Ischnothyreus crenulatus, 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: 62-74

publication ID

http://doi.org/ 10.1206/865.1

persistent identifier

http://treatment.plazi.org/id/E466E016-FF95-FFF7-FD32-7C213D9FFC95

treatment provided by

Felipe

scientific name

Ischnothyreus crenulatus
status

new species

Ischnothyreus crenulatus   , new species Figures 33–42 View Fig View Fig View Fig View Fig View Fig View Fig View Fig View Fig View Fig View Fig , map 7

TYPES: AUSTRALIA: Queensland: Male holotype and female allotype from Mount

Hypipamee National Park , 17.43333 ° S, 145.4833 ° E, 950 m (5 Oct 1980, G. Monteith), deposited in QM (³ holotype: QM S95937 View Materials , PBI _ OON 00025966; ♀ allotype: QM S95938 View Materials , PBI _ OON 00025754) GoogleMaps   .

ETYMOLOGY: The specific epithet is derived from the Latin crenala meaning ‘‘little rounded projection’’ ( Brown, 1956), and refers to the stout digitiform subdistal projection on the male palpal bulb.

DIAGNOSIS: The male of this species exhibits heavily sclerotized labium and endites (fig. 33H) and can be distinguished from other species by the presence of a subdistal modification that is divided into two, with a digitiform process projected laterally (figs. 33H, 42A, B, E). The epigynal atrium of the female appears heart shaped and the depressions almost in the shape of wings either side of medial extension of the cuticle (figs. 33I, 42).

MALE (PBI_ OON 25966 View Materials , figs. 33A–C, G– H, 42A–E; paratype ³, figs. 34, 36–38A–D, 39B–F, 40C–F, 41C–F). Total length 1.56. CEPHALOTHORAX: Carapace pale orange– olive brown, broadly oval in dorsal view, pars cephalica strongly elevated in lateral view (fig. 34A), 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 (fig. 34B). Clypeus margin unmodified, curved downward in front view, low, ALE separated from edge of carapace by less than their radius (fig. 34D); setae light. Eyes: ALE largest, ALE circular, PME circular, PLE oval; posterior eye row straight from above; ALE touching, ALE-PLE touching. Sternum as long as wide, pale orange, darker anteriorly near labium forming unique shape, the base of which has large patch of 26 fine setae (fig. 33H); setae dark, evenly scattered. Chelicerae, endites, and labium dark redbrown. Chelicerae slightly divergent, anteri- or face unmodified; promargin with one or two larger denticles; fang normal, without prominent basal process (fig. 37A–D); setae dark. 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 (figs. 36B, C, 37E). Endites 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 to olive brown, covering more than 3/4 of abdomen, more than 1/2 to most of abdo- men width, middle surface smooth, sides smooth. Epigastric scutum small lateral sclerites absent. Postepigastric scutum pale orange, covering about 3/4 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 p0-1-1; 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 dark redbrown; embolus dark, femur shorter than trochanter; patella about as long as femur; tibia with three trichobothria; cymbium dark red-brown; bulb dark red-brown, more than two times as long as cymbium, stout, tapering apically; embolic region not obtusely bent at right angle, with complex modifications, subdistal digitiform process projected laterally (figs. 36E, F, 42A, B, E); apparent embolus opening at distal tip, excavated (fig. 36F).

FEMALE ( PBI _ OON 25754 View Materials , figs. 33D–F, I, 42F; paratype ♀, figs. 35, 38E, F, 39A, 40A, B, 41A, B). Total length 1.80. CEPHALO- THORAX: Carapace pars cephalica slightly elevated in lateral view. Sternum longer than wide. Chelicerae, endites, and labium pale orange. ABDOMEN: 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 heart shaped, depressions almost wing shap- ed either side of anterior necklike indents; convoluted duct thicker than apodemes (figs. 33I, 42F).

