Plesiopenaeus Bate, 1881

Tavares, Carolina R. & Serejo, Cristiana S., 2007, Taxonomy of Aristeidae (Dendrobranchiata: Penaeoidea) from the central coast of Brazil, collected by the Revizee program, between 19 º and 22 ºS, Zootaxa 1585, pp. 1-44 : 33

Genus Plesiopenaeus Bate, 1881

Integument glabrous. Rostrum elongate in adult females, short in adult males, bearing 2 basal dorsal teeth, followed by single postrostral tooth. Carapace, orbital, postantennal and hepatic spines absent. Cervical sulcus either almost reaching middorsal line, or only demarked laterally; gastro-orbital, antennal, hepatic and branchiocardiac carinae well marked; postrostral carina reaching at least to midlength of carapace. Eye with cornea slightly flattened; calathus moderately elongate, with strong tubercle at about midlength of mesial margin. Dorsal antennular flagellum flattened for most of its length; ventral antennular flagellum elongate, slender, terete, not modified in adult male. Scaphocerite with lateral marginal ridge ending in short spine at about distal five-sixths length of lamella.

First to fifth pereopods each with rudimentary exopod; first pereopod, or first and second pereopod with distal cuspidate setae. Fourth and fifth pereopods more slender than preceding ones.

Petasma with distal margin of lateral lobule oblique, mesially reaching as far as medium lobe; ventral costa free distally, its rounded or subacute apical part directed laterally. Thelycum open, with shield-like protuberance on sternite XII anteriorly acute; sternite XIII roughly rectangular. First and second abdominal somites dorsally rounded; posterior half of third abdominal somite and fourth to sixth somites dorsally carinate. Telson with four pairs of movable lateral spines in posterior half; apex acute (modified from Pérez Farfante & Kensley, 1997).

Remarks: The position of gills and epipods is the same in the two species of the genus examined herein, so, different from what was observed for Aristeus as discussed earlier.