Chlamydopleon Ortmann, 1893

Wittmann, Karl J., 2009, Revalidation of Chlamydopleon aculeatum Ortmann, 1893, and its consequences for the taxonomy of Gastrosaccinae (Crustacea: Mysida: Mysidae) endemic to coastal waters of America, Zootaxa 2115, pp. 21-33 : 22-23

Genus Chlamydopleon Ortmann, 1893

Chlamydopleon Ortmann, 1893: 25 ; nec Illig, 1906: 209, fig. 16 (= Pseudanchialina Hansen, 1910 ). Gastrosaccus .— Hansen 1910: 55 (partim); Coifmann, 1937: 7 (partim); Tattersall, 1951: 89 (partim). Archaeomysis .— Tattersall, 1932: 303 (partim); 1951: 86 (partim).

Coifmanniella Bǎcescu, 1968 (subgenus): 356 (nomen nudum, partim).

nec Bowmaniella Bǎcescu, 1968 (subgenus): 356 (nomen nudum, = Coifmanniella Heard & Price, 2006, partim). Bowmaniella .— Brattegard, 1970: 9 (partim); Holmquist, 1975: 63.

Bowmaniella Heard & Price, 2006: 6 (new synonymy).

Revised diagnosis. Mysidae Gastrosaccinae with normal eyes. Basal segment of outer antennular flagellum swollen, densely setose. Antennal scale with smooth outer margin ending in a tooth; a small, setose apical segment is separated by a transverse suture. Postero-dorsal margin of carapace with a median and two submedian lobes, these lobes projecting caudally. Labrum with a long, smooth, anteriorly directed, median spiniform projection. Thoracic exopods with multi-segmented flagellum, third to eighth endopods with multisegmented carpopropodus. Marsupium supported by large pleural plates of first pleonite. Pleopods biramous in both sexes; endopods one-segmented in both sexes; exopods one-segmented in females, multi-segmented in males. Third male pleopod with complex exopod; tip of this exopod in the subterminal form with distinct inner stylet on inner branch. Fifth pleonite dorsally with caudally projecting, articulated lobe. Exopod of uropods with spine-like setae on outer margin; endopod with series of mostly medium-sized to large spines along inner margin—no additional set of smaller spines near statocyst. Lateral margins of telson with several spines; distinct apical cleft present, cleft armed with numerous laminae.

Etymology and gender. The generic name is a fusion of the Greek term ‘ chlamýdos ’ (genitive of ‘ chlamýs ’ = garment with collar) with the morphological term ‘pleon’. Ortmann (1893) did not indicate etymological details. He possibly may have interpreted the pleural plates on the first pleonite as collar-like structures that surround and support the posterior portion of the marsupium. Gender is neutral.

Type species. Chlamydopleon aculeatum Ortmann, 1893 , originally designated by monotypy and acknowledged here.

Further species. Gastrosaccus dissimilis Coifmann, 1937 and Bowmaniella (Coifmanniella) banneri Bǎcescu, 1968 are integrated here.

Distribution. Marine and brackish waters along the temperate to tropical Atlantic and Pacific coasts of America.