Bacescuma, PETRESCU, 1998
publication ID |
https://doi.org/ 10.1111/j.1096-3642.2007.00322.x |
DOI |
https://doi.org/10.5281/zenodo.10544863 |
persistent identifier |
https://treatment.plazi.org/id/95193848-FFD6-FFEE-FED1-F918E06216E6 |
treatment provided by |
Felipe |
scientific name |
Bacescuma |
status |
|
BACESCUMA PETRESCU, 1998 View in CoL
Type species: Bacescuma tanzaniense Petrescu, 1998
Body: Carapace shorter than abdomen and longer than peraeon; abdomen approximately as long as carapace and peraeon together.
Cephalothorax: From dorsal view the carapace appears laterally compressed anteriorly. Carapace with mid-dorsal ridge and lateral ridges. Pseudorostral lappets extend beyond frontal lobe and extend towards midline but do not meet (or partially meet leaving a suture between them). Antennal notch as a depression or as a subacute incision. Anterolateral corner bluntly rounded. Frontal lobe 1/4 of carapace length; as wide as long; anteriorly linguiform; with ocular pigment and eye lenses.
Antenna 1 with basal article of the peduncle arcuate; as long as the other two articles together. Main flagellum bi-articulated; with two aesthetascs in distal-most article. Accessory flagellum uni-articulated. Antenna 2 in males reaching almost the end of pleon. Antenna 2 in females with two articles.
Maxilliped 3 basis arcuate; extended dorsodistally over ischium beyond the articulation of the ischium and merus. Ischium as long as merus. Carpus distally widened; equal to or shorter than propodus and dactylus together. Propodus proximally widened.
Peraeon: First peraeonite visible only in males. Peraeonite 2 proportional to or wider than other peraeonites; with ventrolateral expansion not overriding other somites.
Peraeopod 1 with basis arcuate; may have inner apical angle extended to form a convex process. Carpus longer than propodus. Peraeopod 2 with ischium; dactylus longer than propodus. Peraeopod 4 with ischium.
Pleon: Pleonite 6 longer than 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. Anal plates extend posteriorly beyond distal margin of pleonite six.
Uropod endopod uni-articulated. Uropod exopod with proximal article shorter than distal one. Peduncle of uropods longer than rami; rami approximately same length. Males with five pairs of pleopods.
Species included:
1. B. tanzaniense Petrescu, 1998
Distribution: Coast of Tanzania in the West Indian Ocean, at 0 m in a shallow reef flat with fine sand and mud.
Notes: Modifications of maxillipeds 1 and 2 with numerous setae and the lack of lacinia mobillis and pars incisiva on the mandible may be related to feeding on small-sized particles ( Petrescu, 1998).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.