Ostreobium quekettii (Codiales, Chlorophyta)

Abstract

Ostreobiurn quekettii (Codiales, Chlorophyta). The shell-inhabiting, marine alga Ostreobium quekettii Bornet & Flahault is a distinct species reproducing by zoospores with four flagella. Sporangium formation and the development of zoospores are described. The material obtained from Helgoland (North Sea) is assumed to be identical with the type specimen from the French Atlantic coast. O. quekettii is said to be of worldwide distribution; in the absence of further information, it must be doubted whether other finds reported to belong to this species are identical with the type species. EINLEITUNGEs gibt wohl keine Alge, fiber die in der Literatur so viele einander widersprechende und so wenige klare Angaben vorliegen wie yon Ostreobium quekettii. Die

Bioerosion along a bathymetric gradient in a cold-temperate setting (Kosterfjord, SW Sweden): an experimental study

“…Remarks: The larger cavities encountered as parts of the colonies closely resemble the sporangial cavities as observed by Kornmann and Sahling (1980) in culture. Where several collar-like swellings appear along the main galleries, Reticulina elegans bears similarities to "Palaeoconchocelis starmachii".…”

Endolithic Algae Affect Modern Coral Carbonate Morphology and Chemistry

“…The annual linear extension varied between 0.3 and 0.9 cm year −1 with a mean linear extension of 0.7 cm (SD 0.2 cm, n = 11) cm year −1 for BB1 and 0.6 cm (SD 0.2 cm, n = 11) cm year −1 for BB3. Based on comparison with previous studies (e.g., Kornmann and Sahling, 1980;Le Campion-Alsumard et al, 1995;Yamazaki et al, 2008), thalli networks, which are characteristic for the green algae genus Ostreobium, were identified in the green bands using light and epifluorescence microscopy (Figure 3). The thalli were siphonal filaments with a diameter of approximately 5 µm and a length of several hundred micrometers ( Figures 3B,C,F,G).…”

Cladistics of the Bryopsidales: A Preliminary Analysis

“…This suborder comprises three of the traditional families recognized by Silva (1982): Bryopsidaceae (Bryopsidella, Bryopsis, Derbesia, Lambia, Pedobesia, and Trichosolen), Codiaceae (Codium and Pseudocodium), and Ostreobiaceae (Ostreobium). The Ostreobiaceae is traditionally separated from other homoplastic families because of (1) an unusual ability to live in calcareous substrates, (2) a lack of obvious upright portions, (3) presence of sporadic septa throughout the vegetative siphons, and (4) quadriflagellate spores (Lukas 1974, Kornmann andSahling 1980). Diagnostic characters of the Bryopsidaceae include a uniaxial morphology and sporic meiotic life cycle, whereas characters of the Codiaceae include multiaxial morphologies and a gametic meiotic life cycle.…”