Biology:Palaeoaplysina
| Palaeoaplysina | |
|---|---|
Scientific classification 
| |
| (unranked): | Archaeplastida |
| Division: | Rhodophyta |
| Class: | Florideophyceae |
| Stem group: | Corallinales |
| Order: | †Archaeolithophyllales (?) |
| Family: | †Palaeoaplysinaceae |
| Genus: | †Palaeoaplysina |
Palaeoaplysina is a genus of tabular, calcified fossils that are a component of many Late Palaeozoic reefs.[1] The fossil acted as a baffle to trap sediment. Historically interpreted as a sponge or hydrozoan,[2] recent studies are converging to its classification in the coralline stem group, placing it among the red algae.[1]
Morphology
The thalloid organism had a series of internal canals opening on one side of the body (presumably the upper side), and volcano-like protuberances on that same side 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.[3]
Distribution
The organism is widespread in the tropical and near-tropical margin of the Laurentian continent (45–15°N), but is not found elsewhere.[4] Its oldest reported occurrence is Middle Pennsylvanian (mid- to late Moscovian)[5] and youngest is the late Sakmarian.[3] It acts as an important reservoir rock for oil deposits.[3]
See also
References
- ↑ 1.0 1.1 K. D. Anderson; B. Beauchamp (2011). "Development of a Palaeoaplysina Reef Complex, Ellesmere Island, Canadian Arctic". Recovery – 2011 CSPG CSEG CWLS Convention 1. http://www.cseg.ca/conventions/abstracts/2011/259-Development_of_a_Palaeoaplysina_Reef_Complex.pdf. Retrieved 2011-06-14.
- ↑ 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.
- ↑ 3.0 3.1 3.2 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. http://www.geocanada2010.ca/program/program-schedule/posters.html. Retrieved 2011-06-14.
- ↑ 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.
- ↑ Ritter, Scott M.; Morris, Thomas H. (August 1997). "Oldest and Lowest Latitudinal Occurrence of Palaeoaplysina: Middle Pennsylvanian Ely Limestone, Burbank Hills, Utah". PALAIOS 12 (4): 397. doi:10.2307/3515339. Bibcode: 1997Palai..12..397R. http://palaios.geoscienceworld.org/content/12/4/397.abstract?ijkey=f53b94d37008daac73e9021ae3cdee854d54d284&keytype2=tf_ipsecsha&cited-by=yes&legid=palaios;12/4/397#cited-by. Retrieved 11 November 2014.
Wikidata ☰ Q7126388 entry
 |  |
