Hornellia tequestae Thomas & J.L. Barnard, 1986

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

Hornellia tequestae Thomas & J.L. Barnard, 1986

Figs 20 , 29F

Hornellia (Metaceradocus) tequestae Thomas & J.L. Barnard, 1986a: 478-483, figs 1-3; LeCroy 2007: 591.

Material examined.

Panama • 2-3 mm 1 ♂; Bocas del Toro, Crawl Cay ; 9.237675°N, 82.143833°W; depth 2-3 m, among Halimeda ; 11 Aug 2021; K.N. White leg.; USNM 1703542 • 1 ♂, 2 ♀, Bocas del Toro, Hospital Point; 9.331967°N, 82.214817°W; depth 1-3 m, coral rubble; 22 June 2023; K.N. White leg.; USNM 1703543 • 2 ♂, 2 ♀; Bocas del Toro, Crawl Cay; 9.245967°N, 82.136867°W; depth 1-4 m, coral rubble; 25 June 2023; K.N. White leg.; USNM 1703544 • 2 ♂, 4 ♀; Bocas del Toro, Crawl Cay; 9.250217°N, 82.131767°W; depth 5-13 m, coral rubble; 29 June 2023; K.N. White leg.; USNM 1703545 .

Diagnosis.

Antenna 1 accessory flagellum 4-articulate. Gnathopod 1 carpus posterior margin densely setose. Gnathopod 2 not sexually dimorphic, propodus elongate, palm oblique, smooth. Pereopods 5-7 bases posterior margins strongly serrate; pereopod 7 basis without posterodistal lobe. Epimera 1-3 posterior margins smooth, each with well-developed posteroventral tooth. Telson 1.4 × longer than broad, nearly cleft to base, lobes apically acute with two setae.

Distribution.

U.S.A.: Southeastern Gulf of Mexico ( LeCroy 2007), Florida Keys ( Thomas and Barnard 1986a); Panama: Bocas del Toro (present study).

Ecology and remarks.

These amphipods are associated with algae and coral rubble at depths of 0-45 m. Panamanian specimens closely resemble previously described specimens and are readily identified by the distinctly serrate posterodorsal margins of the pleosome and urosome, large posteroventral tooth on each epimeron, and the shape of the telson.

Figures

Figure 20. Hornellia tequestae, male, 1.8 mm, epimeron and urosome; female, 2.2 mm, telson, gnathopods 1 and 2 medial. 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.