Cavisternum ewani, Baehr & Harvey & Smith, 2010

Baehr, Barbara C., Harvey, Mark S. & Smith, Helen M., 2010, The Goblin Spiders of the New Endemic Australian Genus Cavisternum (Araneae: Oonopidae), American Museum Novitates 3684, pp. 1-40: 22-25

publication ID

http://doi.org/ 10.1206/667.1

persistent identifier

http://treatment.plazi.org/id/03A08799-656A-CE30-FD7F-FA3CE8F8AB92

treatment provided by

Carolina

scientific name

Cavisternum ewani
status

new species

Cavisternum ewani   , new species

Figures 2, 5, 8 View Figs , 103–114 View Figs View Figs View Figs , map 3

TYPES: AUSTRALIA: Queensland: Male holotype from Great Basalt Walls National Park , 19 ° 14 9 33 0 S, 146 ° 28 9 22 0 E, pitfall trap array, open forest, 420 m (27 Sept.–17 Dec. 2006, R. Raven, B. Baehr) (PBI_OON 00006013), deposited in QM ( S81339 View Materials ) GoogleMaps   . Female allotype from Rochford Scrub , 20 ° 06 9 58 0 S, 146 ° 35 9 38 0 E, pitfall (11 Dec. 2006 – 11 Feb. 2007, R. Raven, B. Baehr, A. Amey) (PBI_OON 00006276), deposited in QM ( S76771 View Materials ) GoogleMaps   . Paratypes: 4 males from Lords Table , SE base, site 2, 22 ° 40 9 30 0 S, 148 ° 01 9 12 0 E, 13 Jan. 2006, C. Burwell, 1 male deposited in each of AM (PBI_OON 00023369, KS106292 View Materials ) GoogleMaps   , AMNH (PBI_OON 00023370), WAM (PBI_OON 00023371, T95023 View Materials )   , remain- der in QM (PBI_OON 00021624, S73500 View Materials )   .

ETYMOLOGY: The specific name is a patronym in honor of Ewan Jay Martyr McLean, the son of Stacey McLean, Senior Program Officer, Biodiversity Planning, Environment and Parks Branch, Brisbane City Council.

DIAGNOSIS: Males of C. ewani   resemble those of C. toadshow   with the sternal concavity occupying most of the sternal length, and the epigastric scutum not protruding (fig. 5). However, males of C. ewani   can be easily separated from all other species by their broad field of clavate setae covering almost the whole width of the sternum (fig. 8). Females can be easily distinguished from all other Cavisternum species   by their large elliptical membranous epigastric area (fig. 113).

MALE: Total length 1.07. Carapace 0.50 long, 0.39 wide; abdomen 0.57 long, 0.33 wide. Carapace, sternum, mouthparts, and abdominal scutae pale orange, legs yellow. Sternum longer than wide, median concavity occupying most of sternal length, with U-shaped field of

Dorsal view. 111. Retrolateral view. 112. Embolus, retrolateral view. Scales: 20 m m.

clavate setae, anterior margin of setae rectangular (fig. 8). Chelicerae slightly divergent, fangs, extremely long, slightly longer than paturon, directed posteriorly and crossed (figs. 106, 107). Abdomen ovoid. Epigastric scutum not protruding (fig. 5). Cymbium-bulb complex pear shaped, bearing a long, thin, medially bent embolus at its apex (figs. 109–112).

FEMALE: Total length 1.21. Carapace 0.46 long, 0.38 wide; abdomen 0.75 long, 0.32 wide. Coloration as in male. Epigastric fold with one large elliptical area, copulatory duct narrow in the middle and widened at both ends (figs. 113, 114).

OTHER MATERIAL EXAMINED: AUSTRALIA: Queensland: 16 km N of Warremba , 24 ° 54 9 09 0 S, 148 ° 35 9 36 0 E, 331 m, 27 June–6 Sep. 2006, R. Raven, B. Baehr, A. Amey, 1 ³ (PBI_OON 00006214, QM S75256 View Materials ) GoogleMaps   ; 19 km NW of Wrotham Park Stn, Burketown Dvt Road , 16 ° 31 9 43 0 S, 143 ° 53 9 38 0 E, 188 m, 12 July–26 Sep. 2006, R. Raven, B. Baehr, A. Amey, 1 ³ (PBI_OON 00006156, QM S75182 View Materials ) GoogleMaps   . Dunbar E of Lynd River on Burketown Dvt Road, 16 ° 21 9 48 0 S, 143 ° 03 9 11 0 E, 91 m, 12 July–26 Sep. 2006, R. Raven, B. Baehr, A. Amey, 2 ³ (PBI_OON 00006237, QM S75305 View Materials ) GoogleMaps   . Killymoon Creek , S of Townsville, 19 ° 24 9 S, 147 ° 01 9 E, 27 July–2 Dec. 1992, R. Raven, P. Lawless, E. Lawless, M. Shaw, 1 ³ (PBI_OON 00020956, QM S75577 View Materials ) GoogleMaps   , 26 Oct. 1991 – 27 July 1992, 1 ³, 1 ♀ (PBI_OON 00020998, QM S79583 View Materials )   . Lake Broadwater via Dalby , 27 ° 21 9 S, 151 ° 06 9 E ° E, 17 May–25 Nov. 1985, M. Bennie, 1 ³ (PBI_OON 00020832, QM S79449 View Materials ) GoogleMaps   . Lords Table , SE base, site 2, 22 ° 40 9 30 0 S, 148 ° 01 9 12 0 E, 13 Jan. 2006, C. Burwell, 1 ³ (PBI_OON 00020038, QM S80257 View Materials ) GoogleMaps   , 1 ³ (PBI_OON 00020045, QM S73497 View Materials )   . Red Falls , 19 ° 55 9 47 0 S, 145 ° 44 9 00 0 E, 360 m, 16 Dec. 2006, R. Raven, B. Baehr, A. Amey, 1 ³ (PBI_OON 00006012, QM S81342 View Materials ) GoogleMaps   . Roper Creek, via Coomburragee , site 3, 22 ° 54 9 16 0 S, 148 ° 20 9 00 0 E, 300 m, 11 Jan. 2006, C. Burwell, 1 ³ (PBI_OON 00020031, QM S80091 View Materials ) GoogleMaps   . SW along Alternate Savannah Way , SE of Chillagoe, 17 ° 29 9 30 0 S, 144 ° 36 9 53 0 E, 460 m, 13 July–27 Sep. 2006, R. Raven, B. Baehr, A. Amey, 1 ³ (PBI_OON 00006072, QM S75099 View Materials ) GoogleMaps   ; same data but 2 ³, 1 ♀ (PBI_OON 00023368, AM KS106290 View Materials , one male used for SEM). Taroom district BS 24, 25 ° 35 9 59 0 S, 149 ° 46 9 11 0 E, June – 11 Sep. 1996, P. Lawless, H. Janetzki, D. Cook, 1 ³ (PBI_OON 00006976, QM S72962 View Materials ) GoogleMaps   .

DISTRIBUTION: This species is widely distributed in drier areas of eastern Queensland (map 3).

Kingdom

Animalia

Phylum

Arthropoda

Class

Arachnida

Order

Araneae

Family

Oonopidae

Genus

Cavisternum