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 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 , 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. 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) .