Salterella
| Salterella Temporal range:
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|---|---|
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| S. pulchella[2] | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | †Agmata (?) |
| Family: | †Salterellidae |
| Genus: | †Salterella Billings, 1861[1] |
| Type species | |
| †Salterella rugosa (= Serpulites maccullochi Murchison, 1859) Billings, 1861
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| Species | |
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Salterella is an enigmatic Cambrian genus with a calcareous shell that appears to be septate,[3] but is rather filled with stratified laminar deposits.[4] Its shell contains grains of sediment, which are obtained selectively (with a preference for denser grains) by a manner also observed in foramanifera.[5]
The genus is known from several locations, such as Newfoundland and Labrador and Quebec in Canada,[6][7] the Scottish Highlands[8] and Argentina.[9]
Volborthella was formerly placed in synonymy with Salterella by Ellis L. Yochelson in 1983[8]; however, Volborthella was later accepted as a separate genus again by Yochelson & Kisselev in 2003.[10] Both genera are currently placed in the Salterellidae family in the phylum Agmata.
Species
Two or three species of Salterella are known:
- †Salterella conulata Clark, 1924[6]
- †Salterella maccullochi (Murchison, 1859) (Synonyms: S. mexicana Lochman, 1952; S. expansa Poulsen, 1927; S. rugosa Billings, 1861, Serpulites maccullochi Murchison, 1859)[8][9]
- †Salterella pulchella Billings, 1861[1] (poorly known?)
Former species
- †S. obtusa Billings, 1861:[1] This Middle Cambrian species was moved to the genus Hyolithes d'Eichwald, 1840, and renamed Hyolithes billingsi Walcott, 1886.[2] It was later moved again to Linevitus Syssoiev, 1958.
- †S. billingsi Safford, 1869: A Middle Ordovician species of Salterella from the Murfreesboro Limestone formation in Tennessee described by James M. Safford in 1869. However, T. H. Clark considered it distinct from other Salterella fossils, creating the genus Polylopia Clark, 1925 to encompass it.[11]
See also
References
- ^ a b c Billings, E.H. (1861). "On some new or little known species of lower Silurian fossils from the Potsdam Group (Primordial zone)". Palaeozoic Fossils. 1 (1): 1–18.
- ^ a b Charles Doolittle Walcott (1886). Second contribution to the studies on the Cambrian faunas of North America. Vol. 30 of Geological Survey bulletin. Govt. Print. Off. pp. 1–369.
- ^ Lipps, J. H.; Sylvester, A. G. (1 March 1968). "The Enigmatic Cambrian Fossil Volborthella and Its Occurrence in California". Journal of Paleontology. 42 (2): 329–336. ISSN 0022-3360. JSTOR 1302218.
- ^ Yochelson, E. L.; Flower, R. H.; Webers, G. F. (1973), "The bearing of the new Late Cambrian monoplacophoran genus Knightoconus upon the origin of the Cephalopoda", Lethaia, 6 (3): 275–309, doi:10.1111/j.1502-3931.1973.tb01199.x
- ^ Peel, John S. (2016). "Anatase and Hadimopanella selection by Salterella from the Kap Troedsson formation (Cambrian Series 2) of North Greenland". GFF. 139 (1): 70–74. doi:10.1080/11035897.2016.1227365.
- ^ a b Yochelson, Ellis L. (1970). "On The Early Cambrian Fossil Salterella conulata Clark in Eastern North America" (PDF). United States Geological Survey Professional Paper. 683-B: 1–10.
- ^ Skovsted, Christian B. (2003). "Unusually preserved Salterella from the Lower Cambrian Forteau Formation of Newfoundland". GFF. 125 (1): 17–22. doi:10.1080/11035890301251017.
- ^ a b c Yochelson, E.L. (1983). "Salterella (Early Cambrian: Agmata) from the Scottish Highlands" (PDF). Palaeontology. 26: 253–260.
- ^ a b Astini, Ricardo A.; Thomas, William A.; Yochelson, Ellis L. (2004). "Salterella in the Argentine Precordillera: an Early Cambrian palaeobiogeographic indicator of Laurentian affinity". Palaeogeography, Palaeoclimatology, Palaeoecology. 213 (1–2): 125–132. doi:10.1016/j.palaeo.2004.07.008.
- ^ Yochelson, Ellis L.; Kisselev, Gennadii N. (2003). "Early Cambrian Salterella and Volborthella (Phylum Agmata) re‐evaluated". Lethaia. 36 (1): 8–20. doi:10.1080/00241160310001254.
- ^ Yochelson, Ellis L. (1968). "On the nature of Polylopia" (PDF). United States Geological Survey Professional Paper. 593-F: 1–7.
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