THE LOWER CAMBRIAN FOSSIL TOMMOTIA
Abstract
The genera Tommotia Missarẑevskij 1970 (1966) and Camenella Missarẑevskij 1966 from the Lower Cambrian Tommotian Stage of the Siberian Platform represent different skeletal parts of the same organism and are consequently synonymous. Tommotia is selected as the valid name. Tommotia baltica n.sp. is described from the Lower Cambrian zone of Mobergella holsti of the Kalmarsund area in the southern part of the Baltic Sea. The Lower Cambrian families Tommotiidae Missarzevskij 1970 (1969) and Tannuolinidae Fonin & Smirnova 1967 show important similarities in their basic structure and are brought together in the new order Mitrosagophora, characterized by a composite outer skeleton with two types of skeletal elements, termed ‘mitral’ and ‘sellate’, each occurring in symmetrical pairs. The group is of uncertain systematic position but may have affinities with the Machaeridia. The Scandinavian zone of Mobergella holsti is correlated with the Siberian zone of Dokidocyathus lenaicus and Majatheca tumefacta, the uppermost zone of the Tommotian Stage.
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These fossils have been interpreted as sclerites of larger scleritomes of problematic animals.
“These fossils have been interpreted as sclerites of larger scleritomes of problematic animals”
From Chronology of early Cambrian biomineralization (2012) · cites this paper as Bengtson, 1970
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Chronology of early Cambrian biomineralization
KOUCHINSKY, A., BENGTSON, S., RUNNEGAR, B., SKOVSTED, C., STEINER, M., & VENDRASCO, M. (2012) · Geological Magazine · doi:10.1017/s0016756811000720 · Cited by 224 · see citing works
Self-citationThe oldest ‘onychophoran’ <i>Xenusion:</i> a link connecting phyla?
Dzik, J., & Krumbiegel, G. (1989) · Lethaia · doi:10.1111/j.1502-3931.1989.tb01679.x · Cited by 137 · see citing works
The Lower Cambrian Fossil Record of the Soviet Union
Rozanov, A. Y., & Zhuravlev, A. Y. (1992) · Topics in Geobiology · doi:10.1007/978-1-4899-2427-8_7 · Cited by 121 · see citing works
A new lower Cambrian shelly fossil biostratigraphy for South Australia
Betts, M. J., Paterson, J. R., Jago, J. B., Jacquet, S. M., Skovsted, C. B., Topper, T. P., & Brock, G. A. (2016) · Gondwana Research · doi:10.1016/j.gr.2016.05.005 · Cited by 104 · see citing works
“5 2009), with separate zonations based on archaeocyaths (Walter, 1967; Gravestock 1984; 95 Zhuravlev and Gravestock, 1994), trilobites (Jell in Bengtson et al., 1990) and acritarchs 96 (Zang et al., 2007). In the absence of a local stage subdivision specifically for the Australian 97 lower Cambrian, previous workers s…”
BackgroundInfluentialBengtson, S. (2004) · The Paleontological Society Papers · doi:10.1017/s1089332600002345 · Cited by 65 · see citing works
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- Authors
- Bengtson, S.
- Affiliations
- Uppsala University (SE)
- Corresponding author
- Bengtson, Stefan
- ORCID
- Bengtson, Stefan
- Venue
- Lethaia
- Publisher
- Scandinavian University Press
- Published
- 1970-10
- Volume
- 3
- Issue
- 4
- Pages
- 363-392
- ISSN
- 0024-1164 (ISSN-L)
- 1502-3931
- OpenAlex
- W2075969208
- Cited by
- 86
- References
- 0
- Citations by year
- 2026: 1 · 2023: 3 · 2022: 1 · 2021: 3 · 2020: 1 · 2016: 1 · 2015: 2 · 2014: 4 · 2013: 4 · 2012: 1
- FWCI
- 0.98
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Lethaia (publishedVersion)
- Topics
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Evolutionary Biology
- Physical Sciences › Earth and Planetary Sciences › Paleontology › Evolution and Paleontology Studies
- Keywords
- Lower Cambrian, Cambrian biostratigraphy, taxonomic synonymy, new species, Baltic Sea, Siberian Platform
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