Leander tenuicornis (Say, 1818)

Palaemon tenuicornis — Rathbun 1920: 7 (Curaçao); Schmitt 1924: 72 (Curaçao).

Leander tenuicornis — Holthuis 1952: 155 (Curaçao); Poupin 2018: 107 (Sint Maarten).

Material examined. Curacao: RMNH. CRUS.D.2270: 1 non-ovigerous female pocl. 3.4 mm; 28.ix.1905, collected by J. Boeke. RMNH. CRUS.D.12929: 1 male pocl. 2.4 mm; Santa Cruzbaai, 13.xii.1956, collected by L.B. Holthuis (fcn. 1021). RMNH. CRUS.D.2262: 1 ovugerous female, pocl. 6.0 mm; 26.v.1905, collected by Prof. Boeke. RMNH. CRUS.D.28532: 2 males, pocl. 4.3 mm; 1 non-ovigerous female, pocl. 5.6 mm; Piscaderabaai, 14.ii.1957, 0–1 m, seagrass, Rhizophora sp., at night collected by L.B. Holthuis (fcn. 1104). RMNH. CRUS.D.28533: 1 non-ovigerous female, pocl. 2.2 mm; Piscaderabaai, 14.xii.1963, sand, Rhizophora sp., garbage and Halimeda sp. collected by P. Wagenaar Hummelinck (fcn. 1460A). RMNH. CRUS.D.28534: 2 non-ovigerous females, pocl. 4.5, 5.0 mm; 4 males, pocl. 3.7, 3.8, 4.0, 4.3 mm; Piscaderabaai, 12.xi.1956, depth 0–1 m, collected by L.B. Holthuis (fcn. 1002). ZMA. CRUS.D.240305: 1 male, pocl. 5.0 mm; Spaansche water, 25.v.1930, collected by Holthuis. Sint Maarten: RMNH. CRUS.D.37605: 1 non-ovigerous female, pocl. 3.1 mm; Oysterpond, 13/ 27.xii.1987, depth 1 m, collection P.A. v.d. Heuvel.

Ecology. Associated with algae and sea grass beds (De Grave & Anker 2017). Also associated with pelagic Sargassum sp. (Bennice & Brooks 2016).

Distribution. Pantropical in tropical and subtropical shallow water habitats. Recorded in depths between 1 and 71 m (Poupin 2018). Previous records from Curacao by Rathbun (1920 as Palaemon tenuicornis), Schmitt (1924, as Palaemon tenuicornis), and Holthuis (1952).