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Taxon
Sertularella vervoorti El Beshbeeshy, 2011
Nomenclature
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Family: SertulariidaeGenus: Sertularella
SUMMARY
Hydrorhiza creeping on host; no true stems present. Hydrocauli up to 35 mm long, monosiphonic, flaccid, sparingly branched, one or two branches given off subdichotomously, a hydrotheca in fork. Internodes long and slender, perisarc smooth, expanding a little distally, one hydrotheca distal on internode, node an indentation in perisarc.
Hydrothecae on front of stem, large, almost tubular; adcauline wall smooth, flatly convex, adnate part very short, convex, floor perpendicular to hydrothecal axis; abcauline wall variable in shape, faintly sinuous, concave or straight; margin of hydrotheca quadrate with four sharp cusps, separated by wide, flat embayments, rim replicated many times with fine, closely packed striae; operculum of four thick triangular valves.
Gonotheca borne beside base of hydrotheca, large, tumid, pedicel merging into body; when mature, irregularly barrel-shaped, expanding to mid-region, body with five to eight smooth annular ridges, these becoming deeper distally; apex with four equidistant cusps similar to hydrotheca, operculum of four finely striated valves. Female gonophore containing several large ova.
Colour: Clear, hyaline.