Ischnothyreus cornuatus, 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: 74-76

publication ID 10.1206/865.1

persistent identifier

treatment provided by


scientific name

Ischnothyreus cornuatus

new species

Ischnothyreus cornuatus   , new species Figures 43–44 View Fig View Fig , map 8

TYPES: AUSTRALIA: Queensland: Male holotype and female allotype from 21 km S Atherton, 17.45 ° S, 145.4667 ° E, 1070 m (5 Nov. 1983, D. Yeates, G. Thompson), deposited in QM (³ holotype: QM S16023 View Materials , PBI _ OON 00025944; ♀ allotype: QM S16023 View Materials , PBI _ OON 00025757) GoogleMaps   .

ETYMOLOGY: The specific epithet is of the Latin cornuatus   meaning ‘‘hornlike’’ ( Brown, 1956), and refers to the distal hornlike processes on the male palp.

DIAGNOSIS: The male of this species exhibits a striking modification of the embolic region of the male pedipalp, with one larger and one smaller hornlike process directed dorsally (fig. 44A, B). The female epigynal region has paired cup-shaped epigynal atriums that are large and possess thicker sclerotization at the lateral edges (figs. 43I, 44F).

MALE (PBI_ OON 25944 View Materials , figs. 43A–C, G– H, 44A–E). Total length 1.50. CEPHALO- THORAX: Carapace orange, broadly oval in dorsal view, pars cephalica strongly elevated in lateral view, anteriorly narrowed to 0.49 times its maximum width or less, anterolateral corners with slightly sclerotized triangular projections, surface of elevated portion of pars cephalica finely reticulate, sides strongly reticulate. Clypeus margin unmodified, straight 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 pale orange. Chelicerae slightly divergent, anterior face unmodified; promargin with one larger denticle; fang normal, without prominent basal process. Labium elongated hexagon, not fused to sternum, anterior margin indented at middle, slightly stronger sclerotization at base; with six or more setae on anterior margin. Endites anteromedian tip with one strong, toothlike projection, slightly stronger sclerotization than sternum. ABDO- MEN: 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 1/2 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 p0-2-0; 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 shorter than femur; cymbium dark red-brown; bulb dark red-brown, more than 2 times as long as cymbium, elongate; embolic region with two hornlike processes, one large and one small, both directed dorsally (fig. 44A, B).

FEMALE (PBI_ OON 25757 View Materials , figs. 43D–F, I, 44F). Total length 1.73. ABDOMEN: Dorsal scutum covering 1/2 to 3/4 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: Pale orange. Leg spination: femora: I p0-2-0; 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 paired, cup shaped, sclerotization heavier at lateral edges; convoluted duct very long, thicker than apodemes, ending posteriorly at small cresent-shaped indent (figs. 43I, 44F).

OTHER MATERIAL EXAMINED: AUS- TRALIA: Queensland: 21 km S Atherton , rainforest, leaf litter, 1070 m, 17.45000 ° S, 145.46670 ° E, Nov. 5, 1983 (D. Yeates, G. Thompson, QM S16022 View Materials , PBI _ OON 25797 View Materials ), 1 ³ GoogleMaps   ; Millaa Millaa Lookout , rainforest, 1000 m, 17.51667 ° S, 145.56670 ° E, Dec. 1, 1993, to Feb. 25, 1994 (J. Hasenpusch, QM S49694 View Materials , PBI _ OON 22107 View Materials ), 1 ³ GoogleMaps   ; Mount Fisher , 1150 m, 17.33000 ° S, 145.32000 ° E, May 3–June 2, 1995 (P. Zborowski, ANIC, PBI _ OON 5847), 1 ♀ GoogleMaps   ; Mount Fisher ( Kjelberg ), rainforest, leaf litter, 1100 m, 17.53333 ° S, 145.55000 ° E, May 18, 1995 (G. Monteith, QM S41902 View Materials , PBI _ OON 21955 View Materials ), 1 ♀ GoogleMaps   ; Mount Fisher, 7 km SW. of Millaa Millaa , rainforest, leaf litter, 1100 m, 17.55000 ° S, 145.55000 ° E, Apr. 27, 1982 (G. Monteith, D. Yeates, D. Cook, QM S12995 View Materials , PBI _ OON 25799 View Materials ), 1 ³ GoogleMaps   ; Tower nr the Crater , rainforest, leaf litter, 1230 m, 17.45000 ° S, 145.48330 ° E, Nov. 23, 1994 (G. Monteith, QM S31611 View Materials , PBI _ OON 22177 View Materials ), 1 ♀ GoogleMaps   ; Tower nr the Crater National Park , rainforest, 1230 m, 17.45000 ° S, 145.48330 ° E, Nov. 25, 1994, to Jan. 10, 1995 (G. Monteith, J. Hasenpusch, QM S46987 View Materials , PBI _ OON 21982 View Materials ), 3 ³, 2 ♀ GoogleMaps   .

DISTRIBUTION: This species is known only from the Atherton Tableland (AU subregion), of the Wet Tropics Bioregion, in northeastern Queensland (map 8).


Queensland Museum


Australian National Insect Collection