Leptopagurus, Lemaitre & Felder & Poupin, 2017

Lemaitre, Rafael, Felder, Darryl L. & Poupin, Joseph, 2017, Discovery of a new micro-pagurid fauna (Crustacea: Decapoda: Paguridae) in the Lesser Antilles, Caribbean Sea, Zoosystema 39 (2), pp. 151-195 : 154

Genus Leptopagurus n. gen.

TYPE SPECIES. — Leptopagurus rhabdotus n. gen., n. sp., by present designation. Gender: masculine.

ETYMOLOGY. — The generic name is derived from the genus name Pagurus , combined with the Greek prefix leptos, which denotes something thin, small, in reference to the thin or elongated shape of the chelipeds and small size of specimens in the single species of this new genus.

DIAGNOSIS. — Eleven pairs of biserial phyllobranch gills, no pleurobranchs on somites X, XI (above pereopods 2 and 3). Rostrum triangular. Second maxilliped with stout propodus-dactyl (propodus height larger than length); third maxilliped ischium with accessory tooth. Chelipeds slender, subequal in length. Sternite of somite XI (thoracomere 6, pereopod 3) with subsemicircular anterior lobe. Pereopod 4 with single row of scales on propodal rasp, dactyl lacking preungual process. Pereopod 5 semi-chelate. Male with coxae of pereopods 5 symmetrical, with paired, subequal, stout, membranous sexual tubes; with unpaired, left pleopods 3-5. Female unknown. Telson nearly symmetrical, with distinct lateral indentations; terminal margins of posterior lobes weakly oblique, armed with spines.

DISTRIBUTION. — Known only from the type species collected in Curaçao, Caribbean Sea. Depth: 224 m.

REMARKS

This genus differs from other pagurid genera in a number of characters, most visibly the presence of paired male sexual tubes; the stout propodus-dactyl of the second maxillipeds; and the slender, subequal chelipeds, with clusters of elongate, capsulate setae on the ventral faces of meri.