Table 3 Discriminating morphological characters of naupliar instars of Sacculina carcini Thompson, 1836
Shape | Fronto-lateral horns | Antennule | Telson and furca | |
|---|---|---|---|---|
N1 | Ovoid | Oriented backward, with an anterior terminal spine, without terminal fringe | S1 conspicuous | Triangular and short rami |
N2 | Elongated | Opened laterally. Two terminal spines. Fringe of joined setae | S1 conspicuous | Elongated, thick and close rami |
First third without setule | ||||
Two distal third with numerous setules | ||||
N3 | Elongated | Opened laterally. Two terminal spines and fringe of setae individualized | S1 inconspicuous | Slender and diverged rami |
Two distal third with spaced setules | ||||
N4 | Elongated | Opened laterally. Two terminal spines and fringe of setae individualized | S1 absent | One tubercle with setules between rami, in ventral view |
N5 | Elongated | Opened laterally. Two terminal spines and fringe of setae individualized | S1 absent, S5 inconspicuous | One large tubercle with setules between rami |
Two symmetrical and lateral notches with spine |