Hebella dyssymetra
General description:
Colony stolonal, hydrorhizal stolons tubular, fairly smooth, creeping on stem of host.
Hydrothecae arising at intervals from hydrorhiza, pedicels very short to virtually absent; hydrotheca deeply campanulate, asymmetrical, walls smooth, widening from base to margin, one wall usually more convex than other, walls becoming weakly concave below margin; diaphragm obscured by shallow concave base of hydranth; margin circular, wide, oblique to hydrothecal axis, rim may be everted into a wide, delicately recurved flange.
Hydranth with ca. 14 tentacles. Perisarc fairly thin, thicker at base of hydrotheca, very thin on rim.
Colour: white (preserved material).
Distribution:
Circumglobal tropical and subtropical.
Habitat:
Subtidal, epizoic on other hydroids.