Ischnothyreus eungella, 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 : 139-142

Ischnothyreus eungella , new species Figures 76–77 , map 11

TYPES: AUSTRALIA: Queensland: Male holotype and female allotype from Eungella National Park, Cedar Grove Track , 21.13555 ° S, 148.49805 ° E (14 May 2007, K. Edward and K. Pitz), deposited in QM (³ holotype: QM S96012 , PBI _ OON 00025722 ; ♀ allotype: QM S96013 , PBI _ OON 00025721 ) .

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

DIAGNOSIS: The carapace and dorsal scutes of this species are pale yellow-green in coloration. Males can be easily distinguished by the extremely large and long palpal embolic region that broadens to a fan shape distally (fig. 77A, B). Females are equally distinct with a very large epigynal atrium, which is wider at the posterior edge. Weak horizontal sclerotization is present from the anterior edge of the epigynal atrium and extends to the small lateral apodemes (fig. 77E).

MALE (PBI_OON 25722, figs. 76A–C, G– H, 77A–D). Total length 1.43. CEPHALO- THORAX: Carapace yellow, 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 without extension or projections, surface of elevated portion of pars cephalica finely reticulate, sides strongly reticulate. Clypeus margin unmodified, straight in front view, high, ALE separated from edge of carapace by their radius or more; 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, yellow, uniform; setae dark, evenly scattered. Chelicerae, endites, and

labium orange-brown. Chelicerae straight, anterior face unmodified; promargin one or two slightly larger denticles; fang shape normal, with very small basal process; setae dark. Labium elongated hexagon, not fused to sternum, anterior margin indented at middle, slightly stronger sclerotization than sternum; with six or more setae on anterior margin, subdistal portion with unmodified setae. Endites anteromedian tip with one strong, toothlike projection, slightly more heavily sclerotized than sternum. ABDO- MEN: Ovoid; dorsum soft portions white. Book lung covers elliptical. Dorsal scutum yellow, 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 present. Postepigastric scutum yellow, covering about 2/3 of abdominal length. Dorsum, epigastric area, and postepigastric area setae dark. LEGS: Pale orange, without color pattern; patella plus tibia I shorter than carapace. Leg spination: femora: I p0-2-0; II p2-2-0; v2-2-0; patellae: II p1-1-0; v1-1-0; tibiae: I p2-2-0; v2- 2-0; metatarsi: I p1-1-0; v1-1-0; tarsi: I p0-1-0. GENITALIA: Palp proximal segments dark red-brown; embolus dark; femur shorter than trochanter; patella shorter than femur; cymbium dark red-brown; bulb dark red-brown, more than two times as long as cymbium, stout; embolic region extremely large, elongate, broadening to fan-shaped tip, obtusely bent back toward cymbium (fig. 77A, B).

FEMALE (PBI_OON 25721, figs. 76D–F, I, 77E). Total length 1.43. CEPHALOTHO- RAX: Carapace pars cephalica slightly elevated in lateral view, anteriorly narrowed to 0.49 times its maximum width or less, sides finely reticulate. Clypeus curved downward in front view, low, ALE separated from edge of carapace by less than their radius. Chelicerae, endites, and labium yellow. ABDOMEN: Dorsal scutum covering 1/2 to 3/4 of abdomen, between 1/4 and 1/2 abdomen width. Postepigastric scutum pale orange, widely hexagonal, covering about 1/3 of the abdominal length. LEGS: Leg spination: femora: I p0-2-0; II p2-2-0; v2-2-0; patellae: II p1-1-0; v1-1-0; tibiae: I p2-2-0; v2-2-0; metatarsi: I p1- 1-0; v1-1-0; tarsi: I p0-1-0. GENITALIA: Ventral view: epigynal atrium very large, posterior section wider than anterior, with rounded edges; without heavily sclerotiz- ed overhanging processes; convoluted duct thicker than apodemes, stout (fig. 76F, 77E).

OTHER MATERIAL EXAMINED: AUS- TRALIA: Queensland: Eungella National Park, Finch Hatton Gorge (NQ 37), 21.07166 ° S, 148.63830 ° E, Dec. 3, 1992, to Apr. 23, 1993 (R.J. and S. Raven, P. and E. Lawless, QM S24627 , PBI _OON 21690), 2 ³ ; Finch Hatton National Park , 350 m, 21.15000 ° S, 148.63330 ° E, Feb. 14, 1986 (R. Raven, J. Gallon, QM S9937 , PBI _OON 21962), 3 ³ .

DISTRIBUTION: This species is known only from Eungella National Park, in northeastern Queensland (map 11).

Figures

Fig. 76. Ischnothyreus eungella, sp. nov. Holotype male (PBI_OON 00025722): A. habitus, dorsal view; B. habitus, ventral view; C. habitus, lateral view; G. carapace, anterior view; H. sternum, ventral view. Allotype female (PBI_OON 00025721): D. habitus, dorsal view; E. habitus, ventral view; F. habitus, lateral view; I. epigynum, ventral view.

Fig. 77. Ischnothyreus eungella, sp. nov. Holotype male (PBI_OON 00025722): A. left palp, prolateral view; B. left palp, retrolateral view; C. left chelicerae, anterior view; D. left chelicerae, posterior view. Allotype female (PBI_OON 00025721): E. epigynum, ventral view. Scale lines 5 0.1 mm.