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Service Notice

The Western Australian Herbarium’s collections management system and census were set to read-only mode on 1 October 2025. Taxonomic updates published since this time are not being reflected in Florabase, herbarium collections, or Western Australia’s taxonomic names census (Nomos). Conservation listings displayed on Florabase may also be out of date. Please refer to DBCA’s Threatened species and communities webpage for the most recent Threatened and Priority Flora List, noting that recent taxonomic updates are similarly not included. Our database migration is moving to a staging phase. We thank you for your patience as we ensure the integrity of our biodiversity data, develop new workflows, and train staff to use the new systems. Please reach out to us if you have any questions or concerns.

The notice period started at 12:00 pm on Wednesday, 1 October 2025 +08:00 and will end at 12:00 pm on Friday, 1 January 2027 +08:00.

Xiphosiphonia pinnulata (Kütz.) Savoie & G.W.Saunders

Reference
Botany (Ottawa) 94:926 (2016)
Conservation Code
Not threatened
Naturalised Status
Native to Western Australia
Name Status
Current

Scientific Description

Habit and structure. Thallus light red. Prostrate axes 50–90 µm diam., attached by elongate rhizoids arising from pericentral cells; rhizoids terminating in a digitate multicellular pad. Scar cells present on most segments of prostrate axes, but absent on erect axes. Erect axes to 3.5 mm tall, with alternate distichous branching, the determinate lateral branches arising from every second segment. Lateral branches 350–500 µm long, 40–55 µm diam., mostly of uniform diameter but tapering near the apex to a blunt point, with 6 pericentral cells, fusing laterally only slightly with the bearing branch. Trichoblasts absent.

Reproduction. Not observed.

Distribution. Known from the British Isles, south-western France, Portugal, southern Spain, California and Japan. Also reported from the Montebello Islands, north-western Australia.

[After J.M. Huisman in Algae of Australia: Marine Benthic Algae of North-western Australia, 2. Red Algae: 582–583 (2018)]

John Huisman & Olga Nazarova, 3 August 2021

Distribution

IMCRA Regions
Pilbara (offshore).
Local Government Areas (LGAs)
Karratha.