Description of first zoeal stage of Cardisoma crassum Smith, 1870 (Crustacea: Decapoda: Gecarcinidae) Author Vázquez-López, Horacio Author Cházaro-Olvera, Sergio Author Vargas-Téllez, Irma Author Molina-Ortega, Madeline Getzemany text Journal of Natural History 2017 2017-03-31 51 15 - 16 837 842 http://dx.doi.org/10.1080/00222933.2017.1302611 journal article 10.1080/00222933.2017.1302611 1464-5262 5180794 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).