Cumopsis, SARS, 1878

Haye, Pilar A., 2007, Systematics of the genera of Bodotriidae (Crustacea: Cumacea), Zoological Journal of the Linnean Society 151 (1), pp. 1-58 : 24-25

CUMOPSIS SARS, 1878

Synonymy: Heterocuma Miers, 1879

Type species: Cumopsis goodsir Van Beneden, 1861

Body: Carapace shorter than abdomen and variable in length with respect to peraeon; abdomen approximately as long as or longer than carapace and peraeon together.

Cephalothorax: From dorsal view the carapace may appear laterally compressed anteriorly. Carapace may have medial and/or dorso-lateral ridges. Pseudorostral lappets may extend beyond frontal lobe and may meet in the midline (or partially meet leaving a suture between them). Antennal notch not distinct, as a depression, subacute or acute incision. Anterolateral corner bluntly rounded or with subacute tooth. Frontal lobe from 1/3 to half of the total carapace length; as wide as long or longer than wide; anteriorly linguiform, somewhat extended or not extended; with ocular pigment and with eye lenses.

Antenna 1 with basal article of the peduncle straight; as long as or shorter than the other two arti- cles together; males may have a group of aesthetascs on distal margin of peduncle. Main flagellum uni- or bi-articulated; with two aesthetascs in distal-most article; may have two or a group of aesthetascs on proximal article. Accessory flagellum uni-articulated; may have a brush of setae. Antenna 2 in males reaching end of pleon.

Maxilliped 3 basis geniculate, arcuate or straight; extended dorso-distally over ischium beyond the articulation of the ischium and merus, slightly expanded laterally or not projected over ischium. Ischium variable in length with respect to merus. Merus without dorsal projection, extended dorso-distally over carpus or slightly expanded laterally. Carpus may be distally widened; equal to or shorter than propodus and dactylus together. Propodus may be oviform and may have a brush of setae.

Peraeon: First peraeonite well exposed, visible only above lateral midline or not visible. Peraeonite 2 may have ventrolateral expansion overriding peraeonite 1 and/or carapace, overriding peraeonite 3 or peraeonite 1 and/or carapace and peraeonite 3. Peraeonite 3 may have ventrolateral expansion extended forward overriding peraeonite 2, backwards overriding peraeonite 4 or forward and backwards overriding peraeonites 2 and 4. Peraeonite 4 may have ventrolateral expansion overriding peraeonite 5 or peraeonites 3 and 5.

Females and males with exopod fully developed on peraeopod 1 and reduced on peraeopods 2 and 3. Peraeopod 1 with basis arcuate or straight; may be slightly projected ventrally; carpus may be oviform; may have a brush (three or more) of long setae on the propodus (setae longer than carpus) or setae in a linear arrangement; carpus variable in length with respect to propodus. Peraeopod 2 without ischium; dactylus longer than propodus. Peraeopod 4 with ischium.

Pleon: Pleonite 5 longer, as long as or shorter than pleonite 6. Pleonite 6 with variable length with respect to width; shorter than peduncle of uropod. Pleonite 6 not extended past the insertion of the uropods or narrow portion of distal end slightly extended past the insertion of the uropods; ending somewhat concave or in a rounded apex. Anal plates may extend posteriorly beyond distal margin of pleonite six.

Uropod endopod bi-articulated; articles approximately same length or proximal article longer than distal one. Uropod exopod with proximal article same length, shorter or longer than distal one. Peduncle of uropods longer, as long as or slightly shorter than rami; rami approximately same length or exopod longer than endopod. Males with five pairs of pleopods. Pleopodal endopod with well developed or reduced process.

Species included:

1. C. africanum ( Zimmer, 1920) (Synonymy: Heterocuma africana Zimmer, 1920 )

– C. africanum africanum ( Zimmer, 1920) (Synonymy: Heterocuma africana Zimmer, 1920 ; H. africanum africanum Day, 1975 ; Bâcescu, 1988)

– C. africana intermedia ( Fage, 1924) (Synonymy: Heterocuma intermedia Fage, 1924 ; H. africana Jones, 1956 ; H. africanum intermedium Day, 1975 ; Bâcescu, 1988)

2. C. andamani ( Kurian, 1954) (Synonymy: Heterocuma andamani Kurian, 1954 )

3. C. armatum ( Kurian, 1954) (Synonymy: Heterocuma armata Kurian, 1954 ; H. armatum Bâcescu, 1988 )

4. C. elongata Jones, 1956

5. C. fagei Bâcescu, 1956

6. C. goodsir ( Van Beneden, 1861)

7. C. jonesi Le Loeuff & Intès, 1972

8. C. longipes ( Dohrn, 1869)

9. C. robusta Day, 1975

10. C. sarsi ( Miers, 1879) (Synonymy: Heterocuma sarsi Miers, 1879 ; Bâcescu, 1988; Heterocuma sarsi granulata Miers, 1879 ; H. granulatum Stebbing, 1913 ; H. sarsi costata Lomakina, 1960 )

11. C. wafri Jones, 1956

12. Cumopsis sp. Toulmond & Truchot, 1964

Distribution: Generally found at shallow waters between 0 and 50 m (up to 100 m) of the East Atlantic and West Pacific Oceans and Mediterranean Sea. Only Cumopsis sarsi from the West Pacific Ocean is found at greater depths (up to 200 m).