Tethygeneia longleyi (Shoemaker, 1933)

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

Tethygeneia longleyi (Shoemaker, 1933)

Figs 26 , 30F

Pontogeneia longleyi Shoemaker, 1933: 253-254, figs 6, 7.

Tethygeneia longleyi : LeCroy 2007: 513, fig. 452.

Material examined.

Panama • 3-5 mm • 1 ♀; Bocas del Toro, Mangrove Inn; depth 1 m, among Caulerpa ; 3 Aug 2005; M. Faust leg.; GCRL 6654 • 2 ♂, 1 ♀; Bocas del Toro, Drago ; 9.418056°N, 82.3375°W; depth 2-3 m, among coral rubble, 9 Aug 2021; K.N. White leg.; USNM 1703555 • 3 ♂, 7 ♀, 1 juvenile; Bocas del Toro, Drago; 9.413433°N, 82.33335°W; depth 1-3 m; among Halimeda and Dictyota , 23 June 2023; K.N. White leg.; USNM 1703556 • 2 ♂, Bocas del Toro, Swan Cay; 9.4536°N, 82.300033°W; depth 2 m; among red algae, 24 June 2023; K.N. White leg.; USNM 1703557 • 2 ♂, 1 ♀, 3 juvenile; Bocas del Toro, Cayo Zapatilla 2; depth 0 m, buoy scraping; 29 June 2023; L. Hughes leg.; USNM 1703558 .

Diagnosis.

Rostrum wide, curved, distally rounded. Gnathopods 1 and 2 propodus palm each with one to three spines and several setae. Epimeron 3 posterior margin smooth or slightly serrate. Uropod 3 inner ramus subequal in length to outer ramus Telson cleft 3/4 of length, lobes narrowing distally, apically rounded.

Distribution.

U.S.A.: Hutchinson Island to the Dry Tortugas, Florida ( Shoemaker 1933; Camp et al. 1977; LeCroy 2007); Cuba: Archipélago Sabana-Camagüey ( Ortiz and Lalana 1996); Venezuela: Maiguetia and Porlamar ( Ruffo 1950); Brazil: Sao Paulo and Paraná ( Wakabara and Serejo 1998); Panama: Bocas del Toro (present study).

Ecology and remarks.

These amphipods are associated with algae and sand at depths of 0-11 m. Panamanian specimens closely resemble previously described specimens in all aspects, and have the rounded telson apices as described by Shoemaker (1933) rather than the more subtruncate apices described by LeCroy (2007).

Figures

Figure 26. Tethygeneia longleyi, male, 2.1 mm, head, telson, epimeron 3, gnathopods 1 and 2 medial, uropod 3. Scale bars: 0.5 mm.

Figure 30. Photographs of live specimens unless noted A Gibberosus devaneyi B Gibberosus myersi C Resupinus spinicaudatus (ethanol preserved specimen) D Eusiroides yucatanensis E Nasageneia bacescui F Tethygeneia longleyi. Scale bars: 1.0 mm.