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Table 3 Discriminating morphological characters of naupliar instars of Sacculina carcini Thompson, 1836

From: Synchronism of naupliar development of Sacculina carcini Thompson, 1836 (Pancrustacea, Rhizocephala) revealed by precise monitoring

  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
  1. N1–5 naupliar instars 1–5, S1 antennular seta 1, S5 antennular seta 5