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IRMNG taxon detailsAgmata †
marine,
fossil only
Yochelson, E. L. (1977). Agmata, a proposed extinct phylum of Early Cambrian age. <em>Journal of Paleontology.</em> 51(3): 437-454., available online at https://www.jstor.org/stable/1303675 [details]
Taxonomic remark Phylum level status disputed by Dunkley Jones, 2007 who states: [The] two “problematic” fossils, Volborthella with a...
Taxonomic remark Phylum level status disputed by Dunkley Jones, 2007 who states: [The] two “problematic” fossils, Volborthella with a purely agglutinated test, and Salterella with a part-agglutinated and part-biomineralized carbonate test, were placed together within a novel phylum, the Agmata, on the basis of their unique morphology and similar Early Cambrian age (Yochelson 1977) ... a recent review of these organisms, which continues to argue that they represent a unique grade of metazoan organisation and should be retained in the phylum Agmata (Yochelson and Kisselev 2003) ... On the basis of this and previous studies of Salterella and Volborthella, there is no evidence to suggest that these organisms possessed a grade of organisation sufficiently unique to justify the use of phylum-level classification. As a result, I have placed both genera within the formal category of incertae sedis, that of uncertain taxonomic affinity. [details]
IRMNG (2024). Agmata †. Accessed at: https://www.irmng.org/aphia.php?p=taxdetails&id=102 on 2024-06-04
Date action by
original description
Yochelson, E. L. (1977). Agmata, a proposed extinct phylum of Early Cambrian age. <em>Journal of Paleontology.</em> 51(3): 437-454., available online at https://www.jstor.org/stable/1303675 [details]
basis of record Yochelson, E. L. (1977). Agmata, a proposed extinct phylum of Early Cambrian age. <em>Journal of Paleontology.</em> 51(3): 437-454., available online at https://www.jstor.org/stable/1303675 [details] additional source Dunkley Jones, T. (2007). Salterella and Volborthella from the Early Cambrian of Spitsbergen: the evolution of agglutinating organisms during the Neoproterozoic-Cambrian transition. <em>Micropaleontology.</em> 53(4): 331-342., available online at https://doi.org/10.2113/gsmicropal.53.4.331 note: alternative taxonomic placement (as incertae sedis, = Problematica) [details] taxonomy source Yochelson, E. L. (1977). Agmata, a proposed extinct phylum of Early Cambrian age. <em>Journal of Paleontology.</em> 51(3): 437-454., available online at https://www.jstor.org/stable/1303675 [details] name verified source Yochelson, E. L. (1977). Agmata, a proposed extinct phylum of Early Cambrian age. <em>Journal of Paleontology.</em> 51(3): 437-454., available online at https://www.jstor.org/stable/1303675 [details] current name source Høyberget, M.; Ebbestad, J. O. R.; Funke, B.; Funke, M.-L. K.; Nakrem, H. A. (2023). The Skyberg Lagerstätte from the Mjøsa area, Norway: a rare window into the late early Cambrian biodiversityof Scandinavia. <em>Lethaia.</em> 56(2): 1-28., available online at https://doi.org/10.18261/let.56.2.4 [details] extant flag source Yochelson, E. L. (1977). Agmata, a proposed extinct phylum of Early Cambrian age. <em>Journal of Paleontology.</em> 51(3): 437-454., available online at https://www.jstor.org/stable/1303675 [details] habitat flag source Yochelson, E. L. (1977). Agmata, a proposed extinct phylum of Early Cambrian age. <em>Journal of Paleontology.</em> 51(3): 437-454., available online at https://www.jstor.org/stable/1303675 [details] From other sources
Taxonomic remark Phylum level status disputed by Dunkley Jones, 2007 who states: [The] two “problematic” fossils, Volborthella with a purely agglutinated test, and Salterella with a part-agglutinated and part-biomineralized carbonate test, were placed together within a novel phylum, the Agmata, on the basis of their unique morphology and similar Early Cambrian age (Yochelson 1977) ... a recent review of these organisms, which continues to argue that they represent a unique grade of metazoan organisation and should be retained in the phylum Agmata (Yochelson and Kisselev 2003) ... On the basis of this and previous studies of Salterella and Volborthella, there is no evidence to suggest that these organisms possessed a grade of organisation sufficiently unique to justify the use of phylum-level classification. As a result, I have placed both genera within the formal category of incertae sedis, that of uncertain taxonomic affinity. [details]
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