Plumularioidea
Plumularioidea is a superfamily of hydrozoans in the order Leptothecata. This superfamily unites about 45 genera in the following families: * Aglaopheniidae Marktanner-Turneretscher, 1890 * Halopterididae Millard, 1962 * Kirchenpaueriidae Stechow, 1921 * Phylactothecidae Stechow, 1921 * Plumaleciidae Choong & Calder, 2018 * Plumulariidae McCrady, 1859 * Schizotrichidae Peña Cantero, Sentandreu & Latorre, 2010 These thecate hydroids grow in erect colonies, branched in some species but unbranched in others. Each branch may bear a single or several animals. In the latter case the hydrothecae are arranged in a neat single file; in either case they are not set on stalks but grow from the branches directly. The hydrothecase have a cusped or even rim and instead of a diaphragm a well-defined floor with a hydropore that is usually off-center. The hydranths have a conical hypostome and a single whorl of thread-like tentacles. The gastrodermis Gastrodermis (from Ancie ...
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