The Goblin Spiders of the New Endemic Australian Genus Cavisternum (Araneae: Oonopidae) Author Baehr, Barbara C. Author Harvey, Mark S. Author Smith, Helen M. text American Museum Novitates 2010 2010-03-04 3684 1 40 http://www.bioone.org/doi/abs/10.1206/667.1 journal article 10.1206/667.1 0003-0082 5358760 C6A064BB-45E2-494A-935D-D7797D6E7BCC Cavisternum bertmaini , new species Figures 12 , 90–94 , map 1 TYPES: AUSTRALIA : Western Australia : Male holotype from Cape Bougainville , site 6/ 2 (FN7), 13 ° 54 9 S , 126 ° 05 9 E ( 10 June 1988 , Figs. 87–89. Cavisternum barthorum , new species , male palp (PBI_OON 06073). 87. Prolateral view. 88. Retrolateral view. 89. Dorsal view. A.R. Main ) (PBI_OON 00005440), deposited in WAM T90/974. Female allotype , collected with holotype (PBI_OON 00005439), deposit- ed in WAM (T90/976). Paratypes : 1 male , 2 females from same location ( 3 June 1988 , A.N. Andersen ) (PBI_OON00005441) deposited in WAM (T90/966–968) . ETYMOLOGY: The specific name is a patronym in memory of Albert (Bert) R. Main, collector of the holotype , in recognition to his enormous contributions to ecology and taxonomy. DIAGNOSIS: Males of C. bertmaini resemble those of C. digweedi , with the sternal concavity occupying about half the sternal length (fig. 12) and the epigastric scutum strongly protruding. Males of C. bertmaini can be easily separated, however, by their pear-shaped cymbium-bulb complex, and the thin, medially bent embolus with small club-shaped basal process (figs. 90– 92). Females can be distinguished from all other Cavisternum species by their narrow copulatory duct, ending level with the tracheal groove (figs. 93, 94). MALE: Total length 1.09. Carapace 0.52 long, 0.41 wide; abdomen 0.57 long, 0.35 wide. Carapace, sternum, mouthparts, and abdominal scutae pale orange, legs yellow. Sternum as long as wide, concavity small in posterior median part of sternum, with drop-shaped field of clavate setae covering about M of sternum width and K of sternum length (fig. 12). Cheliceral fangs elongated, tips bent posteromedially forming V shape, tip widened distally (fig. 12). Abdomen ovoid, epigastric scutum strongly protruding. Cymbium-bulb complex pear shaped bearing a long, medially bent embolus with a small club-shaped basal process (figs. 90–92). FEMALE: Total length 1.20. Carapace 0.50 long, 0.39 wide; abdomen 0.70 long, 0.31 wide. Coloration as in male. Epigastric area with dark, circular copulatory opening and narrow copulatory duct, ending at level of tracheal groove (figs. 93, 94). DISTRIBUTION: This species is found at Cape Bougainville in the Kimberley region of Western Australia (map 1). Cavisternum bertmaini was listed as Oonopidae sp. 02 by Main (1991) .