Scientia Marina, Vol 67, No 4 (2003)

Larval development of Clastotoechus nodosus (Streets, 1872) (Crustacea: Decapoda: Porcellanidae), under laboratory conditions


https://doi.org/10.3989/scimar.2003.67n4419

Gonzalo Hernández
Universidad de Oriente, Venezuela, Bolivarian Republic of

Isabel Magán
Universidad de Oriente, Venezuela, Bolivarian Republic of

Karen Graterol
Universidad de Oriente, Venezuela, Bolivarian Republic of

Juan Ignacio Gaviria
Universidad de Oriente, Venezuela, Bolivarian Republic of

Juan Antonio Bolaños
Universidad de Oriente, Venezuela, Bolivarian Republic of

Carlos Lira
Universidad de Oriente, Venezuela, Bolivarian Republic of

Abstract


The larval development of Clastotoechus nodosus is described and illustrated from specimens obtained from four females collected in shallow waters from Cubagua island, Venezuela (southeastern Caribbean) and reared in the laboratory. C. nodosus hatches as a prezoea of less than 60 minutes´ duration and then molts through two subsequent zoeal stages of 5-7 and 9-13 days´ duration respectively, at 25ºC and 37‰ salinity, before attaining the megalopa. There are major differences between the two zoeal stages and megalopa of C. nodosus and the only other congeneric species with known larval development [i.e. C. vanderhorsti (Schmitt, 1924); sin. Madarateuchus vanderhorsti]. Interspecific differences are striking in the setal formula of several appendages (e.g. antennulae, antennae, maxillulae, maxillae, and maxillipeds). The postorbital spines exhibited by the second zoeal stage of C. nodosus are a novelty for larvae of any porcellanid species described so far from the Americas.

Keywords


zoea; megalopa; Caribbean

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