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IRMNG taxon detailsSphaerinvia Vachard, 1981 †
fossil only
Not documented
Taxonomic remark Treated as Charales in original work and in Mamet & Preat, 2010, however as Problematica by other workers (presently...
Taxonomic remark Treated as Charales in original work and in Mamet & Preat, 2010, however as Problematica by other workers (presently followed in IRMNG). E.g. from Jeffery & Stanton, 1996: Sphaerinvia has been considered to be a charophyte and a marine calcareous alga (Mamet 1991). However, its distribution independent of depth on the ramp and its presence in deep, probably aphotic sediments, together with a lack of transported sediments on the Alamogordo Ramp, demonstrate that it is not a land-derived charophyte. This precludes an algal affinity. Additionally, its microstructure is considered too complex to be a sponge (A. Pisera pers. comm. 1994). Possible affinities with the Cnidaria (possibly heterocorals, as suggested by Vachard 1980), worm tubes, or perhaps some kind of reproductive cyst, among others, remain possible. [details]
IRMNG (2023). Sphaerinvia Vachard, 1981 †. Accessed at: https://irmng.org/aphia.php?p=taxdetails&id=11918280 on 2024-11-16
Date action by
basis of record
Mamet, B.; Préat, A. (2010). Un atlas d'algues calcaires. Carbonifère, Alaska arctique.- Carnets de Géologie - Notebooks on Geology, Brest, Livre / Book / Publication Spéciale 2010/01 (CG2010_SP01), 60 pp. [details]
verified source for family Jeffery, D. L.; Stanton, R. J. (1996). Biotic gradients on a homoclinal ramp: the Alamogordo Member of the Lake Valley Formation, Lower Mississippian, New Mexico, USA. <em>Geological Society, London, Special Publications.</em> 107(1): 111-126., available online at https://doi.org/10.1144/gsl.sp.1996.107.01.09 [details] name verified source Mamet, B.; Préat, A. (2010). Un atlas d'algues calcaires. Carbonifère, Alaska arctique.- Carnets de Géologie - Notebooks on Geology, Brest, Livre / Book / Publication Spéciale 2010/01 (CG2010_SP01), 60 pp. [details] current name source Mamet, B.; Préat, A. (2010). Un atlas d'algues calcaires. Carbonifère, Alaska arctique.- Carnets de Géologie - Notebooks on Geology, Brest, Livre / Book / Publication Spéciale 2010/01 (CG2010_SP01), 60 pp. [details] extant flag source Mamet, B.; Préat, A. (2010). Un atlas d'algues calcaires. Carbonifère, Alaska arctique.- Carnets de Géologie - Notebooks on Geology, Brest, Livre / Book / Publication Spéciale 2010/01 (CG2010_SP01), 60 pp. [details] Unreviewed
Taxonomic remark Treated as Charales in original work and in Mamet & Preat, 2010, however as Problematica by other workers (presently followed in IRMNG). E.g. from Jeffery & Stanton, 1996: Sphaerinvia has been considered to be a charophyte and a marine calcareous alga (Mamet 1991). However, its distribution independent of depth on the ramp and its presence in deep, probably aphotic sediments, together with a lack of transported sediments on the Alamogordo Ramp, demonstrate that it is not a land-derived charophyte. This precludes an algal affinity. Additionally, its microstructure is considered too complex to be a sponge (A. Pisera pers. comm. 1994). Possible affinities with the Cnidaria (possibly heterocorals, as suggested by Vachard 1980), worm tubes, or perhaps some kind of reproductive cyst, among others, remain possible. [details]
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