en Turcutheca

Turcutheca; Temporal range: Early Cambrian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Brachiopoda
Class:	†Hyolitha
Order:	†Orthothecida (?)
Family:	†Circothecidae
Genus:	†Turcutheca

Turcutheca is a Tommotian (Early Cambrian) genus of shelly fossil whose affinities are uncertain, generally considered as an orthothecid hyolith^[2] (which would make it a brachiopod,^[3] but also resembling the ellesmeroceratids (early cephalopods).^[1]

References

^ ^a ^b Dzik, J. (2010). "Brachiopod Identity of the Alleged Monoplacophoran Ancestors of Cephalopods". Malacologia. 52 (1): 97–113. doi:10.4002/040.052.0107.
^ e.g. Brasier, M. D. (1986). The succession of small shelly fossils (especially conoidal microfossils) from English Precambrian–Cambrian boundary beds. Geological Magazine, 123(3), 237–256. doi:10.1017/S0016756800034737
^ Moysiuk, Joseph; Smith, Martin R; Caron, Jean-Bernard (2017). "Hyoliths are Palaeozoic lophophorates" (PDF). Nature. 541 (7637): 394–397. Bibcode:2017Natur.541..394M. doi:10.1038/nature20804. PMID 28077871.

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[Dzik2010-1] Dzik, J. (2010). "Brachiopod Identity of the Alleged Monoplacophoran Ancestors of Cephalopods". Malacologia. 52 (1): 97–113. doi:10.4002/040.052.0107.

[2] .g. Brasier, M. D. (1986). The succession of small shelly fossils (especially conoidal microfossils) from English Precambrian–Cambrian boundary beds. Geological Magazine, 123(3), 237–256. doi:10.1017/S0016756800034737

[3] Moysiuk, Joseph; Smith, Martin R; Caron, Jean-Bernard (2017). "Hyoliths are Palaeozoic lophophorates" (PDF). Nature. 541 (7637): 394–397. Bibcode:2017Natur.541..394M. doi:10.1038/nature20804. PMID 28077871.

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