Cavisternum foxae, 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 : 25-26

Cavisternum foxae , new species

Figures 15 , 115–119 , map 4

TYPES: AUSTRALIA: Queensland: Male holotype from Bang Bang Jump-up , Acacia forest, 18 ° 31 9 31 0 S, 140 ° 39 9 38 0 E, 57 m, (10 July–23 Sep. 2006, R. Raven, B. Baehr, A. Amey) (PBI_OON 00006069), deposited in QM ( S75121 ). Female allotype collected with holotype (PBI_OON 00023350), deposited in QM ( S83813 ) .

ETYMOLOGY: This specific name is a patronym in honor of Lily Harriet Fox, a supporter of spider taxonomy.

121. Retrolateral view. 122. Dorsal view.

DIAGNOSIS: Males of C. foxae resemble those of C. toadshow , with the sternal concavity occupying the whole sternal length and half of the sternal width, and the epigastric scutum not protruding. However, males of C. foxae can be easily separated by the rectangular anterior margin of the patch of clavate setae, which reaches the anterior margin of the sternum, but with a bare median band (fig. 15), and by their ovoid cymbium-bulb complex with a broadly based and corkscrewshaped embolus (figs. 115–117). Females can be easily distinguished from all other Cavisternum species by the long, narrow copulatory duct reaching beyond the tracheal groove (figs. 118, 119).

MALE: Total length 1.11. Carapace 0.49 long, 0.39 wide; abdomen 0.62 long, 0.30 wide. Carapace, sternum, mouthparts, and abdominal scutae pale orange, legs yellow. Sternum longer than wide, with long field of clavate setae, covering about half of sternum width; anterior margin rectangular, posteriorly oval shaped, median band bare (fig. 15). Cheliceral fangs elongated, tips not widened distally. Abdomen cylindrical, epigastric scutum not protruding. Cymbium-bulb complex broadly ovoid with a thin, medially bent embolus incised at base (figs. 115–117).

FEMALE: Total length 1.14. Carapace 0.48 long, 0.36 wide; abdomen 0.66 long, 0.22 wide. Coloration as in male. Epigastric area (figs. 118, 119) with long narrow copulatory duct reaching beyond tracheal groove.

OTHER MATERIAL EXAMINED: AUSTRALIA: Queensland: Bang Bang Jump-up , Acacia forest, 18 ° 31 9 31 0 S, 140 ° 39 9 38 0 E, 57m, 10 July–23 Sep. 2006, R. Raven, B. Baehr, A. Amey, 12 ³ (PBI_OON 00023349, QM S86479 ) ; Bang Bang Jump-up , rocky hillside, 18 ° 31 9 25 0 S, 140 ° 39 9 48 0 E, 38 m, 10 July–23 Sep. 2006, R. Raven, B. Baehr, A. Amey, 1 ³ (PBI_OON 00006149, QM S75221) ; same data, 1 ³ (PBI_OON 00020606, QM S77174) ; Warren Vale Station, Poverty Knob , 18 ° 27 9 10 0 S, 140 ° 40 9 16 0 E, 43 m, 3 July–24 Sep. 2006, R. Raven, B. Baehr, A. Amey, 2 ³ (PBI_OON 00006238, QM S75306 ) ; same data (PBI_OON 00006089, QM S75124 ) .

DISTRIBUTION: This species is found in northwestern Queensland (map 4).

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. 115–119. Cavisternum foxae, new species (PBI_OON 06069). 115–117. Male palp (PBI_OON 06069). 115. Prolateral view. 116. Retrolateral view. 117. Dorsal view. 118, 119. Female epigyne (PBI_23350). 118. Ventral view. 119. Dorsal view.