Cavisternum ledereri, 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 : 29-30

Cavisternum ledereri , new species

Figures 19 , 131–135 , map 4

TYPES: AUSTRALIA: Queensland: Male holotype from Thatch Creek (NQ 32), 19 ° 06 9 S, 145 ° 18 9 E (26 July–1 Dec. 1992; R. Raven, P. Lawless, E. Lawless, M. Shaw) (PBI_OON 00020010), deposited in QM ( S25275 ). Female allotype collected with holotype (PBI_OON 00023346), deposited in QM ( S83815 ) .

ETYMOLOGY: The specific name is a patronym in honor of Zachary Lederer, a supporter of spider taxonomy.

DIAGNOSIS: Males of C. ledereri resemble those of C. foxae as both have the sternal concavity occupying the whole sternal length (fig. 19) and the epigastric scutum is not protruding. However, males of C. ledereri can be easily separated from all other species by their pear-shaped cymbium-bulb complex with a bifurcate embolus (fig. 133). Females can be easily distinguished from all other Cavisternum species by their dark, broadly oval epigastric area with inverted V-shaped copulatory opening situated between groove and epigastric fold, and with the copulatory duct short, broadly oval and narrowed toward the epigastric fold (figs. 134, 135).

MALE: Total length 1.11. Carapace 0.51 long, 0.40 wide; abdomen 0.60 long, 0.30 wide. Carapace, sternum, mouthparts, and abdominal scutae pale orange, legs yellow. Sternum longer than wide, concavity, along the whole length of the sternum, U-shaped field of clavate setae covering about L of sternum width (fig. 19). Cheliceral fangs extremely long, crossed, tips bent medially and distally widened. Abdomen cylindrical, epigastric scutum not protruding. Cymbium-bulb complex pear shaped with bifurcate embolus (figs. 131–133).

FEMALE: Total length 1.17. Carapace 0.50 long, 0.38 wide; abdomen 0.67 long, 0.30 wide. Coloration as in male. Epigastric area a broadly oval region with inverted V-shaped copulatory opening, situated between groove and epigastric fold, copulatory duct short, broadly oval, narrowed toward epigastric fold (figs. 134, 135).

OTHER MATERIAL EXAMINED: AUSTRALIA: Queensland: Thatch Creek (NQ 32), 19 ° 06 9 S ,

145 ° 18 9 E (26 July–1 Dec. 1992, R. Raven, P. Lawless, E. Lawless, M. Shaw), 2 ³ (PBI_OON 00023345) (QM S83814 ) ; same data except (1 Dec. 1992 – 14 Apr. 1993), 18 ³, 1 ♀ (PBI_OON 00007430) (QM S59573 ) ; same data, 1 ³ (PBI_OON 00020939, QM S52810 ) .

DISTRIBUTION: This species is known only from the type locality in mideastern Queensland (map 4) .

Figures

Figs. 18–25. Cavisternum species, males, sterna and chelicerae, ventral view. 18. C. hughesi (PBI_22901). 19. C. ledereri (PBI_OON 07430). 20. C. maxmoormanni (PBI_OON 06198). 21. C. mayorum (PBI_OON 06167). 22. C. noelashepherdae (PBI_OON 06104). 23. C. rochesterae (PBI_OON 07072). 24. C. toadshow (PBI_OON 06053). 25. C. waldockae (PBI_OON 05444).

Figs. 131–135. Cavisternum ledereri, new species. 131–135. Male palp (PBI_20010). 131. Prolateral view. 132. Retrolateral view. 133. Dorsal view. 134, 135. Female epigyne (PBI_OON 07430). 134. Ventral view. 135. Dorsal view.