Leucothoe ubouhu Thomas & Klebba, 2007

Dugger, Abigail R. & White, Kristine N., 2025, Caribbean Amphipoda (Crustacea) of Panama. Part V: parvorder Amphilochidira, ZooKeys 1259, pp. 57-102 : 57-102

Leucothoe ubouhu Thomas & Klebba, 2007

Figs 20, 24E

Leucothoe ubouhu Thomas & Klebba, 2007: 25–30, figs 15–18, 22 A, B; LeCroy 2011: 633, fig. 521; White 2011: 30–31, fig. 8.

Material examined.

Panama • 1–7 mm • 1 juvenile; Bocas del Toro, Sunset Point ; 9.3556°N, 82.2612°W; among Thalassia ; 6 Aug 2005; R. Collin, M. Faust, E. Gaiser, S. LeCroy, S. Richardson, M. Sorensen leg.; GCRL 6694 • 1 ♂; Bocas del Toro, Hospital Point ; 9.3336°N, 82.2188°W; depth 15 m; among coral rubble and Halimeda ; 6 Aug 2005; S. DeGrave, M. Salazar leg.; GCRL 6695 • 11 ♂, 14 ♀, 6 juveniles; Bocas del Toro, Crawl Caye ; 9.2505°N, 82.1316°W; depth 10 m; among coral rubble and red sponges; 7 Aug 2005; S. DeGrave, M. Salazar leg.; GCRL 6696 • 2 ♀; Bocas del Toro, Cayo Solarte ; 9.3336°N, 82.2189°W; depth 2 m; among sand and coral rubble; 7 Aug 2005; R. Collin, M. Faust, E. Gaiser, S. LeCroy, S. Richardson, M. Sorensen leg.; GCRL 6697 • 1 ♂; Bocas del Toro, Weather Instrument Platform ; 9.3333°N, 82.2185°W; depth 1 m; commensal in lavender sponge; 8 Aug 2005; T. A. Haney leg.; GCRL 6698 • 1 ♂; Bocas del Toro, Isla San Cristobal ; depth 0.2 m; among red algae; 9 Aug 2005; T. A. Haney leg.; GCRL 6699 • 1 ♀; Bocas del Toro, Almirante ; 9.2900°N, 82.3429°W; depth 10–11 m; commensal in Pseudoceratina crassa ; 7 Aug 2021; K. N. White leg.; USNM 1762969 • 1 ♂; Bocas del Toro, Crawl Caye ; 9.2378°N, 82.1438°W; depth 1.5–3 m; among coral rubble; 11 Aug 2021; K. N. White leg.; USNM 1762970 • 1 ♂; Bocas del Toro, San Cristobal ; 9.2849°N, 82.2945°W; depth 1–3 m; among sponges; 21 June 2023; K. N. White leg.; USNM 1762971 • 5 ♀; Bocas del Toro, Hospital Point ; 9.3319°N, 82.2148°W; depth 1–3 m; among coral rubble; 22 June 2023; K. N. White leg.; USNM 1762972 • 1 ♂; Bocas del Toro, Crawl Caye ; 9.2459°N, 82.1369°W; depth 1–4 m; in sand; 25 June 2023; K. N. White leg.; USNM 1762973 • 2 juveniles; Bocas del Toro, STRI dock ; 9.3511°N, 82.2570°W; depth 0–1 m; dock scraping; 27 June 2023; K. N. White leg.; USNM 1762971 .

Diagnosis.

Head anterior margin truncate, anterodistal margin with cusp; ventral keel produced, subquadrate. Gnathopod 1 basis anterior margin with several setae, female posterior margin lined with setae; carpus proximal margin dentate; propodus palm dentate, with distal setae; dactylus reaching further than 0.2 × propodus length. Gnathopod 2 basis anterior margin with several short and medium length setae, female posterior margin with few setae; carpus distally truncate, anterior margin dentate; propodus primary mediofacial setal row above midline, slightly displaced, reaching 0.6–0.7 × propodus length, secondary mediofacial setal row with four setae, palm minutely tuberculate, one row of submarginal setae present. Coxa 4 smooth, posterior margin concave. Epimeron 3 posteroventral corner subquadrate.

Distribution.

USA: Florida Keys ( Thomas and Klebba 2007); Belize: Pelican Cays ( Thomas and Klebba 2007); Panama: Bocas del Toro ( White 2011; present study).

Ecology and remarks.

This species occurs as commensal in sponges, and among Halimeda , sand, and coral rubble at depths of 0– 12 m. Panamanian specimens agree closely with the original description with the exception of a more setose posterior margin on gnathopod 1 basis (see White 2011 for other variations not found in these specimens). Living specimens are translucent orange with red eyes.

Figures

Figure 20. Leucothoe ubouhu, female, 3 mm, gnathopod 1 medial, epimeron 3, coxa 4, pereopod 7, head, gnathopod 2 medial. Scale bars: 0.5 mm.

Figure 24. Photographs of living specimens unless noted. A. Leucothoe kensleyi; B. Leucothoe laurensi; C. Leucothoe machidai (ethanol-preserved specimen); D. Leucothoe tunica (ethanol-preserved specimen); E. Leucothoe ubouhu; F. Leucothoe wuriti. Scale bars: 1.0 mm.