Sketinella, Camacho, 2005

Camacho, Ana Isabel, 2005, Disentangling an Asian puzzle: Two new bathynellid (Crustacea, Syncarida, Parabathynellidae) genera from Vietnam, Journal of Natural History 39 (31), pp. 2861-2886 : 2873-2876

Sketinella n. g.

( Figures 8–13 )

Genus diagnosis

Antennule (A.I) ( Figure 9A ) has eight segments, subterminal aesthetascs on the last segment. A.II has six segments. Md has a protuding pars molaris. Proximal endite of the Mx.I has four teeth and distal endite has seven teeth. Th 1–7 with more than two segments (three to five) on exopod; basipods of the thoracopods have only one seta; epipodites absent on Th 1 and 2. Th 8 male large, square; square endopod with two long plumose setae; the large exopod is on the distal face of the basipod, ending in a point with a small lateral tooth or tiny protuberance, curved and overhanging the basipod; distal end of inner lobe exceeding dentate lobe; outer lobe is not fused with basipod; rounded basipod with protuded distal end on the internal lateral edge; dentate lobe rounded and with strong teeth. The first pair of pleopods are a simple seta. Sympod of uropod has three distal spines which are longer than the rest; the endopod of the uropod has two strong distal spines and a kind of ‘‘claw’’ on the distal end; protuded anal operculum.

Type species. Sketinella trontelji n. sp.

Figures

Figure 8. Photograph of Sketinella trontelji n. g. n. sp., male holotype (optical microscope 10×).

Figure 9. Sketinella trontelji n. g. n. sp., male holotype. (A) Antennule (dorsal view); (B) antenna (dorsal view); (C) labrum; (D) mandible; (E) maxillule; (F) maxilla. Scale bar in mm.

Figure 10. Sketinella trontelji n. g. n. sp., male holotype. (A) Thoracopod 1; (B) thoracopod 2; (C) thoracopod 3; (D) thoracopod 8 male (lateral internal view); (E) thoracopod 8 male (latero-caudal view). Scale bars in mm.

Figure 11. Sketinella trontelji n. g. n. sp., male holotype. (A) Thoracopod 4; (B) thoracopod 5. Scale bar in mm.

Figure 12. Sketinella trontelji n. g. n. sp., male holotype. (A) Thoracopod 6; (B) thoracopod 7. Scale bar in mm.

Figure 13. Sketinella trontelji n. g. n. sp., male holotype. (A) First pleopod (latero-ventral view); (B) pleotelson and furca (dorsal view); (C) uropod (latero-external view). Scale bar in mm.