Length: 4.5-7mm. Body smooth except for 2 small humps dorsal to insertion of gnathopods 2. Antenna 1 longer than length of body; antenna 2 shorter than antenna 1 peduncle. Gnathopod 1 propodus triangular with single grasping spine, grasping margins of dactylus and propodus serrate. Gnathopod 2 propodus with proximal grasping spine, median tooth, separated from distal triangular projection by a groove, palm setose. Gills elliptical. Pereopods 3 + 4 one-segmented, with apical setae.
Puerto Rico; Virgin Islands; Cuba
In honor of P. Wagenaar Hummelinck of the Zoologisch Laboratorium in the Netherlands.
Caprellid, “Ghost” or “Skeleton” shrimps, so called for their skeletal appearance. Amphipod crustaceans, easily distinguished by the elongate stick-like body form and reduction of the abdominal appendages. Head is generally fused with pereonite 1. Pereopods on first 2 segments (pereonites) are most flexible and called gnathopods; gnathopods 2 being the largest, used in defense, feeding and substrate attachment. In many species pereopods 3 and 4 may also be reduced or absent. Gills on pereonites 3 + 4, rarely on pereonite 2. Pereopods 5 - 7 much smaller than 1 + 2, used for clinging to the substratum. In females, brood plates (öostegites) develop on pereonites 3 + 4. Much remains to be learnt about their biology, ecology and in many cases changing distributions.
4-5m. Found on Thallasia
