pleonal

pleonal

(ˈpliːənəl)
adj
(Zoology) zoology relating to the abdomen of a crustacean
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References in periodicals archive ?
Briefly, for juvenile/preadult females (uncompleted pubertal molt), the shape of the pleonal flap was triangular, whereas the shape of pleonal flap for adult females (completed pubertal molt) was oval.
The fifth pleonal segment is particularly elongated and bears a telson with uropods.
Disparity in thoracic and pleonal appendage growth and differentiation is considerable in the Caridea, and it appears to be driven, at least partially, by habitat (marine vs.
Specimens were sexed by the number of pleopods, i.e., four unpaired pleonal appendages for female and three pleopods on the left side for males, as well as by the gonopore position, on the fifth and third pair of pereopods for females and males, respectively (Tudge et al., 2012).
There are 5 ovarian stages during the ovarian development cycle: stage I, before puberty molting and with a triangular pleonal flap, with the ovary mainly include oogonium; stage II, the ovary is milky white and comprised mainly of previtellogenic oocytes and endogenous vitellogenic oocytes; stage III, the ovary is light yellow or tan and comprised primarily of exogenous vitellogenic oocytes and endogenous vitellogenic oocytes; stage IV, the ovary is deep purple and comprised mainly of nearly mature oocytes and exogenous vitellogenic oocytes; and stage V: the ovary is chocolate brown and comprised mainly of mature oocytes.
Third pleonal pleuron unarmed marginally, posterolateral angle subrectangular; fourth and fifth pleura (Figs.
Third pleonal pleuron unarmed marginally, posterolateral angle rounded; fourth and fifth pleura each with blunt or subacute posteroventral angle, without marginal teeth or denticles.
Presumable synapomorphies among species of Chorocaris and Rimicaris are the following: the tendency of a rostral reduction, nonacuminate antennal tooth of the carapace, nonmarginally dentate posterolateral margin of pleura of fourth and fifth pleonal somites, the presence of a distolateral transverse suture on the antennal scale, and the nonacuminate uropodal protopod.