OTHER MATERIAL EXAMINED: AUS- TRALIA: Queensland: 3 km W of Bones Knob , rainforest, 1140 m, 17.23333 ° S, 145.41670 ° E, Dec. 10, 1995, to Feb. 09, 1996 (G. Monteith, D. Cook, G. Thompson, QM S43353 View Materials , PBI _ OON 21793 View Materials ), 1 ³ GoogleMaps   ; Baldy Mountain, SW. of Atherton , rainforest, leaf litter, 1200 m, 17.26666 ° S, 145.41666 ° E, Oct. 10, 1980 (G. Monteith, QM S12956 View Materials , PBI _ OON 25792 View Materials ), 1 ³, 3 ♀ GoogleMaps   ; Baldy Mountain, SW. of Atherton , rainforest, leaf litter, 1200 m, 17.26666 ° S, 145.41666 ° E, Oct. 10, 1980 (G. Monteith, QM S12966 View Materials , PBI _ OON 25795 View Materials ), 1 ³, 1 ♀ GoogleMaps   ; Baldy Mountain Road, SW Atherton, rainforest, leaf litter, 1150 m, 17.26667 ° S, 145.41670 ° E, Dec. 9, 1988 (G. Monteith, G. Thompson, QM S59270 View Materials , PBI _ OON 22130 View Materials ), 1 ³, 2 ♀ GoogleMaps   ; Boonjee, near Malanda , rainforest, leaf litter, 700 m, 17.40000 ° S, 145.73330 ° E, Dec. 8, 1988 (G. Monteith, G. Thompson, QM S58088 View Materials , PBI _ OON 25938 View Materials ), 1 ³ GoogleMaps   ; Evelyn River, SE Herberton , rainforest, leaf litter, 17.53333 ° S, 145.33333 ° E, Aug. 29, 1977 (A. Walford- Huggins, ANIC, PBI _ OON 25787 View Materials ), 1 ³, 2 ♀ GoogleMaps   ; Herberton Range State Forest, Forestry track, rainforest, leaf litter, 17.27111 ° S, 145.42277 ° E, Apr. 23, 2009 (K. Edward and P. Cullen, QM S95939 View Materials , PBI _ OON 5536), 1 ³ GoogleMaps   ; Herberton Range State Forest, Forestry track, rainforest, leaf litter, 17.28805 ° S, 145.42138 ° E, Apr. 24, 2009 (K. Edward and P. Cullen, QM S95940 View Materials , PBI _ OON 5563), 2 ³, 2 ♀ GoogleMaps   ; Herberton Range State Forest, Forestry track, rainforest, leaf litter, 17.28805 ° S, 145.42722 ° E, Apr. 24, 2009 (K. Edward and P. Cullen, QM S95941 View Materials , PBI _ OON 26314 View Materials ), 3 ³, 1 ♀ GoogleMaps   ; same data ( WAM T130761 View Materials ), 2 ³, 1 ♀ GoogleMaps   ; Lake Barrine , rainforest, leaf litter, 750 m, 17.25000 ° S, 145.63330 ° E, Oct. 4, 1980 (G. Monteith, QM S12973 View Materials , PBI _ OON 25790 View Materials ), 1 ³, 1 ♀ GoogleMaps   ; Lake Barrine , rainforest, leaf litter, 750 m, 17.25000 ° S, 145.63330 ° E, Oct. 8, 1980 (G. Monteith, QM S12960 View Materials , PBI _ OON 25794 View Materials ), 2 ♀ GoogleMaps   ; Longlands Gap State Forest , forest, 17.45500 ° S, 145.47420 ° E, July 23– Nov. 26, 1992 (R. Raven, P. Lawless, E. Lawless, M. Shaw, QM S19940 View Materials , PBI _ OON 21966 View Materials ), 7 ³, 1 ♀ GoogleMaps   ; Maalan Road , 1.5 km S Palmerston highway, rainforest, leaf litter, 750 m, 17.60000 ° S, 145.70000 ° E, Nov. 26, 1994 (G. Monteith, QM S46946 View Materials , PBI _ OON 21780 View Materials ), 1 ♀ GoogleMaps   ; Maalan Road , 2 km S Palmerston highway, rainforest, 750 m, 17.60000 ° S, 145.70000 ° E, Nov. 26, 1994, to Jan. 10, 1995 (G. Monteith, J. Hasenpusch, QM S32437 View Materials , PBI _ OON 22061 View Materials ), 2 ³, 1 ♀ GoogleMaps   ; Millaa Millaa Falls , rainforest, leaf litter, 800 m, 17.46667 ° S, 145.60000 ° E, May 17, 1995 (G. Monteith, QM S43871 View Materials , PBI _ OON 22025 View Materials ), 2 GoogleMaps  

Map 7. Map of northeastern Queensland, central Wet Tropics Bioregion, showing recorded distributions of Ischnothyreus crenulatus   (+), I. ovinus   (N) and I. bualveus   (Z). Wet Tropics upland subregions outlined in grey (see map 1).

