Biology:Tentaculites
| Tentaculites | |
|---|---|
| |
| Tentaculitids from the Devonian of Maryland. | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Class: | †Tentaculita |
| Order: | †Tentaculitida |
| Family: | †Tentaculitidae |
| Genus: | †Tentaculites von Schlotheim, 1820 |
| Species | |
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Tentaculites is an extinct genus of conical fossils of uncertain affinity, class Tentaculita, although it is not the only member of the class. It is known from Lower Ordovician to Upper Devonian deposits[1] both as calcitic shells with a brachiopod-like microstructure[2] and carbonaceous 'linings'.[3][4] The "tentaculites" (i.e. tentaculita) are also referred to as the styliolinids.
Affinity
The taxonomic classification of tentaculitids is uncertain. Some grouped them with pteropods, but there is no modern support and only superficial similarity.[who?][5] They may also be related to other conical shells of uncertain affinity including cornulitids, Anticalyptraea, microconchids and trypanoporids.[6] Their shell microstructure has warranted their comparison with the brachiopods and phoronids,[2][7] and the possible Ediacaran lophophorate Namacalathus.[8]
Morphology
Tentaculitids have ribbed, cone-shaped shells which range in length from 5 to 20 mm. Some species septate; their embryonic shell, which is retained, forms a small, sometimes spherical, chamber.[4]
Ecology
Some species are inferred to have been planktonic.[9]
See also
- Mari Mari Group, fossil formation in the state of Amazonas of northwestern Brazil
References
- ↑ 1.0 1.1 Traverse, A. (2007). "What Paleopalynology Is and Is Not". Paleopalynology. Topics in Geobiology. 28. pp. 1–43. doi:10.1007/978-1-4020-5610-9_1. ISBN 978-1-4020-6684-9.
- ↑ 2.0 2.1 Towe, K. M. (1978). "Tentaculites: Evidence for a Brachiopod Affinity?". Science 201 (4356): 626–628. doi:10.1126/science.201.4356.626. PMID 17794124. Bibcode: 1978Sci...201..626T.
- ↑ Wood, G.D., Miller, M.A., and Bergstrom, S.M. 2004. Late Devonian (Frasnian) tentaculite organic remains in palynological preparations, Radom−Lublin region, Poland. Memoirs of the Association of Australian Palaeontologists 29: 253–258.
- ↑ 4.0 4.1 Filipiak, P.; Jarzynka, A. (2009). "Organic Remains of Tentaculitids: New Evidence from Upper Devonian of Poland". Acta Palaeontologica Polonica 54: 111–116. doi:10.4202/app.2009.0111.
- ↑ Ager, 1963, Principles of Palaeontology
- ↑ Vinn, O. (2010). "Adaptive strategies in the evolution of encrusting tentaculitoid tubeworms". Palaeogeography, Palaeoclimatology, Palaeoecology 292 (1–2): 211–221. doi:10.1016/j.palaeo.2010.03.046. Bibcode: 2010PPP...292..211V. https://www.researchgate.net/publication/222285765. Retrieved 2014-01-11.
- ↑ Vinn, O.; Zatoń, M. (2012). "Phenetic phylogenetics of tentaculitoids — extinct problematic calcareous tube-forming organisms". GFF 134 (2): 145–156. doi:10.1080/11035897.2012.669788. https://www.researchgate.net/publication/234023270. Retrieved 2014-06-11.
- ↑ 1. Zhuravlev, A.Y., Wood, R.A., and Penny, A.M. (2015). Ediacaran skeletal metazoan interpreted as a lophophorate. Proc. R. Soc. B 282, 20151860. Available at: http://rspb.royalsocietypublishing.org/lookup/doi/10.1098/rspb.2015.1860.
- ↑ LARSSON K. (1979). "Silurian tentaculitids from Gotland and Scania". Fossils and Strata 11: 180.
Further reading
- Treatise on Invertebrate Paleontology, Part W - Miscellanea. Geological Society of America and University of Kansas Press, 1962. LCCN 53012913
Wikidata ☰ Q4130259 entry
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