Migotto, A. E.; Caobelli, J. F.; Kubota, S. (2004). Redescription and life cycle of Eutima sapinhoa Narchi and Hebling, 1975 (Cnidaria: Hydrozoa, Leptothecata): a hydroid commensal with Tivela mactroides (Born) (Mollusca, Bivalvia, Veneridae). Journal of Natural History. 38(20): 2533-2545.

38497

10.1080/00222930310001647316 [view]

Migotto, A. E.; Caobelli, J. F.; Kubota, S.

2004

38(20): 2533-2545

Publication

The commensal hydroid Eutima sapinhoa Narchi and Hebling, 1975 lives attached to the mantle, gills, labial palps and foot of the bivalve Tivela mactroides. The solitary polyps bud off medusae that become free, leaving the host through the exhalant water current. Newly liberated medusae were cultivated in the laboratory, attaining 7.8 mm in bell height, 13.3 mm in diameter and having eight marginal tentacles, while developing the typical eutimid medusa characters of a long peduncle, four radial canals and marginal statocysts with many statoliths. Eutima sp., previously reported from Florida, USA, is probably referable to Eutima sapinhoa. Like the other bivalve-inhabiting species of Eutima [E. ostrearum (Mattox and Crowell, 1951) and Eutima sp.] from the Atlantic Ocean, Eutima sapinhoa has no trace of marginal cirri, thereby differing from the eutimid medusae of the Pacific Ocean.

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Cycles, Saisonality, Phenology
Ecology
Systematics, Taxonomy

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