Mancocuma, ZIMMER, 1943

Haye, Pilar A., 2007, Systematics of the genera of Bodotriidae (Crustacea: Cumacea), Zoological Journal of the Linnean Society 151 (1), pp. 1-58 : 29-30

MANCOCUMA ZIMMER, 1943

Type species: Mancocuma stelliferum Zimmer, 1943

Body: Carapace shorter than abdomen and similar in length or shorter than peraeon; abdomen shorter than carapace and peraeon together.

Cephalothorax: In dorsal view the carapace may be laterally compressed anteriorly. Pseudorostral lappets extend beyond frontal lobe and meet in midline. Antennal notch not distinct or as a depression. Anterolateral corner bluntly rounded. Frontal lobe 1/4 to half the total carapace length; as wide as long or wider than long; anteriorly linguiform or not extended; may have ocular pigment and/or lenses.

Antenna 1 with basal article of the peduncle arcuate or straight; shorter than the other two articles together. Main flagellum bi- or tri-articulated; with second article longer than third; with zero, one or two aesthetascs in distal-most article; may have two aesthetascs on proximal article. Accessory flagellum uniarticulated; may have a brush of setae. Males with antenna 2 reaching only to end of peraeon; anterior margin with pad-like sensory setae; without sensory setae on anterior margin of article four. Antenna 2 in females with three articles.

Maxilliped 3 basis arcuate; extended dorso-distally over ischium beyond the articulation of the ischium and merus or slightly expanded dorso-distally. Ischium shorter than merus. Merus slightly expanded laterally. Carpus oviform and equal to or shorter than propodus and dactylus together. Propodus oviform or distally widened; with a brush of setae.

Peraeon: First peraeonite well exposed or visible only above lateral midline. Peraeonite 2 with ventrolateral expansion overriding peraeonite 1 and/or carapace and peraeonite 3. Peraeonite 3 extended backwards overriding peraeonite 4. Peraeonite 4 with ventrolateral expansion overriding peraeonite 5.

Females and males with fully developed exopods on peraeopods 1–3 and reduced on peraeopod 4. Peraeopod 1, opercular (with basis and carpus expanded, ischium and merus rotated to parallel positions); basis straight, with row of setae; carpus oviform in shape, with row of setae; brush of long setae (three or more) on propodus (setae longer than carpus) or setae in a linear arrangement along propodus; carpus longer than propodus. Peraeopod 2 with or without ischium; dactylus and propodus approximately same length. Peraeopod 3, propodus and dactylus small, not articulated at the distal end of the carpus but at its side wall. Peraeopod 4 with ischium.

Pleon: Pleonite 6 longer than wide or as long as wide; shorter than peduncle of uropod. Whole width of terminal end of pleonite 6 slightly extended between the bases of the uropods; ending in a point or a rounded apex.

Uropod endopod bi-articulated; proximal article longer than distal one. Uropod exopod with proximal article shorter than distal one. Peduncle of uropods slightly longer than rami or approximately as long as rami; rami approximately same length or endopod longer than exopod. Males with two pairs of pleopods. Pleopodal endopod without a process.

Species included:

1. M. alterum Zimmer, 1943

2. M. stelliferum Zimmer, 1943

Distribution: Inhabits brackish waters of the North- Western Atlantic Ocean up to 18 m depth.