Elasmopus longipropodus Senna & Souza-Filho, 2011

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

Elasmopus longipropodus Senna & Souza-Filho, 2011

Figs 7 , 27G

Elasmopus rapax (non Elasmopus rapax Costa, 1851): Soares et al. 1987/89: 244, pl. 3, figs 1-12; Wakabara et al. 1991: 73.

Elasmopus aff. rapax : Souza-Filho and Senna 2009: 67.

Elasmopus longipropodus Senna & Souza-Filho, 2011: 59-66, figs 1-6.

Material examined.

Panama • 2.5-7 mm • 3 ♂, 3 ♀; Bocas del Toro, Swan Cay ; 9.453333°N, 82.298333°W; depth 2-3 m, among algae; 4 Aug 2005; S. DeGrave leg.; GCRL 6634 • 2 ♂, 5 ♀, 2 juvenile; Bocas del Toro, Hospital Point; 9.3336°N, 82.218883°W; depth 15 m, among coral rubble; 6 Aug 2005; S. DeGrave leg.; GCRL 6635 • 2 ♂, 7 ♀, 2 juvenile; Bocas del Toro , Isla Solarte channel; 9.294574°N, 82.173114°W; depth 2 m, among Halimeda , 8 Aug 2021; K.N. White leg.; USNM 1703504 • 1 ♀, 3 ♂; Bocas del Toro , San Cristobal; 9.2625°N, 82.235°W; depth 15 m, among coral rubble, 10 Aug 2021; K.N. White leg.; USNM 1703505 • 1 ♂, 2 ♀, 1 juvenile; Bocas del Toro, Crawl Cay; 9.2376°N, 82.1438°W; depth 1.5-3 m, among Halimeda , 11 Aug 2021; K.N. White leg.; USNM1703506 • 1 ♂, 2 ♀; Bocas del Toro, Hospital Point; 9.331967°N, 82.214817°W; depth 1-3 m, among Halimeda , 22 Jun 2023; K.N. White leg.; USNM1703507 • 4 ♂, 1 ♀; Bocas del Toro , Swan Cay; 9.4536°N, 82.300033°W; depth 1-4 m, among red algae, 24 Jun 2023; K.N. White leg.; USNM 1703508 • 1 ♂, 1 juvenile, Bocas del Toro , Crawl Cay; 9.245967°N, 82.136867°W; depth 1-4 m, among green algae; 25 June 2023; K.N. White leg.; USNM 1703509 • 2 ♂; Bocas del Toro , Crawl Cay; 9.24756°N, 82.12901°W; depth 5-8 m, among coral rubble, 26 Jun 2023; K.N. White leg.; USNM 1703510 • 1 ♂, 8 ♀, 1 juvenile; Bocas del Toro , Hospital Point; 9.333383°N, 82.218467°W; depth 11 m, among coral rubble, 26 Jun 2023; K.N. White leg.; USNM 1703511 .

Diagnosis.

Gnathopod 1 propodus subovate, palm oblique. Gnathopod 2 propodus elongate, male palm shorter than posterior margin with two large, rounded processes and one large subacute process at palmar angle. Pereopod 7 basis posterior margin with long setae, articles 4 and 5 of male unexpanded. Epimeron 3 posterior margin serrate. Uropod 3 rami subequal or slightly unequal in length. Telson inner lobes longer than outer lobes, apically rounded.

Distribution.

Brazil: from Rio Grande do Norte State to Rio de Janeiro State (Senna and Souza-Filho, 2011); Panama: Bocas del Toro (present study).

Ecology and remarks.

These amphipods are associated with algae, sponges, and coral rubble at depths of 1.5-15 m. Panamanian specimens agree closely with the description provided by Senna and Souza-Filho (2011) and can be readily distinguished from other species by the shape of the gnathopod 2 propodus.

Figures

Figure 7. Elasmopus longipropodus, female, 2.5 mm, epimeron 3, pereopod 5, gnathopod 1 lateral; male, 4.5 mm, telson, gnathopod 2 lateral, uropod 3. Scale bars: 0.5 mm.

Figure 27. Photographs of live specimens A Dulzura schoenerae B Ceraocus sheardi C Ceradocus shoemakeri D Elasmopus balkomanus E Elasmopus elieri (ethanol preserved specimen) F Elasmopus levis G Elasmopus longipropodus. Scale bars: 1.0 mm.