Service Notice

The Western Australian Herbarium’s collections management system, WAHerb, and DBCA’s flora taxonomic names application, WACensus, have been set to read-only mode since 1 October 2025. Recent taxonomic changes are not currently being reflected in Florabase, herbarium collections, or the census. Due to the rapidly approaching holiday season and associated agency and facility soft closures, along with the substantial work involved in data mapping, cleaning, and verification, the migration to the new collection management software is not expected to occur before 1 March 2026, when a further update will be provided. Please reach out to us if you have any questions or concerns.

The notice period started at 9:45 am on Friday, 12 December 2025 +08:00 and will end at 12:00 pm on Monday, 2 March 2026 +08:00.

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Chaetomorpha basiretrorsa Setch.

Reference: Univ.Calif.Publ.Bot. 12:72, Pl. 8, Figs 4-6 (1926)
Conservation Code: Not threatened
Naturalised Status: Native to Western Australia
Name Status: Current

Scientific Description

Habit and structure. Thallus forming dense prostrate mats composed of stiff irregularly curved decumbent filaments attached by numerous rhizoidal branchlets, septate or non-septate. Cells (225-) 275–400 (–550) µm diam. [L:B 0.75–3 (–4)].

Distribution. Widespread in the Indian and Pacific Oceans.

Habitat. Generally epilithic in the high intertidal, on rock associated with sand.

[After Huisman & Leliaert, Algae of Australia: Mar. Benthic Algae of North-western Australia, 1. Green and Brown Algae 49 (2015)]

Distribution

IBRA Regions: Pilbara.
IBRA Subregions: Roebourne.
Local Government Areas (LGAs): Karratha.