral view: epigynal atrium with small posterior triangular projection, sclerotization heavier in posterior portion, forming U-shaped depression, narrow ‘‘necklike’’ indents evident halfway along convoluted duct; convoluted duct thicker than apodemes (fig. 52F).

OTHER MATERIAL EXAMINED: AUS- TRALIA: Queensland: Barron Gorge National Park, Stoney Creek Road walk, rainforest, leaf litter, 16.89805 ° S, 145.63972 ° E, Apr. 21, 2009 (K. Edward and P. Cullen, QM S95967 , PBI _ OON 5534 ), 1 ³, 1 ♀ ; Bellenden Ker Range , 0.5 km S Cable tower 7, rainforest, 500 m, 17.26667 ° S, 145.85000 ° E, Nov. 1–7, 1981 (EARTHWATCH/ Qld Museum, QM S27626 , PBI _OON 22147), 3 ³, 16 ♀ ; Bellenden Ker Range , 0.5 km S Cable tower 7, rainforest, 500 m, 17.26667 ° S, 145.85000 ° E, Oct. 17–24, 1981 (EARTH- WATCH/ Qld Museum, QM S27629 , PBI _ OON 22151), 1 ³ ; Bellenden Ker Range, Cableway Base Station , rainforest, leaf litter, 100 m, 17.26667 ° S, 145.90000 ° E, Oct. 17–24, 1981 (EARTHWATCH/ Qld Museum, QM S27758 , PBI _OON 22152), 3 ³, 3 ♀ ; Black Mountain Road, 30 km N. Kuranda , rainforest, leaf mold, rotten wood, 760 m, 16.63166 ° S, 145.46472 ° E, Nov. 4, 1969 (J. G. Brooks, ANIC, PBI _OON 25865), 5 ³, 3 ♀ ; Black Mountain Road, 5 km N Kuranda, rainforest, leaf litter, 360 m, 16.78333 ° S, 145.65000 ° E, June 8, 1980 (G. Monteith, QM S95968 ), 1 ♀ ; Black Mountain Road, 5 km N Kuranda, rainforest, leaf litter, 360 m, 16.78333 ° S, 145.65000 ° E, June 8, 1980 (G. Monteith, QM S16059 , PBI _ OON 5599 ), 1 ♀ ; Black Mountain Road, 5 km N Kuranda, rainforest, leaf litter, 1200 m, 16.78333 ° S, 145.65000 ° E, Dec. 2, 1988 (G. Monteith, G. Thompson, QM S58110 , PBI _OON 22166), 1 ♀ ; Copperlode Dam Road , rainforest, 16.97500 ° S, 145.70833 ° E, July 23–Nov. 26, 1992 (R. Raven, P. Lawless, E. Lawless, M. Shaw, QM S21707 , PBI _OON 22783), 1 ³ ; Crystal Cascades , carpark, rainforest, 16.96667 ° S, 145.67330 ° E, July 23–Nov. 26, 1992 (R. Raven, P. Lawless, E. Lawless, M. Shaw, QM S19986 , PBI _ OON 6432 ), 1 ³ ; Crystal Cascades , carpark, rainforest, 16.96667 ° S, 145.67330 ° E, Oct. 27, 1991, to July 23, 1992 (R. Raven, P. Lawless, M. Shaw, QM S24521 , PBI _OON 21762), 1 ³, 1 ♀ ; Crystal Cascades, via Redlynch , rainforest, leaf litter, 50 m, 16.96666 ° S, 145.70000 ° E, Oct. 21, 1980 (G. Monteith, QM S16014 , PBI _ OON 5614 ), 3 ³, 2 ♀ ; Graham Range , rainforest, 350 m, 17.28333 ° S, 145.95000 ° E, Nov. 1–Dec. 8, 1995 (G. Monteith, G. Thompson, D. Cook, QM S37982 , PBI _OON 21716), 2 ♀ ; Graham Range , rainforest, leaf litter, 550 m, 17.28333 ° S, 145.96670 ° E, Nov. 1, 1995 (G. Monteith, QM