Cavisternum mayorum, 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 : 31-32

Cavisternum mayorum , new species

Figures 21 , 139–143 , map 6

TYPES: AUSTRALIA: Queensland: Male holotype from 4 km NE of Undilla on Gregory Downs –Camooweal Road (NQ 32), 19 ° 36 9 11 0 S, 138 ° 44 9 49 0 E, 255 m (30 June–23 Sep. 2006; R. Raven, B. Baehr, A. Amey) (PBI_OON 00006167), deposited in QM ( S75210 ). Female allotype collected with holotype (PBI_OON 00023347), deposited in QM ( S20634 ) .

ETYMOLOGY: The specific name is a patronym in honor of Caitlyn and Taylah May. Both girls possess a great love of all animals,

most likely inherited from their great-greatgrandfather, Charles Barrett—a naturalist and author during the first half of the 20th century.

DIAGNOSIS: Males of C. mayorum resemble those of C. barthorum in having a long field of clavate setae with the sternal concavity covering about half of the sternum width (fig. 21). Males of C. mayorum can be easily separated by the oval field not reaching the anterior sternal margin, the extremely long and undulate male fangs (fig. 21), the strongly protruding epigastric scutum, and the square cymbium-bulb complex with an extremely long, smoothly inward-bent embolus (figs. 139– 141). Females can be easily distinguished by their long, broad copulatory duct, which reaches beyond the tracheal groove (figs. 142, 143).

MALE: Total length 1.14. Carapace 0.52 long, 0.42 wide; abdomen 0.62 long, 0.37 wide. Carapace, sternum, mouthparts, and abdominal scutae pale orange, legs yellow. Sternum longer than wide, with oval field of clavate setae not reaching anterior margin, covering about L of sternum length and about K of sternum width (fig. 21). Cheliceral fangs extremely long, thin undulate, crossed. Abdomen ovoid, epigastric scutum strongly protruding. Cymbium-bulb complex square with extremely long, smoothly inward-bent embolus (figs. 139–141).

FEMALE: Total length 1.16. Carapace 0.51 long, 0.39 wide; abdomen 0.65 long, 0.25 wide. Coloration as in male. Epigastric area dark, with long, relatively broad copulatory duct reaching beyond tracheal groove (figs. 142, 143).

DISTRIBUTION: This species is known only from the type locality in northwestern Queensland (map 6) .

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. 139–143. Cavisternum mayorum, new species. 139–141. Male palp (PBI_OON 06167). 139. Prolateral view. 140. Retrolateral view. 141. Dorsal view. 142, 143. Female epigyne (PBI_OON 06167). 142. Ventral view. 143. Dorsal view.