The morphology of the larval and juvenile shell of Pododesmus macrochisma (Deshayes, 1839) (Bivalvia: Anomiidae)

Abstract

For the first time the data on the morphology of the larval and early juvenile shell of Pododesmus macrochisma (Deshayes, 1839), which is the only species of the Anomiidae family that inhabits the Peter the Great Bay, is given. The basic attribution characters of larval shell of this species at the veliconcha stage are the absence of the eye, the dark color of the shell, a shell height: length ratio that is nearly one, and the presence of four to five denticles at each side of the provinculum. A description of the early juvenile shell is given. The results of the study can be used to identify larvae in the plankton and early settled juveniles.