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IRMNG taxon detailsEmmonsaspis Resser & Howell, 1938 †
marine,
fossil only
Bull. Geol. Soc. Amer., 49
page(s): 233 [details]
Taxonomic remark Originally considered to be a primitive chordate, reassessed as frond-like Burgess Shale fossil (Conway Morris, 1993),...
Taxonomic remark Originally considered to be a primitive chordate, reassessed as frond-like Burgess Shale fossil (Conway Morris, 1993), later as a chordate again (unplaced in Vertebrata), refer Pari et al., 2022. These authors state: Resser and Howell (1938) ... [noted] that the morphology "of this animal argue[s] strongly for its reference to the chordates." ... Conway Morris (1993) initially considered Emmonsaspis cambrensis to be a frond-like form similar to some Ediacaran animals. ... He also noted that the other specimens represent a bivalved arthropod (here described as V. montcalmi n. gen. n. sp.). ... Conway Morris and Caron (2014, Extended Data fig. 6) reinterpreted E. cambrensis from the Parker Formation as a chordate as part of their redescription of the chordate Metaspriggina walcotti Simonetta and Insom, 1993, from the Burgess Shale (Conway Morris, 2008). [details]
IRMNG (2024). Emmonsaspis Resser & Howell, 1938 †. Accessed at: https://www.irmng.org/aphia.php?p=taxdetails&id=1107358 on 2024-09-10
Date action by
original description
Bull. Geol. Soc. Amer., 49
page(s): 233 [details] basis of record Neave, S. A. and successors. (1939-2004). Nomenclator Zoologicus, vols. 1-10 online. [developed by uBio, hosted online at MBLWHOI Library]. , available online at http://ubio.org/NomenclatorZoologicus/ [details] basis of record Brands, S. J. (compiler). (1989-2005). Systema Naturae 2000. Amsterdam, The Netherlands (2006 version). Originally available online at http://sn2000.taxonomy.nl/; for current information, refer http://taxonomicon.taxonomy.nl/ProjectDescription.aspx . [details] verified source for family Pari, G.; Briggs, D. E.; Gaines, R. R. (2022). The soft-bodied biota of the Cambrian Series 2 Parker Quarry Lagerstätte of northwestern Vermont, USA. <em>Journal of Paleontology.</em> 96(4): 770-790., available online at https://doi.org/10.1017/jpa.2021.125 note: authority given as Walcott, 1890, in error [details] name verified source Neave, S. A. and successors. (1939-2004). Nomenclator Zoologicus, vols. 1-10 online. [developed by uBio, hosted online at MBLWHOI Library]. , available online at http://ubio.org/NomenclatorZoologicus/ [details] current name source Brands, S. J. (compiler). (1989-2005). Systema Naturae 2000. Amsterdam, The Netherlands (2006 version). Originally available online at http://sn2000.taxonomy.nl/; for current information, refer http://taxonomicon.taxonomy.nl/ProjectDescription.aspx . [details] extant flag source Sepkoski, J. J., Jr. (2002). A compendium of fossil marine animal genera. <em>Bulletins of American Paleontology.</em> 363, 1-560. [details] habitat flag source Sepkoski, J. J., Jr. (2002). A compendium of fossil marine animal genera. <em>Bulletins of American Paleontology.</em> 363, 1-560. [details] From other sources
Descriptive info Fossil according to SN2000. Marine, fossil: Cambrian (Sepkoski 2002) [details]Taxonomic remark Originally considered to be a primitive chordate, reassessed as frond-like Burgess Shale fossil (Conway Morris, 1993), later as a chordate again (unplaced in Vertebrata), refer Pari et al., 2022. These authors state: Resser and Howell (1938) ... [noted] that the morphology "of this animal argue[s] strongly for its reference to the chordates." ... Conway Morris (1993) initially considered Emmonsaspis cambrensis to be a frond-like form similar to some Ediacaran animals. ... He also noted that the other specimens represent a bivalved arthropod (here described as V. montcalmi n. gen. n. sp.). ... Conway Morris and Caron (2014, Extended Data fig. 6) reinterpreted E. cambrensis from the Parker Formation as a chordate as part of their redescription of the chordate Metaspriggina walcotti Simonetta and Insom, 1993, from the Burgess Shale (Conway Morris, 2008). [details] |
