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IRMNG taxon detailsAspidella Billings, 1872 †
marine,
fossil only
Amer. J. Sci., (3) 3
page(s): 224 [details]
Taxonomic remark Listed as a pseudofossil in Häntzschel, 1975, however since reinterpreted. The Ediacaran genera Ediacaria, Cyclomedusa,...
Taxonomic remark Listed as a pseudofossil in Häntzschel, 1975, however since reinterpreted. The Ediacaran genera Ediacaria, Cyclomedusa, and Spriggia may be junior synonyms of Aspidella, for additional information refer Mapstone & McIlroy, 2006, alternatively they may all be maintainable as separate form-genera. From Gehling et al., 2000: "Aspidella has been reinterpreted perhaps more than any other Precambrian taxon, and has variously been regarded as a fossil mollusc or 'medusoid', a gas escape structure, a concretion, or a mechanical suction mark ... Aspidella includes a wide variety of preservational morphs varying from negative hyporeliefs with a raised rim and ridges radiating from a slit (Aspidella-type preservation), to flat discs with a central boss and sharp outer ring (Spriggia preservation), to positive hyporeliefs with concentric ornamentation (Ediacaria preservation)". From Redhead et al., 2016: "Classified in various extant kingdoms as an alga, animal, bacterium, fungus or in an extinct Kingdom, Vendobionta." Because Aspidella has been classified as an alga or fungus (botanical nomenclature) by some authors, Redhead et al. consider that the later name Aspidella E.-J. Gilbert in Bresadola, 1940 in Fungi is preoccupied, and replace the latter with the new name Saproamanita S.A. Redhead, A. Vizzini, D.C. Drehmel & M. Contu, 2016. Retallack & Broz, 2020 state: Synonymy of virtually all Ediacaran discoid fossils with Aspidella terranovica by Gehling et al. (2000) not only made them unrecognisable but also introduced confusion by interpreting them all as holdfasts of frond-like fossils (MacGabhann 2007) ... Aspidella is not a holdfast, because specimens oriented by collection in place have axes tapering down into the rock rather than up and out of the bed, and most lack axes, but have remnants of quilting in a central area (Retallack 2016a) ... The family Aspidellidae is thus proposed to include Aspidella and Hallidaya as a segregate of segmented and resistant fossils, removed from the majority of Ediacaran discoid fossils, such as Beltanelliformis and Cyclomedusa, which are nonresistant, convex hyporeliefs. [details]
IRMNG (2024). Aspidella Billings, 1872 †. Accessed at: https://irmng.org/aphia.php?p=taxdetails&id=1345116 on 2024-05-23
Date action by
original description
Amer. J. Sci., (3) 3
page(s): 224 [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] additional source Gehling, J. G.; Narbonne, G. M.; Anderson, M. M. (2000). The first named Ediacaran body fossil, Aspidella terranovica. <em>Palaeontology.</em> 43(3): 427-456., available online at https://doi.org/10.1111/j.0031-0239.2000.00134.x [details] verified source for family Retallack, G. J.; Broz, A. P. (2020). <i>Arumberia</i> and other Ediacaran–Cambrian fossils of central Australia. <em>Historical Biology.</em> 33(10): 1964-1988., available online at https://doi.org/10.1080/08912963.2020.1755281 [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 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] habitat flag source as per family [details] From other sources
Descriptive info Fossil according to SN2000 [details]Taxonomic remark Listed as a pseudofossil in Häntzschel, 1975, however since reinterpreted. The Ediacaran genera Ediacaria, Cyclomedusa, and Spriggia may be junior synonyms of Aspidella, for additional information refer Mapstone & McIlroy, 2006, alternatively they may all be maintainable as separate form-genera. From Gehling et al., 2000: "Aspidella has been reinterpreted perhaps more than any other Precambrian taxon, and has variously been regarded as a fossil mollusc or 'medusoid', a gas escape structure, a concretion, or a mechanical suction mark ... Aspidella includes a wide variety of preservational morphs varying from negative hyporeliefs with a raised rim and ridges radiating from a slit (Aspidella-type preservation), to flat discs with a central boss and sharp outer ring (Spriggia preservation), to positive hyporeliefs with concentric ornamentation (Ediacaria preservation)". From Redhead et al., 2016: "Classified in various extant kingdoms as an alga, animal, bacterium, fungus or in an extinct Kingdom, Vendobionta." Because Aspidella has been classified as an alga or fungus (botanical nomenclature) by some authors, Redhead et al. consider that the later name Aspidella E.-J. Gilbert in Bresadola, 1940 in Fungi is preoccupied, and replace the latter with the new name Saproamanita S.A. Redhead, A. Vizzini, D.C. Drehmel & M. Contu, 2016. Retallack & Broz, 2020 state: Synonymy of virtually all Ediacaran discoid fossils with Aspidella terranovica by Gehling et al. (2000) not only made them unrecognisable but also introduced confusion by interpreting them all as holdfasts of frond-like fossils (MacGabhann 2007) ... Aspidella is not a holdfast, because specimens oriented by collection in place have axes tapering down into the rock rather than up and out of the bed, and most lack axes, but have remnants of quilting in a central area (Retallack 2016a) ... The family Aspidellidae is thus proposed to include Aspidella and Hallidaya as a segregate of segmented and resistant fossils, removed from the majority of Ediacaran discoid fossils, such as Beltanelliformis and Cyclomedusa, which are nonresistant, convex hyporeliefs. [details] |
