Orchomenella thomasi Lowry & Stoddart, 1997

White, Kristine N., 2024, Caribbean Amphipoda (Crustacea) of Panama. Part III: parvorder Lysianassidira, ZooKeys 1216, pp. 149-171 : 149-171

Orchomenella thomasi Lowry & Stoddart, 1997

Figs 9 , 11 D

Orchomenella thomasi Lowry & Stoddart, 1997: 109–113, figs 52–53; LeCroy 2007: 586, fig. 502.

Material examined.

Panama • 1.5 mm • 1 ♀; Bocas del Toro, Cayo Zapatilla 1; 9.2700°N, 82.0587°W; depth 10–11 m, among coral rubble; 28 June 2023; K. N. White leg.; USNM 1739787 .

Diagnosis.

Head ocular lobe subtriangular. Gnathopod 1 carpus shorter than propodus. Epimeron 3 posteroventral corner acute. Urosomite 1 with dorsodistally acute carina. Uropod 3 inner ramus bare; outer ramus 2 - articulate.

Distribution.

USA: from Sanibel Island, Florida to Louisiana ( Lowry and Stoddart 1997; LeCroy 2007); Panama: Bocas del Toro (present study).

Ecology and remarks.

These amphipods are associated with sand and coral rubble at depths of 10– 73 m. Panamanian specimens closely resemble previously described specimens. Panamanian specimens are white in color when alive.

Figures

Figure 9. Orchomenella thomasi, female, 1.5 mm, head, epimeron 3 and urosome, gnathopod 1 lateral. Scale bars: 0.5 mm.

Figure 11. Photographs of live specimens unless noted A Shoemakerella cubensis (ethanol preserved specimen) B Shoemakerella lowryi C Lepidepecreum magdalenensis (ethanol preserved specimen) D Orchomenella thomasi (ethanol preserved specimen). Scale bars: 1.0 mm.