S41043 , PBI _OON 21781), 2 ♀ ; Kuranda , rainforest, leaf litter, 430 m, 16.75000 ° S, 145.58333 ° E, July 29, 1977 (R. Taylor, ANIC, PBI _ OON 5613 ), 1 ³, 1 ♀ ; Kuranda National Park, Black Mountain Road , rainforest, leaf litter, 16.64388 ° S, 145.47388 ° E, Apr. 7, 2009 (K. Edward and J. Waldock, QM S95969 , PBI _ OON 5684 ), 2 ³, 1 ♀ ; Kuranda Range Road, 0.5 km up from Henry Ross Lookout, rainforest, 16.83750 ° S, 145.66666 ° E, Oct. 29, 1992, to July 23, 1993 (R. Raven, P. Lawless, M. Shaw, QM S24675 , PBI _OON 22095), 1 ³ ; Kuranda, Black Mountain Road, rainforest, 390 m, 16.76666 ° S, 145.60000 ° E, June 22, 1971 (Taylor and Feehan, ANIC, PBI _ OON 5869 ), 1 ³, 2 ♀ ; Mowbray National Park, Black Mountain Road between Twin Bridge walk and Rifle Creek Road, rainforest, leaf litter, 16.62694 ° S, 145.46138 ° E, Apr. 7, 2009 (K. Edward and J. Waldock, QM S95970 , PBI _ OON 5682 ), 1 ³ ; Mowbray National Park, Black Mountain Road between Twin Bridge walk and Rifle Creek Road, rainforest, leaf litter, 16.62694 ° S, 145.46138 ° E, Apr. 7, 2009 (K. Edward and J. Waldock, QM S95971 , PBI _ OON 5683 ), 1 ♀ ; Mount Murray Prior , rainforest, leaf litter, 770 m, 16.93333 ° S, 145.85000 ° E, Oct. 30, 1995 (G. Monteith, QM S43813 , PBI _OON 22038), 1 ♀ ; Russell River National Park , rainforest, 17.30833 ° S, 145.96250 ° E, Oct. 30, 1991, to June 24, 1992 (P. Lawless, R. Raven, M. Shaw, QM S19914 , PBI _OON 25877), 2 ♀ ; Russell River National Park , rainforest, 17.30833 ° S, 145.96250 ° E, Oct. 30–Nov. 25, 1992 (R. Raven, P. Lawless, E. Lawless, M. Shaw, QM S21752 , PBI _OON 25921), 1 ♀ ; Saddle Mountain summit, rainforest, leaf litter, 650 m, 16.81667 ° S, 145.66670 ° E, Nov. 21, 1994 (G. Monteith, QM S27968 , PBI _OON 21775), 3 ³ ; Saddle Mountain summit, rainforest, leaf litter, 650 m, 16.81667 ° S, 145.66670 ° E, Nov. 21, 1994 (G. Monteith, QM S27962 , PBI _OON 21960), 5 ♀ .

DISTRIBUTION: This species is known only from four central subregions of the Wet Tropics Bioregion (BMC, LU, BK, MT), in northeastern Queensland (map 8).

Figures

Fig. 51. Ischnothyreus collingwoodi, sp. nov. Holotype male (PBI_OON 00005890): A. habitus, dorsal view; B. habitus, ventral view; C. habitus, lateral view; G. carapace, anterior view; H. sternum, ventral view. Allotype female (PBI_OON 00005594): D. habitus, dorsal view; E. habitus, ventral view. F. habitus, lateral view; I. epigynum, ventral view.

Fig. 52. Ischnothyreus collingwoodi, sp. nov. Holotype male (PBI_OON 00005890): 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 00005594): F. epigynum, ventral view. Scale lines 5 0.1 mm.