Dulichiella anisochir ( Kroyer , 1845)

White, Kristine N. & Sir, Sally J., 2024, Caribbean Amphipoda (Crustacea) of Panama. Part II: parvorder Hadziidira, ZooKeys 1195, pp. 249-296 : 249

Dulichiella anisochir ( Kroyer, 1845)

Figs 17 , 29C

Melita anisochir Melita anisochir Krøyer, 1845: 317, pl. II, fig. 1a-p; Dana 1852: 968, pl. 66, fig. 8a-d.

Dulichiella anisochir : Lowry and Springthorpe 2007: 10-12, figs 3-6.

Material examined.

Panama • 4-6 mm • 4 ♂, 2 ♀, 4.0 mm; Bocas del Toro, Crawl Cay ; 9.2475°N, 82.1290°W; depth 5 m, among coral rubble; 12 Aug 2021; K.N. White leg.; USNM 1703532 .

Diagnosis.

Gnathopod 1 coxa anteroventral corner produced, rounded, anterior margin concave. Gnathopod 2 propodus distolateral crown with three rounded spines; dactylus apically blunt, overlapping corner of propodus. Pereopods 6 and 7 carpus and propodus without bunches of long slender setae. Epimeron 1 posteroventral corner acute; epimeron 3 posterodistal margin serrate.

Distribution.

Brazil: Rio de Janeiro to Lagoa dos Patos ( Krøyer 1845; Lowry and Springthorpe 2007); Panama: Bocas del Toro (present study).

Ecology and remarks.

These amphipods are associated with soft bottoms and coral rubble at depths of 0-30 m. Panamanian specimens closely resemble previously described specimens, with the exception of a less serrate distal margin on epimeron 3. This difference can most likely be attributed to the size difference of our specimens (4.4 mm) and the lectotype (10.7 mm) described by Lowry and Springthorpe (2007).

Figures

Figure 17. Dulichiella anisochir, male, 4.4 mm, head, coxa 1, gnathopod 2 lateral, epimeron and urosome, pereopods 6 and 7, dactylus enlarged. Scale bars: 0.5 mm.

Figure 29. Photographs of live specimens unless noted A Quadrimaera sarae B Quadrimaera yemanjae C Dulichiella anisochir (ethanol preserved specimen) D Dulichiella lecroyae E Melita planaterga F Hornellia tequestae. Scale bars: 1.0 mm.