- Reference
- Algae of Australia: Marine Benthic Algae of North-western Australia, 2. Red Algae 514-515, Fig. 149A-E (2018)
- Conservation Code
- Not threatened
- Naturalised Status
- Native to Western Australia
- Name Status
- Current
Scientific Description
Habit and structure. Thallus with prostrate axes bearing lateral indeterminate and dorsal determinate branches alternately, the successive indeterminate branches on alternate sides. Prostrate axes 70–90 µm diam., with 9 pericentral cells [mature segment L:B 2–2.6], attached to the substratum by elongate unicellular rhizoids arising from the ventral surface, distal on each segment. Determinate branches arising from the same dorsal position (i.e. not deflected from side to side), more than 7 mm and 40 segments long; basal segment short, with 4 pericentral cells, suprabasal segment with 7 or 8 pericentral cells, then more distal segments with 11–16 pericentral cells. Developing determinate branches strongly curved, 55–75 µm diam. [segment L:B to 1], initially lacking trichoblasts but these arising later on up to 10 apical segments in a spiral pattern. Mature branches 70–85 µm diam. [segment L:B 2–2.5]. Trichoblasts initially secund, becoming subdichotomous, to 1.2 mm long at maturity.
Distribution. Known only from Mermaid Reef, Rowley Shoals, Western Australia.
Habitat. epiphytic on Pterocladiella caerulescens in the subtidal.
[After J.M. Huisman in Algae of Australia: Marine Benthic Algae of North-western Australia, 2. Red Algae: 514–515 (2018)]