Temporal range: Upper Carboniferous –Lower Permian
Palaeoaplysina is a genus of tabular, calcified fossils that are a component of many Late Palaeozoic reefs. The fossil acted as a baffle to trap sediment. Historically interpreted as a sponge or hydrozoan, recent studies are converging to its classification in the coralline stem group, placing it among the red algae.
The thalloid organism had a series of internal canals opening in volcano-like domes, inviting comparison to filter-feeding organisms. On the other hand, it seems to have had a calcified cellular make up akin to that of the coralline reds, suggesting that it was either a stem-group coralline or a coralline-encrusted filter feeder.
- Coralline algae#Evolution
- Other stem-group corallines:
- K. D. Anderson; B. Beauchamp (2011). "Development of a Palaeoaplysina Reef Complex, Ellesmere Island, Canadian Arctic". Recovery – 2011 CSPG CSEG CWLS Convention 1.
- Davies, G. R.; Nassichuk, W. W. (1973). "The Hydrozoan? Palaeoaplysina from the Upper Paleozoic of Ellesmere Island, Arctic Canada". Journal of Paleontology 47 (2): 251–265. JSTOR 1302890.
- Kaylee Anderson, Benoit Beauchamp (2010). "The Origin and Ecology of Late Paleozoic Palaeoaplysina in Arctic Canada: An Aberrant Ancestral Coralline Algae (?) that Grew at a Time of High Atmospheric CO2". GeoCanada.
- Vachard, D.; Kabanov, P. (2007). "Palaeoaplysinella gen. Nov. And Likinia Ivanova and Ilkhovskii, 1973 emend., from the type Moscovian (Russia) and the algal affinities of the ancestral palaeoaplysinaceae n. Comb". Geobios 40 (6): 849–860. doi:10.1016/j.geobios.2007.01.006.
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