Uronema marina Womersley
The marine benthic flora of southern Australia. Part I 131, fig. 41D,E (1984)
Conservation Code:
Not threatened
Naturalised Status: Native to Western Australia
Name Status:
Current
Scientific Description
John Huisman & Cheryl Parker,
Monday 20 June 2011
Habit and structure. Thallus of microscopic filaments to 200(–250) µm high, unbranched, straight to slightly curved, each arising from a basal, gelatinous, conical attachment on a variety of hosts, forming a tomentum on the host. Filaments increasing in diameter from the base upwards, 4–6 µm in diameter and L/B 4–6 in the upper cells, not or slightly incised at the cross walls; apical cells terete with a rounded end, becoming reproductive and soon lost, leaving wall remnants (often with bacteria) on the then apical cell; chloroplast single, occupying most of the cell but usually with invaginations at one or both ends, with a single (rarely two) prominent pyrenoid; wall about 1 µm thick, cross walls 1–2 µm thick.
Reproduction. By zooids formed in the slightly swollen terminal cell (occasionally in the subterminal cell), with a lateral pore; terminal cell lost soon after discharge of zooids.
Distribution. Known from numerous locations in W. Aust., and from Kellidie Bay, Coffin Bay, S. Aust.
[After Womersley, Mar. Benthic Fl. Southern Australia I: 131 (1984)]
