Caulerpa simpliciuscula (Turner) C.Agardh
Spec.Alg. 439 (1822)

Conservation Code: Not threatened
Naturalised Status: Native to Western Australia
Name Status: Current

Distribution

Beard’s Provinces: South-West Province.

IBRA Regions: Geraldton Sandplains, Swan Coastal Plain.

IBRA Subregions: Geraldton Hills, Perth.

IMCRA Regions: Abrolhos Islands, Central West Coast, Eyre, Leeuwin-Naturaliste.

Local Government Areas (LGAs): Busselton, Cockburn, Dandaragan, Greater Geraldton, Irwin, Rockingham.

Scientific Description
John Huisman & Cheryl Parker, Thursday 8 September 2016

Habit and structure. Stolon slender to moderate, 1–2 mm in diameter, naked, epilithic. Erect fronds medium to dark green, with simple or often branched axes, usually 4–30 cm high and (2.5–) 3–5 mm across, axes 1–2 mm in diameter, densely covered from their bases by vesiculate ramuli with 8–14 around the axis. Ramuli ovoid-pyriform to clavate, 0.7–1.5 mm long and 300–700(–950) µm in diameter where broadest below apices, constricted immediately adjacent to the axis or with only a very slight protuberance.

Distribution. From Port Denison, W. Aust., to Walkerville, Vic., and around Tas.

Habitat. Common in rock pools and the upper sublittoral on rough-water coasts, extending into bays with moderate water movement, recorded to 38 m deep.

[After Womersley, Mar. Benthic Fl. Southern Australia I: 273 (1984)]