The zoeal stages of Hymenosoma orbiculare Desmarest, 1825 are described and illustrated from materials hatched in the laboratory and plankton collected in the field. A comparison with other hymenosomatid larvae is tabulated and discussed. The present description agrees with typical larval characters of the Hymenosomatidae, and shows a number of differences in relation to previous descriptions.
- Hymenosoma orbiculare
- larval description