Ischnothyreus boonjee, 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 : 60-62

Ischnothyreus boonjee , new species Figures 31–32 , map 6

TYPES: AUSTRALIA: Queensland: Male holotype from Boonjee State Forest, 17.4 ° S, 145.7333 ° E, 700 m (3–6 Apr. 1978, R. Raven, V. Davies), deposited in QM ( S16143 , PBI_OON 00025964). Female allotype from Boonjee, 13 km ESE Malanda, 17.41666 ° S, 145.75 ° E, 700 m (8 Dec. 1988, G. Monteith, G. Thompson), deposited in QM ( S58089 , PBI_OON 00022176).

ETYMOLOGY: The specific epithet is a noun in apposition, taken from the type locality.

DIAGNOSIS: This species can easily be distinguished by the striking modifications of the embolic region of the male pedipalp, which is extremely large, split into numerous structures, and triangular in shape dorsally (figs. 31F, 32A, B, E). The female epigynal region is similar to that of I. digitus , sp. nov., but differs in an extremely elongate, vaseshaped epigynal atrium, and the duct is always convoluted (figs. 31D, 32F).

MALE (PBI_OON 25964, figs. 31E, F, 32A–E). Total length 1.58. CEPHALOTHO- RAX: Carapace pale orange, ovoid in dorsal view, pars cephalica strongly 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. Clypeus margin unmodified, curved downward in front view, low, ALE separated from edge of carapace by less than their radius; setae dark. Eyes: ALE largest, ALE circular, PME oval, PLE oval; posterior eye row straight from above; ALE touching, ALE-PLE touching. Sternum longer than wide, pale orange, uniform; setae dark, evenly scattered. Chelicerae, endites, and labium dark red-brown. Chelicerae slightly divergent, anterior face unmodified; promargin with one larger denticle; fang shape normal, without prominent basal process; 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 anteromedian tip with one strong, toothlike projection, much more heavily sclerotized than sternum. ABDOMEN: Ovoid; dorsum soft portions white. Book lung covers ovoid. 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 dark. LEGS: Yellow, 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. GENITALIA: Palp proximal segments dark red-brown; embolus dark; femur shorter than trochanter; patella about as long as femur; cymbium dark red-brown; bulb dark red-brown, more than two times as long as cymbium, palpal bulb slender; embolic region extremely enlarged, split into numerous structures, triangular in dorsal view (figs. 31F, 32E).

FEMALE (PBI_OON 22176, figs. 31A–D, 32F). Total length 2.01. CEPHALOTHO- RAX: Carapace pars cephalica slightly elevated in lateral view. Sternum as long as wide. Chelicerae, endites, and labium pale orange. Chelicerae straight. ABDOMEN: Dorsal scutum covering less than 1/2 of abdomen, between 1/4 and 1/2 abdomen width. Epigastric scutum small lateral sclerites present. 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 extremely elongate, vase shaped, anterior portion with necklike indents; convoluted duct thicker than apodemes, convoluted along entire length (figs. 31D, 32F).

OTHER MATERIAL EXAMINED: AUS- TRALIA: Queensland: 6 km E of Butchers Creek School , rainforest, leaf litter, 720 m, 17.36666 ° S, 145.68330 ° E, Oct. 9, 1980 (G. Monteith, QM S12992 , PBI _OON 25761), 2 ♀ ; Boonjee SF, 700 m, 17.40000 ° S, 145.73330 ° E, Apr. 3–6, 1978 (R. Raven, V. Davies, QM S16143 , PBI _OON 25758), 2 ♀ ; Boonjee, nr Malanda , rainforest, 700 m, 17.40000 ° S, 145.73330 ° E, Dec. 8, 1988 (G. Monteith, G. Thompson, QM S58088 , PBI _ OON 25937), 1 ³ ; Wooroonooran National Park, Mount Bartle Frere , western side on track to summit, rainforest, leaf litter, 1000 m, 17.37833 ° S, 145.785778 ° E, Apr. 23, 2009 (H. Wood, CASENT 9035057, PBI _ OON 5632 ), 4 ♀ ; Wooroonooran National Park, Mount Bartle Frere , western side on track to summit, rainforest, leaf litter, 1000 m, 17.37833 ° S, 145.785778 ° E, Apr. 23, 2009 (H. Wood, CASENT 9035058, PBI _ OON 5634 ), 1 ³, 2 ♀ .

DISTRIBUTION: This species is known only from the eastern region of the Atherton

Figures

Fig. 31. Ischnothyreus boonjee, sp. nov. Allotype female (PBI_OON 00022176): A. habitus, dorsal view; B. habitus, ventral view; C. habitus, lateral view; D. epigynum, ventral view. Holotype male (PBI_OON 00025964): E. habitus, ventral view; F. sternum, ventral view.

Fig. 32. Ischnothyreus boonjee, sp. nov. Holotype male (PBI_OON 00025964): 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 00022176): F. epigynum, ventral view. Scale lines 5 0.1 mm.