Cyllopus lucasii Bate, 1862: 306–307, pl. 50, fig. 2.
Cyllopus antarcticus Spandl, 1927: 175–176, fig. 12a–h.
Type material
Type material of C. lucasii could not be found at the BMNH or MNHN and is considered lost. Fortunately the description and figures of Bate (1862) are sufficient to define this species. The type locality is “the Powel Islands ” (South Orkney Islands).
Type material of synonyms
Type material of C. antarcticus is in the ZMB (20773). These specimens are all clearly conspecific with C. lucasii.
Material examined (> 150 specimens)
Types. Several syntypes of C. antarcticus from a penguin’s stomach (Pigoscelis papua) caught off South America (65º18’S, 80º27’E), Deutschen SüdpolarExpedition, 27th March 1903: in spirit.
Other material examined. South Atlantic (Sth. Georgia /Weddell Sea): 13 lots (BMNH), 1 lot (ZMB), 2 lots (ZMH), several specimens. Antarctic: 1 lot (BMNH), 1 specimen; Prydz Bay: 32 lots (SAMA), numerous specimens.
Diagnosis
Body length up to 26 mm. Antennae 1 with very slender, conical flagellum, without additional terminal articles. Gnathopod 1 weakly chelate, with slightly inflated carpus. Gnathopod 2; carpal process reaching to about limit of propodus. Pereopod 7 with basis narrowed distally, with concave posterior margin. Uropod 1; endopod subequal in length to peduncle, barely reaching limit of U3.
Distribution This is a circumAntarctic species restricted to south of the Antarctic Convergence.