You are here
Taxon
Antennella campanuliformis (Mulder & Trebilcock, 1909)
Nomenclature
-
Family: HalopterididaeGenus: Antennella
-
Synonyms: 1
SUMMARY
Hydrorhiza tubular.
Stems to 1 cm long, first stem internode 0.5 mm long, athecate, with 1-2 nematothecae and 1-2 proximal annulations, distal node oblique, following internodes alternately thecate and athecate. Thecate internodes 0.39-0.45 m long, almost entirely occupied by the hydrotheca, with an oblique proximal node, and a transverse distal node, 0.06-0.09 mm wide, often indistinct; athecate internode short, 0.28-0.31 mm (measured along base of hydrocladium).
Hydrothecae cup-shaped, deep, base curved, abcauline wall 0.20-0.22 mm long, concave; adcauline wall 0.21-0.25 mm long, straight, or with a slight convexity below the margin, both walls thickened, the abcauline flange extending back to the median nematotheca, Margin circular, 0.21-0.23 mm in diameter, slightly sinuated.
Nematothecae large, bithalamic, 0.08-0.10 mm long distal cup 0.05 mm in diameter, 3 on the athecate internode- 1 median, base stout, cup excavated on adcauline side, 2 laterals below hydrotheca on a very short apophysis of the hydrocladium, cups narrow, excavated on inner side, sides slightly inrolled; 1 on athecate internode, similar to others; 2 similar in shape, but larger than cauline nematothecae on the pedicel of female gonotheca, facing outwards, cups excavated on the side facing gonotheca; 1 nematotheca on male gonotheca above pedicel.
Gonothecae of both sexes on the one stem, arising beside the median nematotheca on thecate internodes, male small, 0.22-0.27 mm long, ovate, 0.10-0.14 mm wide, only on proximal stem internodes; female large, 0.64-0.66 mm in diameter, globular, only on distal internodes; female gonophore of 1 large egg surrounded by a top-shaped blastostyle.
Colour: trophosome pinkish-yellow, stolons dark brown.