ArticlePloS one2018
Tooth mineralization and histology patterns in extinct and extant snaggletooth sharks, Hemipristis (Carcharhiniformes, Hemigaleidae)-Evolutionary significance or ecological adaptation?
Article in PloS one, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.
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16 citing papers in PubMed, 41 citations in OpenAlex.
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- Diversity of tooth mineralisation patterns at the base of crown chondrichthyans.Communications biology · 2025Article
- Reconstruction of feeding behaviour and diet in Devonian ctenacanth chondrichthyans using dental microwear texture and finite element analyses.Royal Society open science · 2025Article
- Eocene Shark Teeth From Peninsular Antarctica: Windows to Habitat Use and Paleoceanography.Paleoceanography and paleoclimatology · 2024Article
- Unraveling the structure, chemical composition, and conserved signaling in leech teeth.Animal cells and systems · 2024Article
- Head anatomy of a lantern shark wet-collection specimen (Chondrichthyes: Etmopteridae).Journal of anatomy · 2023Article
- Systematics and Phylogenetic Interrelationships of the Enigmatic Late Jurassic SharkDiversity · 2023Article
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- Ontogenetic changes in the tooth morphology of bull sharks (Carcharhinus leucas).Journal of fish biology · 2022Article
- Heterodonty and ontogenetic shift dynamics in the dentition of the tiger shark Galeocerdo cuvier (Chondrichthyes, Galeocerdidae).Journal of anatomy · 2022Article
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- Skeletal remains of the oldest known pseudocoracid sharkCretaceous research · 2021Article
- Dental morphology and microstructure of the Prickly Dogfish Oxynotus bruniensis (Squaliformes: Oxynotidae).Journal of anatomy · 2020Article
- Evolutionary trajectories of tooth histology patterns in modern sharks (Chondrichthyes, Elasmobranchii).Journal of anatomy · 2020Article
- Micro-computed tomography imaging reveals the development of a unique tooth mineralization pattern in mackerel sharks (Chondrichthyes; Lamniformes) in deep time.Scientific reports · 2019Article
- Lungfish-like antero-labial tooth addition and amphibian-like enameloid-enamel transition in the coronoid of a Devonian stem actinopterygian.Journal of anatomyArticle
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Authors and funding
5 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Shark jaws exhibit teeth that are arranged into distinct series and files and display great diversities in shapes and structures, which not only is related to their function (grasping, cutting, crushing) during feeding, but also bear a strong phylogenetic signal. So far, most research on the relationship between shark teeth and feeding ecology and systematics focused on the external tooth morphology only. Although the tooth histology of sharks has been examined since the early 19th century, its functional and systematic implications are still ambiguous. Shark teeth normally consist of either a porous, cellular dentine, osteodentine (in lamniform sharks and some batoids) or a dense layer of orthodentine (known from different sharks). Sharks of the order Carcharhiniformes, comprising ca. 60% of all extant shark species, are known to have orthodont teeth, with a single exception-the snaggletooth shark, Hemipristis elongata. High resolution micro-CT images of jaws and teeth from selected carcharhiniform sharks (including extant and fossil snaggletooth sharks) and tooth sections of teeth of Hemipristis, other carcharhiniform and lamniform sharks, have revealed that (1) Hemipristis is indeed the only carcharhiniform shark filling its pulp cavity with osteodentine in addition to orthodentine, (2) the tooth histology of Hemipristis elongata differs from the osteodont histotype, which evolved in lamniform sharks and conversely represents a modified orthodonty, and (3) this modified orthodonty was already present in extinct Hemipristis species but the mineralization sequence has changed over time. Our results clearly show the presence of a third tooth histotype-the pseudoosteodont histotype, which is present in Hemipristis. The unique tooth histology of lamniform sharks might provide a phylogenetic signal for this group, but more research is necessary to understand the phylogenetic importance of tooth histology in sharks in general.
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