Cardisoma crassum (Hendrickx, 1995)

Vázquez-López, Horacio, Cházaro-Olvera, Sergio, Vargas-Téllez, Irma & Molina-Ortega, Madeline Getzemany, 2017, Description of first zoeal stage of Cardisoma crassum Smith, 1870 (Crustacea: Decapoda: Gecarcinidae), Journal of Natural History 51 (15 - 16), pp. 837-842 : 838

Cardisoma crassum

First zoea ( Figure 1 (a))

The cephalothorax. Size ( Figure 1 (b)): carapace length (CL) 0.57 – 0.60 mm; rostral, lateral and dorsal spines present, length of dorsal spine (DL) 0.33 – 0.36 mm; length of rostral spine (RL) 0.23 – 0.25 mm; tip of dorsal to tip of rostral spine (TSL) 1.13 – 1.15 mm; tip to tip of lateral carapace spines (CW) 0.69 – 0.73 mm. Rostral spine length similar to the length of the antenna. Without posterodorsal setae. Anterodorsal region, posterior and ventral margins without setae. Eyes sessile.

Antennule ( Figure 1 (c)). Uniramous. Endopod absent. Exopod unsegmented with 2 terminal aesthetascs and 2 simple setae.

Antenna ( Figure 1 (d)). Biramous. Protopod with 2 rows of well-developed spinules. Exopod half the length of the protopod, with 2 setae (1 long and 1 shorter).

Figures

Figure 1. Cardisoma crassum. (a), lateral view zoea I; (b), cephalothorax dorsal view; (c), antennule; (d), antenna; (e), mandible; (f), maxilla; (g), maxillule; (h), first maxilliped; (i), second maxilliped; (j), abdomen and telson. Scale bars = 0.1 mm.