Aegina (genus): Brief Summary
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Aegina citrea is a genus of hydrozoans in the family Aeginidae.
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Diagnosis
provided by World Register of Marine Species
Aeginidae with 8-12 stomach pouches; with a peripheral canal system; with four to six primary tentacles; pouches begin at points of origin of primary tentacles; tentacle roots large, recurved apically, penetrating deep into central mesoglea; deep peronial grooves lined with nematocysts extending from umbrella margin to above points of origin of primary tentacles; without secondary tentacles on umbrella margin; without otoporpae.
Lindsay, D. J.; Grossmann, M. M.; Bentlage, B.; Collins, A. G.; Minemizu, R.; Hopcroft, R. R.; Miyake, H.; Hidaka-Umetsu, M.; Nishikawa, J. (2017). The perils of online biogeographic databases: a case study with the ‘monospecific' genus Aegina (Cnidaria, Hydrozoa, Narcomedusae). Marine Biology Research. 13(5): 494-512.
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