Mysidium (Orientomysidium), Wittmann & Wirtz, 2019

Orientomysidium Wittmann subgen. nov.

urn:lsid:zoobank.org:act:E269F7A6-0187-4AD0-9D64-24C700D5126D

Type species

Diamysis columbiae Zimmer, 1915 , by present designation. This taxon acknowledged in revised combination as Mysidium (Orientomysidium) columbiae (Zimmer 1915) .

Etymology

Noun in nominative singular with neutral ending, formed by amalgamation of the Latin adjective ‘ orientale ’ with the generic name Mysidium , referring to the occurrence on the east coast of America.

Diagnosis

Subdivision of the genus Mysidium Dana, 1852 , characterized by three-segmented carpopropodus of third thoracic endopod; merus of this endopod with serrated setae. Third male pleopod with strong endite at about 50–60% distance from basis of medial margin. Sympod of fourth male pleopod with series of setae on rostral face. Its exopod three-segmented; proximal segment without seta; the two distal segments each with one unbranched modified seta. Telson with terminal cleft.

Distribution

Littoral and sublittoral waters at Atlantic coasts of tropical America (24° N to 8° S), including Gulf of Mexico and Caribbean.