End of pleon produced into similar uniramous
Sex was determined by the presence of biramous pleopods in females and uniramous
pleopods in males (Morgan 1980).
15d); (1) uniramous
(Maury & Roig-Alsina 1985:figs.
First pleopods uniramous
, barely reaching caudal margin of annulus when abdomen flexed.
03 mm) bell-shaped with broadly rounded anterior margin between prominent lateral lobes, lamelliform sensilla with sub-marginal origin; labrum extending from anterior frontoclypeal margin into cibarium, rectangular posteriorly; ocelli arranged in a circle, ocularia bordered with hair-like sensilla, temporal spine series extending from near origin of cervical region anteroventrally on a line running below ocularia; antenna uniramous
, length x = 0.
On the other hand, sicyoniids possess morphologic characters that otherwise are unique to Penaeoidea: a single pleurobranchia on the fifth pereiopod, uniramous
third to fifth pleopods, lack of exopods in all pereiopods, closed petasma with distal, sclerotized projections, without true spermatopores, and thelycum with lanceolate median plate.
In addition to size (preserved length [congruent] 14 mm, excluding urogomphi), larvae may be identified to genus by the following combination of characters : frontoclypeus broadly rounded; terminal segments of antennae uniramous
(simple) and less than two-thirds as long as the third; and spiracles of abdominal segment 6 well removed from lateral margins.
Sex was determined by the presence of biramous pleopods for females and uniramous
pleopopds for males (Morgan 1980).