Cavisternum heywoodi, 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 : 27

Cavisternum heywoodi , new species

Figures 17 , 123–127 , map 5

TYPES: AUSTRALIA: Queensland: Male holotype from Mt Molloy , 16 ° 44 9 27 0 S, 145 ° 19 9 19 0 E, riparian woodland, 400 m (Dec. 1992 – Jan. 1993, S. Burnett) (PBI_OON 00007474), deposited in QM (S72984). Female allotype from same location (1 Jan. 1993, S. Burnett) (PBI_OON 00020933), deposited in QM ( S59015 ) .

ETYMOLOGY: The specific name is a patronym in loving memory of Hosea Heywood.

DIAGNOSIS: Males of C. heywoodi resemble those of C. rochesterae with the sternal concavity occupying about K the sternal length and O of the sternal width (fig. 17), and the epigastric scutum slightly protruding. Males of C. heywoodi have smaller eyes, and long and thick fangs, which that cross and reach labium (fig. 17), and a long flattened embolus with a deep basal incision (fig. 124). Females of C. heywoodi differ from other known females by the tripartite copulatory duct (figs. 126, 127).

MALE: Total length 1.17. Carapace 0.54 long, 0.46 wide; abdomen 0.63 long, 0.38 wide. Carapace, sternum, mouthparts, and abdominal scutae orange-brown, legs yellow. Sternum as long as wide, with median concavity occupying about K of sternal length, O of sternal width (fig. 17). Cheliceral paturon with large triangular distal tooth at basis of fang, fang long, tip distally widened, bent posteromedially and crossing other fang. Abdomen ovoid, epigastric scutum slightly protruding. Cymbium-bulb complex square, with a long flattened embolus deeply incised at retrolateral base (figs. 123–125).

FEMALE: Total length 1.21. Carapace 0.52 long, 0.41 wide; abdomen 0.69 long, 0.35 wide. Coloration as in male. Epigastric area with semicircular rim, reaching apodemes laterally, a large U-shaped field consisting of three parts reaching beyond tracheal groove and a narrow copulatory duct (figs. 126, 127).

OTHER MATERIAL EXAMINED: AUSTRALIA: Queensland: Davies Creek National Park , 17 ° 00 9 S, 145 ° 34 9 E, 29 Oct. 1991 – 23 July 1992, R. Raven, P. Lawless, M. Shaw, 2 ³, 1 ♀ (PBI_OON 00006914, QM S22724 ) , 1 ♀ (PBI_OON 00019982, QM S79595 ) ; 23 July– 26 Nov. 1992, R. Raven, P. Lawless, M. Shaw, 2 ³ (PBI_OON 00019949, QM S72979 ) .

DISTRIBUTION: This species is found in northeastern Queensland (map 5).

Figures

Figs. 10–17. Cavisternum species, males, sterna and chelicerae, ventral view. 10. C. bagleyae (PBI_OON 06235). 11. C. barthorum (PBI_OON 06073). 12. C. bertmaini (PBI_OON 05440). 13. C. carae (PBI_OON 05434). 14. C. digweedi (PBI_OON 05438). 15. C. foxae (PBI_OON 06069). 16. C. gatangel (PBI_OON 06070). 17. C. heywoodi (PBI_OON 07474).

Figs. 123–127. Cavisternum heywoodi, new species. 123–125. Male palp (PBI_OON 07474). 123. Prolateral view. 124. Retrolateral view. 125. Dorsal view. 126, 127. Female epigyne (PBI_OON 06914). 126. Ventral view. 127. Dorsal view.