BIOTIC Species Information for Obelia longissima
Researched byDr Harvey Tyler-Walters Data supplied byMarLIN
Refereed byThis information is not refereed.
Scientific nameObelia longissima Common nameA hydroid
MCS CodeD521 Recent SynonymsObelia flabellata, Obelia plana

PhylumCnidaria Subphylum
SuperclassHydrozoa ClassLeptolida
SubclassLeptothecatae OrderProboscoida
SuborderCampanulariida FamilyCampanulariidae
GenusObelia Specieslongissima

Additional InformationObelia longissima may be confused with other Obelia species. For example, Obelia dichotoma may also be elongate but lacks the regular shape and extreme length of Obelia longissima (Cornelius, 1995b). Obelia bidentata has multiple branched stems even when young. Colonies of Obelia dichotoma may be distinguished from Obelia longissima growing in rockpools in spring by its long tubular, nearly straight and darkening internodes (Cornelius, 1995b). No reliable key is available to distinguish between the medusae of Obelia species (for discussion see Cornelius, 1995b).
Taxonomy References Cornelius, 1995b, Howson & Picton, 1997, Stepanjants, 1998, Cornelius, 1990a, Cornelius, 1995a,
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