| Popis: |
Eight zoeal larval forms and the postlarval form of the prawn, Palaemon floridanus Chace, 1942, are described, based on laboratory reared animals that passed through as few as 8 or as many as 16 larval instars. This "extended" pattern of larval development was found to be consistent over the genus as a whole, regardless of the wide range of salinity occupied by different species. Structural characteristics that are shared by larvae of all Palaemon spp. thus far examined are presented. A more detailed analysis of larval morphology of temperate-tropical American species of Palaemon and Palaemonetes revealed more differences within than between the two genera, suggesting that they are more closely related than previously regarded. Se describen ocho fases larvarias (zoeas) y la fase postlarva del camaron Palaemon floridanus Chace, 1942, basadas en ejemplares cultivados en laboratorio y que contenian solamente entre 8 y 16 etapas larvarias. Este patron "extendido" del desarrollo larvario fue observado en todo el genero, a pesar del amplio rango de salinidades que habitan las diferentes especies. Se describen, asimismo, las caracteristicas estructurales comunes a las larvas de todos los Palaemon spp. Un analisis mas detallado de la morfologia larvaria de las especies tropicales/templadas americanas de Palaemon y Palaemonetes revelo mas diferencias intra que intergenericas, sugiriendo que ambos generos estan mas relacionados entre si de lo que se creia anteriormente. |
