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The Morphology of the Naupliar Stages of Sacculina carcini (Crustacea: Cirripedia: Rhizocephala)
Author(s) -
Collis Sarah A.,
Walker Graham
Publication year - 1994
Publication title -
acta zoologica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.414
H-Index - 37
eISSN - 1463-6395
pISSN - 0001-7272
DOI - 10.1111/j.1463-6395.1994.tb00966.x
Subject(s) - biology , barnacle , crustacean , morphology (biology) , anomura , zoology , anatomy , decapoda
A morphological study was carried out on the four naupliar stages of Sacculina carcini using mainly scanning electron microscopy. Frontal horns were present and throughout development the typical nauplius limbs remained simple and gnathobases were lacking. Such features are characteristic of other lecithotrophic barnacle nauplii. The presence of a vestigial ventral thoracic process was evident on the stage III nauplius and was even more prominent on the stage IV nauplius. These observations confirm that the rhizocephalan nauplius is close to the thoracican nauplius form and lend strong support for the retention of the Rhizocephala within the Cirripedia.