Their affinity is uncertain. They were considered by E. L. Yochelson 1968[citation needed] to belong to Mollusca, whereas Runnegar and Pojeta (1974) suggested that they might be 'bivalved monoplacophorans'. This said, the morphology of the shell does not resemble the shell of any other class of molluscs;[4] they also look a little like brachiopods[1] It's not clear whether their two valves are each other's mirror images, as in bivalve molluscs, though they aren't identical to one another [?].[1] It's more likely that the valves each have a single plane of symmetry (as in brachiopods), suggesting a brachiopod affiliation.[1]
As with many other Cambrian taxa,[5][6] it has been suggested that they arise through reduction of a Halkieria-like ancestor.[1]
^ abcdeKouchinsky, Artem V. (2000). "15. Mollusks, Hyoliths, Stenothecoids, and Coeloscleritophorans". Molluscs, hyoliths, stenothecoids, and coeloscleritiphorans. pp. 326–349. doi:10.7312/zhur10612-015. ISBN9780231505161.
^ abKouchinsky, A. V., Bengtson, S., Runnegar, B.N., Skovsted, C.B., Steiner, M., and Vendrasco, M.J. (2012). Chronology of early Cambrian biomineralization. Geol. Mag. 149, 221–251.
^Yochelson, Ellis L. (1969). "Stenothecoida, A Proposed New Class of Cambrian Mollusca". Lethaia. 2: 49–62. doi:10.1111/j.1502-3931.1969.tb01250.x.
^Peel (2021). "Peel,J.S. 2021, Pseudomyona from the Cambrian of... Bulletin of Geosciences, 96, 195-215". {{cite journal}}: Cite journal requires |journal= (help)
^1. Cohen, B.L., Holmer, L.E., and Lüter, C. (2003). The brachiopod fold: a neglected body plan hypothesis. Palaeontology 46, 59–65.
^Skovsted, C.B., Betts, M.J., Topper, T.P., and Brock, G.A. (2015). The early Cambrian tommotiid genus Dailyatia from South Australia. Mem. Assoc. Australas. Palaeontol. 48, 1–117.
^Kouchinsky, A. V. et al. Chronology of early Cambrian biomineralization. Geol. Mag. 149, 221–251 (2012).
Start of article at Springer Reference
Paleobiology Database info on this class
Abstract of a Yochelson 2007 article on the proposed class
This prehistoric mollusc article is a stub. You can help Wikipedia by expanding it.
stenothecoida, confused, with, stenothecidae, taxon, bivalved, fossils, from, early, middle, cambrian, period, they, look, like, brachiopods, bivalve, molluscs, temporal, range, early, cambrian, preꞒ, nscientific, classificationdomain, eukaryotakingdom, animal. Not to be confused with Stenothecidae Stenothecoida is a taxon of bivalved fossils from the Early to middle Cambrian period They look a bit like brachiopods or bivalve molluscs StenothecoidaTemporal range Early mid Cambrian 525 500 Ma 1 2 PreꞒ Ꞓ O S D C P T J K Pg NScientific classificationDomain EukaryotaKingdom AnimaliaSuperphylum LophotrochozoaClass StenothecoidaYochelson 1968 3 GeneraStenothecoides ResserBagenovia RaduginCambridium Horny 1957Bagenoviella AksarinaSulcocarina AksarinaKaschkadakia AksarinaMakarakia Aksarin given in JSTOR 1739764 Contents 1 Affinity 2 Mineralogy 3 Occurrence 4 ReferencesAffinity editTheir affinity is uncertain They were considered by E L Yochelson 1968 citation needed to belong to Mollusca whereas Runnegar and Pojeta 1974 suggested that they might be bivalved monoplacophorans This said the morphology of the shell does not resemble the shell of any other class of molluscs 4 they also look a little like brachiopods 1 It s not clear whether their two valves are each other s mirror images as in bivalve molluscs though they aren t identical to one another 1 It s more likely that the valves each have a single plane of symmetry as in brachiopods suggesting a brachiopod affiliation 1 As with many other Cambrian taxa 5 6 it has been suggested that they arise through reduction of a Halkieria like ancestor 1 Mineralogy editThought to be low Mg calcite 7 Occurrence editThe earliest occurrence dates to 525 Ma 2 These fossil shells have been found in Canada China Greenland Kazakhstan Kyrgyzstan and the USA References edit a b c d e Kouchinsky Artem V 2000 15 Mollusks Hyoliths Stenothecoids and Coeloscleritophorans Molluscs hyoliths stenothecoids and coeloscleritiphorans pp 326 349 doi 10 7312 zhur10612 015 ISBN 9780231505161 a b Kouchinsky A V Bengtson S Runnegar B N Skovsted C B Steiner M and Vendrasco M J 2012 Chronology of early Cambrian biomineralization Geol Mag 149 221 251 Yochelson Ellis L 1969 Stenothecoida A Proposed New Class of Cambrian Mollusca Lethaia 2 49 62 doi 10 1111 j 1502 3931 1969 tb01250 x Peel 2021 Peel J S 2021 Pseudomyona from the Cambrian of Bulletin of Geosciences 96 195 215 a href Template Cite journal html title Template Cite journal cite journal a Cite journal requires journal help 1 Cohen B L Holmer L E and Luter C 2003 The brachiopod fold a neglected body plan hypothesis Palaeontology 46 59 65 Skovsted C B Betts M J Topper T P and Brock G A 2015 The early Cambrian tommotiid genus Dailyatia from South Australia Mem Assoc Australas Palaeontol 48 1 117 Kouchinsky A V et al Chronology of early Cambrian biomineralization Geol Mag 149 221 251 2012 Start of article at Springer Reference Paleobiology Database info on this class Abstract of a Yochelson 2007 article on the proposed class nbsp This prehistoric mollusc article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Stenothecoida amp oldid 1153150933, wikipedia, wiki, book, books, library,
