The Coelosclerithophorans are a polyphyletic group of organisms bearing hollow sclerites made of aragonite, and with a supposedly distinctive microstructure.[1]
Their skeletons may be homologous to those of the molluscs,[2] and Halkieria looks very much like a polyplacophoran. The shells of this group and the molluscs appear to have originated in the same fashion.[2] However, there are several reasons to doubt this relationship,[3] many of which may not pass muster.[4]
There are two groups within the coeloscleritophorans: the Sachitids, to which Halkieria and Wiwaxia belong, and the Chancellorids. The Ediacaran fossil Ausia has been touted as an ancestral 'intermediate' between both of these groups.[5]
^Porter, S. M. (2008). "Skeletal Microstructure Indicates Chancelloriids and Halkieriids Are Closely Related". Palaeontology. 51 (4): 865–879. doi:10.1111/j.1475-4983.2008.00792.x.
^ abBengtson, S. (1992). "The cap-shaped Cambrian fossil Maikhanella and the relationship between coeloscleritophorans and molluscs". Lethaia. 25 (4): 401–420. doi:10.1111/j.1502-3931.1992.tb01644.x.
^Yochelson, E. L. (1993). "Molluscan affinity of coeloscleritophorans". Lethaia. 26 (1): 47–48. doi:10.1111/j.1502-3931.1993.tb01509.x.
^Bengtson, S. (1993). "Molluscan affinity of coeloscleritophorans — reply". Lethaia. 26 (1): 48. doi:10.1111/j.1502-3931.1993.tb01510.x.
^Dzik, Jerzy (August 2009). "Possible Ediacaran Ancestry of the Halkieriids" (PDF). In Smith, Martin R.; O'Brien, Lorna J.; Caron, Jean-Bernard (eds.). Abstract Volume. International Conference on the Cambrian Explosion (Walcott 2009). Toronto, Ontario, Canada: The Burgess Shale Consortium (published 31 July 2009). ISBN978-0-9812885-1-2.
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coeloscleritophoran, coelosclerithophorans, polyphyletic, group, organisms, bearing, hollow, sclerites, made, aragonite, with, supposedly, distinctive, microstructure, coeloscleritophoratemporal, range, cambrian, ordovicianscientific, classificationdomain, euk. The Coelosclerithophorans are a polyphyletic group of organisms bearing hollow sclerites made of aragonite and with a supposedly distinctive microstructure 1 CoeloscleritophoraTemporal range Cambrian OrdovicianScientific classificationDomain EukaryotaKingdom AnimaliaPhylum incertae sedisClass CoeloscleritophoraGroups includedHalkieriids ChancelloridsTheir skeletons may be homologous to those of the molluscs 2 and Halkieria looks very much like a polyplacophoran The shells of this group and the molluscs appear to have originated in the same fashion 2 However there are several reasons to doubt this relationship 3 many of which may not pass muster 4 There are two groups within the coeloscleritophorans the Sachitids to which Halkieria and Wiwaxia belong and the Chancellorids The Ediacaran fossil Ausia has been touted as an ancestral intermediate between both of these groups 5 These are common constituents of Lower Cambrian small shelly fossil assemblages References edit Porter S M 2008 Skeletal Microstructure Indicates Chancelloriids and Halkieriids Are Closely Related Palaeontology 51 4 865 879 doi 10 1111 j 1475 4983 2008 00792 x a b Bengtson S 1992 The cap shaped Cambrian fossil Maikhanella and the relationship between coeloscleritophorans and molluscs Lethaia 25 4 401 420 doi 10 1111 j 1502 3931 1992 tb01644 x Yochelson E L 1993 Molluscan affinity of coeloscleritophorans Lethaia 26 1 47 48 doi 10 1111 j 1502 3931 1993 tb01509 x Bengtson S 1993 Molluscan affinity of coeloscleritophorans reply Lethaia 26 1 48 doi 10 1111 j 1502 3931 1993 tb01510 x Dzik Jerzy August 2009 Possible Ediacaran Ancestry of the Halkieriids PDF In Smith Martin R O Brien Lorna J Caron Jean Bernard eds Abstract Volume International Conference on the Cambrian Explosion Walcott 2009 Toronto Ontario Canada The Burgess Shale Consortium published 31 July 2009 ISBN 978 0 9812885 1 2 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 Coeloscleritophoran amp oldid 1074384177, wikipedia, wiki, book, books, library,
