Phialella quadrata (Forbes, 1848)

Fig. 1. B-G, Phialella quadrata, mature stem from Western Port, Victoria. C, hydrotheca showing opercular segments. D, immature gonothecae. E, newly released medusa from colony from Western Port, living specimen. F, eight tentacle stage medusa from Port Kembla, New South Wales, preserved material. G, discharged microbasic mastigophore from newly released medusa. Bar scales: C, D, 0.2 mm; B, E, 1 mm; F, 3 mm; G, 10 µm.

From Watson, J.E. (1994) New records and redescriptions of thecate hydroids from southern Australia. Proceedings of the Royal Society of Victoria 106: 147-162.

Photographer: Watson, Jeanette. Publisher: Watson, Jeanette.