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Size matters – Analysis of shell repair scars in endocerid cephalopods
Open accessAbstract
Nearly one third of all conchs of Anthoceras buchi (Lesnikowa, 1949) from Baltoscandia display healed apertural breakages. Often multiple of these repair scars can be found in single conchs. Most of the scars are less than 2 mm deep, but deeper slit-like repaired breakages occasionally occur. Small injuries are usually around the entire apertural circumference, but the larger scars are concentrated at the ventral side of the conch, which is interpreted as result of a protection from a hood. The adult diameter of Anthoceras buchi is > 40 mm. Conch regions that exceed 30 mm in diameter rarely contain evidence of multiple repair scars. The relative frequency of deep healed breakages is highest at regions with diameters of 25–30 mm. This pattern is interpreted as evidence for a size limitation of the predator: large specimens with conch diameters above 30 mm had a considerably lower risk to get injured and the preserved injuries were less severe. This potentially explains the strong evolutionary trend of size increase in endocerids during the Lower to Middle Ordovician as escalation between them and shell breaking predators. Additionally, a specimen of Anthoceras buchi is described and figured, which displays colour marks with a mottled pattern. doi:10.1002/mmng.201100001
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Large paired injuries in Ordovician nautiloids might have been caused by shell-breaking predators including nautiloids and eurypterids.
“Large paired injuries in Ordovician nautiloids might have been caused by shell-breaking predators including nautiloids and eurypterids (Kröger 2005), although the culprits are hard to pin down (Kröger 2005, 2011).”
From Palaeozoic evolution of animal mouthparts (2017) · cites this paper as Kröger 2011
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The Mesozoic marine revolution: evidence from snails, predators and grazers
Vermeij, G. J. (1977) · Paleobiology · doi:10.1017/s0094837300005352 · Cited by 1,043
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Palaeozoic evolution of animal mouthparts
Klug, C., Frey, L., Pohle, A., De Baets, K., & Korn, D. (2017) · Bulletin of Geosciences · doi:10.3140/bull.geosci.1648 · Cited by 54
Metadata
- Authors
- Kröger, B.
- Affiliations
- Museum für Naturkunde (DE)
- Corresponding author
- Kröger, B.
- ORCID
- Kröger, B.
- Venue
- Fossil Record
- Publisher
- Pensoft Publishers
- Published
- 2011-08-01
- Volume
- 14
- Issue
- 2
- Pages
- 109-118
- ISSN
- 1860-1014 (ISSN-L)
- 2193-0074
- OpenAlex
- W2136698155
- Cited by
- 24
- References
- 1
- Citations by year
- 2026: 1 · 2025: 2 · 2022: 3 · 2021: 7 · 2019: 1 · 2018: 2 · 2017: 2 · 2015: 1 · 2014: 2 · 2013: 2 · 2012: 1
- FWCI
- 0.89
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- cc-by
- Locations
- Fossil record (publishedVersion, cc-by)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- Informationszentrum Lebenswissenschaften (ZB MED) (submittedVersion, cc-by)
- Funders
- Alexander von Humboldt-Stiftung
- 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
- Ordovician cephalopods, Baltoscandia
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