Mysidetes Holt & Tattersall, 1906

Wittmann, Karl J. & Chevaldonne, Pierre, 2021, First report of the order Mysida (Crustacea) in Antarctic marine ice caves, with description of a new species of Pseudomma and investigations on the taxonomy, morphology and life habits of Mysidetes species, ZooKeys 1079, pp. 145-227 : 145

Genus Mysidetes Holt & Tattersall, 1906

Mysidetes Holt & Tattersall, 1906a: 39-40 (new genus, diagnosis); Holt and Tattersall 1906b: 10 (preliminary diagnosis); Hansen 1910: 9 (taxonomy, assigned to Leptomysini ); Zimmer 1914: 401-402 (taxonomy); Tattersall and Tattersall 1951: 305 (diagnosis); Bowman and Orsi 1992: 738-739 (transfer to Heteromysini ); Wittmann et al. 2014: 341 (type genus of Mysidetini ); Mees and Meland 2021: AphiaID 119884 (taxon accepted).

Metamysidella Illig, 1906: 210-211, fig. 17 (junior synonym); Mees and Meland 2021: AphiaID 226152 (not accepted).

Diagnosis.

Mysidetini with eyes well developed; cornea large, globular, with functional ommatidia; eyestalks well developed. Antennula usually without modified setae (exception: females of M. illigi Zimmer, 1914, as described below). Appendix masculina well-developed, setose. Antennal scale setose all around, no spines and no teeth. Mouthparts normal, maxilla without spines. Male thoracic endopod 2 without notches on outer margin. Thoracic endopods 3-8 normal, slender, not prehensile; with multi-segmented carpopropodus; small dactylus with weak claw. Penes long, slender, stiff, and not erectile. Pleopods non-dimorphic, reduced to bifid setose plates, no modified setae and no spines. Endopod of uropods usually with row of spines on inner margin (exception: M. hanseni Zimmer, 1914, as described below). Telson with apical cleft; cleft lined with laminae. Lateral margins of telson at least distally with spines.

Species inventory.

Type species is Mysideis Farrani Holt & Tattersall, 1905, current name Mysidetes farrani (Holt & Tattersall, 1905). Total of 17 species including the here re-installed M. illigi Zimmer, 1914, are acknowledged as in the following key: