Abstract

NAEGEL, Ludwig C.A.  and  GOMEZ DEL PRADO-ROSAS, Ma. del Carmen. Embryonic and intracapsular larval development of Plicopurpura pansa (Gould, 1853) (Prosobranchia, Muricidae) under laboratory conditions. Cienc. mar [online]. 2004, vol.30, n.2, pp.297-310. ISSN 0185-3880.

The embryonic development of the marine muricid Plicopurpura pansa (Gould, 1853) until hatching is described. Each female spawned about 150 egg capsules in a 10-week period. The egg showed spiral segmentation, followed by gastrulation through epiboly, the formation of a non-typical trochophore and veliger larva. The embryos fed on the egg yolk. Nurse eggs were not observed. In 13% of the egg capsules, different embryonic or larval stages of development were found in the same capsule. At 21-23°C the intracapsular development was completed with the hatching of planktotrophic veliger larvae after a period of 5 to 8 weeks.

Keywords : gastropods; muricids; Plicopurpura pansa; embryogenesis; intracapsular development.

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