Holotype: NMV F82730, microslide preparation of colony mounted in Malinol, Geelong Arm of Port Phillip Bay, Victoria, Australia, 38°06'S 144°31Έ, depth 10 m.
Paraptype: NMV F82731, microslide preparation of colony mounted in Malinol; Geelong Arm of Port Phillip Bay, Victoria, Australia 38°06'S 144°29Έ, depth 12 m.
Refers to the type locality of Port Phillip Bay in southern Australia.
Colonies minute.
Hydrorhiza consisting of several threadlike stolons creeping over internal wall of worm tube. Pedicels arising at stolonal junctions, simple, unbranched or sometimes with a single branch, cylindrical to cigar shaped, narrowest at base, widening just above hydrorhiza, diameter then much the same throughout; perisarc firm, deeply annulated or ridged.
Hydrotheca bud-shaped (when closed), radially symmetrical, floor flat, no diaphragm, perisarc very thin and transparent, somewhat thicker at base, distal half to one third consisting of many thin, folded segments converging at apex, no crease line separating segments from body. When hydrotheca is shed, the base remains as a shallow saucer shaped platform with slightly everted rim; the base may be regenerated up to five times, the topmost platform often with a ring of desmocytes just below rim.
Hydranth with a circlet of 14-16 long moniliform tentacles held stiffly outwards and connected by a conspicuous intertentacular web.
Nematocysts of two kinds present in hydranth:
i) Abundant haplonemes (?holotrichous isorhizas) in tentacles; capsule elongate oval, 67 x 1.52 µm, tube isodiametric, at least 22 µm long, armed throughout length with spirals of fine bristles.
ii) Slightly larger haplonemes in lower part of hypostome; capsule bean shaped, 8 x 3 µm, insufficiently discharged to enable confident identification or measurement of tube.
Colour: Colourless and transparent.
Southeastern Australia (Victoria).
Subtidal, inhabiting polychaete burrows in soft sediments.