♀; Mount Fisher , 7 km SW Millaa Millaa, Kjellberg Road, rainforest, leaf litter, 1000 m, 17.55000 ° S, 145.56670 ° E, May 3, 1983 (G. Monteith, D. Yeates, QM S16091 View Materials , PBI _ OON 25789 View Materials ), 1 ♀ GoogleMaps   ; Mount Hypipamee National Park , 14 km SW Malanda, rainforest, 950 m, 17.43333 ° S, 145.48333 ° E, July 24–Aug. 2, 1982 (S. and J. Peck, AMNH, PBI _ OON 5303), 1 ♀ GoogleMaps   ; Mount Hypipamee National Park , 14 km SW Malanda, rainforest, leaf litter, 950 m, 17.43333 ° S, 145.48333 ° E, July 24–Aug. 2, 1982 (S. and J. Peck, AMNH, PBI _ OON 5304), 1 ³, 1 ♀ GoogleMaps   ; Mount Hypipamee National Park , walking track to crater, rainforest, leaf litter, 17.42361 ° S, 145.48500 ° E, Apr. 29, 2009 (K. Edward and P. Cullen, QM S95942 View Materials , PBI _ OON 5555), 1 ♀ GoogleMaps   ; Mount Hypipamee National Park , rainforest, leaf litter, 950 m, 17.43333 ° S, 145.48330 ° E, Oct. 5, 1980 (G. Monteith, QM S12970 View Materials , PBI _ OON 25793 View Materials ), 1 ♀ GoogleMaps   ; Palmerston National Park , rainforest, 670 m, 17.58834 ° S, 145.70000 ° E, Nov. 30, 1992, to Apr. 15, 1993 (R.J. and S. Raven, P. and E. Lawless, QM S22948 View Materials , PBI _ OON 21670 View Materials ), 5 ³, 1 ♀ GoogleMaps   ; Palmerston National Park (NQ 11b), rainforest, 670 m, 17.58834 ° S, 145.70000 ° E, July 25–30, 1992 (R. Raven, P. Lawless, E. Lawless, M. Shaw, QM S21922 View Materials , PBI _ OON 21669 View Materials ), 6 ³, 2 ♀ GoogleMaps   ; Palmerston National Park (NQ 11b), rainforest, 670 m, 17.58834 ° S, 145.70000 ° E, July 25–Nov. 30, 1992 (R. Raven, P. Lawless, E. Lawless, M. Shaw, QM S24436 View Materials , PBI _ OON 21712 View Materials ), 2 ³, 1 ♀ GoogleMaps   ; Palmerston National Park (NQ 11b), rainforest, 670 m, 17.58834 ° S, 145.70000 ° E, Oct. 30, 1991, to July 24, 1992 (R. Raven, P. Lawless, M. Shaw, QM S24727 View Materials , PBI _ OON 22140 View Materials ), 13 ³ GoogleMaps   ; Plath Road , rainforest, leaf litter, 1150 m, 17.37667 ° S, 145.46170 ° E, Nov. 30, 1997 (G. Monteith, QM S43010 View Materials , PBI _ OON 21765 View Materials ), 2 ♀ GoogleMaps   ; Tully Falls State Forest , rainforest, leaf litter, 17.62472 ° S, 145.59361 ° E, Oct. 4, 1978 (A. Walford- Huggins, ANIC, PBI _ OON 25788 View Materials ), 1 ³, 1 ♀ GoogleMaps   ; Tully Gorge National Park , start of Rhyolite Pinnacle trail, rainforest, leaf litter, 17.69500 ° S, 145.52333 ° E, Apr. 28, 2009 (K. Edward and P. Cullen, QM S95943 View Materials , PBI _ OON 5556), 1 ³ GoogleMaps   ; Tully Gorge National Park , start of Rhyolite Pinnacle trail, rainforest, leaf litter, 17.69500 ° S, 145.52333 ° E, Apr. 28, 2009 (K. Edward and P. Cullen, QM S95944 View Materials , PBI _ OON 26313 View Materials ), 1 ♀ GoogleMaps   .

DISTRIBUTION: This species is known only from the Atherton Tableland (AU subregion), of the Wet Tropics Bioregion, in northeastern Queensland (map 7).

QM

Queensland Museum

ANIC

Australian National Insect Collection

WAM

Western Australian Museum

AMNH

American Museum of Natural History