Eocuma Marcusen, 1894

Kim, Sung-Hyun, Lee, Chang-Mok & Kim, Young-Hyo, 2020, Eocuma orbiculatum sp. nov. (Crustacea, Cumacea, Bodotriidae) from Korean waters, ZooKeys 910, pp. 79-91 : 79

Genus Eocuma Marcusen, 1894

Type species.

Eocuma hilgendorfi Marcussen, 1894.

Diagnosis.

Carapace may appear laterally compressed anteriorly or posteriorly in dorsal view; may be oviform posteriorly; may have dorsal median carina, dorso-lateral carinae, lateral carinae and/or lateral horns. Antenna 1 with basal article of the peduncle arcuate or straight, as long as or shorter than the other two articles combined. Maxilliped 3 basis geniculate, arcuate or straight, extended dorso-distally over ischium beyond the articulation of the ischium and merus. First pereonite visible only above lateral midline or invisible. Pereonite 2 variable in width with respect to other pereonites; may have ventro-lateral expansion overriding pereonite 3, carapace and pereonite 3 or not overriding other somites. Basis of pereopod 1 distally produced beyond insertion of ischium. Pereopod 2 without ischium; dactylus longer than propodus. Uropod peduncle much shorter than pleotelson or rami. Uropod endopod uniarticulate. Uropod exopod with proximal article shorter than distal one. Males with five pairs of pleopods.

Remarks.

Eocuma was considered similar to Mossambicuma Day, 1978, but could be distinguished by carapace shape and projection on the basis of the pereopod 1. Haye (2007) demonstrated, however, Mossambicuma to be a synonym for Eocuma , since E. muradianae Petrescu, 1998 also lacks the projection on the basis of pereopod 1 and many other species in Eocuma lack lateral horns. Haye (2007) supported these observations by analyzing character evolution of the family Bodotriidae , including the genus Eocuma . Korean species reported as Eocuma , including this new species, have morphological characteristics that correspond to the universal characteristics of Eocuma diagnosed by Haye (2007).

Species composition.

Eocuma aculeatum Day, 1978; E. affine Calman, 1904; E. agrion Zimmer, 1914; E. amakusense Gamô, 1967; E. bacescui Petrescu, 2003; E. cadenati Fage, 1950; E. calmani Fage, 1928; E. carinocurvum Corbera, Tirado & Martin, 2005; E. cochlear Le Loeuff & Intes, 1972; E. dimorphum Fage, 1928; E. dollfusi Calman, 1907; E. elongatum (Day, 1978); E. ferox (Fischer, 1872); E. foveolatum Day, 1978; E. gorgasiae Mühlenhardt-Siegel, 1996; E. hilgendorfi Marcusen, 1894; E. kempi Kurian, 1954; E. lanatum Le Loeuff & Intes, 1972; E. latum Calman, 1907; E. longicorne Calman, 1907; E. muradianae Petrescu, 1998; E. petrescui Patel, Haye & Kornfield, 2003; E. rosae Corbera & Galil, 2007; E. sarsii (Kossmann, 1880); E. spiniferum Gamo, 1976; E. stelliferum Calman, 1907; E. striatum Kurian & Radha Devi, 1983; E. taprobanicum Calman, 1904; E. travancoricum Kurian, 1951; E. victoriae ( Mühlenhardt-Siegel, 2003); and E. winri Day, 1978.