genus Hydra

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Noun1.genus Hydra - hydras
coelenterate genus - a genus of coelenterates
class Hydrozoa, Hydrozoa - coelenterates typically having alternation of generations; hydroid phase is usually colonial giving rise to the medusoid phase by budding: hydras and jellyfishes
hydra - small tubular solitary freshwater hydrozoan polyp
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References in periodicals archive ?
The genus Hydra is classified into four species groups: viridissima, braueri, oligactis, and vulgaris, based on morphological and molecular phylogenetic analyses (Campbell, 1983, 1987, 1989; Hemmrich et al., 2007; Kawaida et al., 2010; Martinez et al., 2010; Schwentner and Bosch, 2015).
Molecular phylogenetic study in genus Hydra. Gene 468: 30-40.
Revisiting the age, evolutionary history and species level diversity of the genus Hydra (Cnidaria: Hydrozoa).