Limnomedusae Kramp, 1938

Calder, Dale R., 2010, Some anthoathecate hydroids and limnopolyps (Cnidaria, Hydrozoa) from the Hawaiian archipelago 2590, Zootaxa 2590 (1), pp. 1-91 : 72

Order Limnomedusae Kramp, 1938

Limnomedusae Kramp, 1938: 107 .

Diagnosis. Hydrozoa with polyps solitary or primitively colonial; hydranths small to minute, morphologically simple, sessile, lacking hydrothecae; hypostome, mouth, and gastric cavity present or absent; tentacles and perisarcal sheath present or absent; asexual reproduction frequent, by frustules, or frustule-like buds, or cysts.

Gonophores fixed or free eumedusoids, or medusae. Medusae, when present, with hemispherical to discoidal umbrella; tentacles hollow, lacking basal bulbs; marginal sense organs, when present, comprising internal statocysts; gonads on radial canals or manubrium.

Remarks. The history and phylogeny of Limnomedusae Kramp, 1938 has been reviewed by Daly et al. (2007) and Collins et al. (2008). Bouillon et al. (2006) included 21 genera in the family, many of them poorly known ( Jankowski 2001) and over half (12) being monotypic.