4.0 Article

Early larval development of the rock shrimps Sicyonia dorsalis Kingsley, 1878 and S. typica (Boeck, 1864) (Dendrobranchiata) with remarks of larval morphology of Sicyoniidae Ortmann, 1898

Journal

BIOTA NEOTROPICA
Volume 22, Issue 4, Pages -

Publisher

REVISTA BIOTA NEOTROPICA
DOI: 10.1590/1676-0611-BN-2022-1404

Keywords

Decapoda; larval morphology; metanauplius; nauplius; Penaeoidea; protozoea

Funding

  1. Sao Paulo Research Foundation - FAPESP [BIOTA 2010/50188-8, BIOTA INTERCRUSTA 2018/13685-5, 2020/14484-3]
  2. Coordination for the Improvement of Higher Education Personnel - CAPES [001, 2005/2014 - 23038.004308/2014-14]
  3. Brazilian National Council for Scientific and Technological Development - CNPq [PQ 302253/2019-0, PQ 306672/2018-9]
  4. CAPES

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This study describes the early larval stages of Sicyonia dorsalis and S. typica obtained under laboratory conditions, and compares their morphology with other species in the same genus. The results show that the larval and PZI stages of these two species are similar, suggesting that morphological differences may arise later during development. More data on different species is needed for generalizations and conclusions to be made.
The aim of this study was to describe and illustrate the early larval stages, i.e., the complete naupliar development and the first protozoea (PZI) of Sicyonia dorsalis and S. typica obtained under laboratory conditions. We also provide remarks from a comparative analysis of the morphology of these stages among representatives of the genus and furnish morphological characteristics to distinguish them from another penaeoidean in the plankton. Our results indicate that the naupliar development of Sicyonia is composed of five stages (NI to NV). No differences were found in the morphology of the naupliar and PZI stages of the two studied species, even though they are considered phylogenetically distant into the genus. We suspect that morphological differences arise later during ontogenetic development. The comparisons with larval descriptions of congeners revealed that naupliar stages and PZI were very similar, nevertheless, some morphological differences were observed. As illustrated here, there is a clear need of new descriptions of the studied group and generalizations and conclusions of larval morphology patterns at this point need to be made with caution, because data of a still insufficient number of species is available.

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