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Taxon
Halecium ovatum Totton, 1930
Nomenclature
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Family: HaleciidaeGenus: Halecium
SUMMARY
Colony minute, stolonal; stolons tubular, walls crumpled, thin.
Primary hydrophore seated on a short apophysis of the stolon, a transverse to weakly oblique node at base; hydrophore relatively long, cylindrical, smooth, gradually expanding to hydrotheca. Secondary and tertiary hydrophores arising in a series without basal node from diaphragm of preceding hydrotheca; successive hydrophores progressively shorter. Branching of hydrophore at right angles from below a hydrotheca common, secondary hydrophores shorter, with 2 or 3 partial basal constrictions.
Hydrotheca shallow, expanding smoothly from well marked diaphragm to wide margin with strongly recurved and outrolled rim, a clear ring of desmocytes above diaphragm. Perisarc of hydrorhiza very thin, that of hydrophores thicker, rim of hydrotheca thin.
Colour: Colourless.