The larval development of the swimming crab Thalamita pelsarti Montgomery was studied from the first zoea to megalopa under laboratory conditions. Five zoeal stages and one megalopa are identified, and detailed descriptions and illustrations are provided for each stage. At an average salinity and temperature of 34 ± 1‰ and 24 ± 1°C, the megalopa was attained 17 days after hatching. Morphologically, the first zoea of T. pelsarti is similar to those of other species of Thalamita in having a lateral spines on the carapace, one plus six setae on the endopod of the maxillule, two plus four setae on the endopod of the maxilla, and three pairs of serrate setae on the posterior margin of the telson furca. The differences between the first zoea and megalopa of T. pelsarti and those of its congeners are discussed briefly.
Russian Journal of Marine Biology – Springer Journals
Published: May 16, 2005
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