Agaleus is an extinct genus of stem-galeomorph shark from the Early Jurassic Epoch. The genus Agaleus is monotypic, consisting solely of the species Agaleus dorsetensis. This species is currently only known from isolated teeth. It is the oldest known unambiguous crown group shark.[1]
| Agaleus dorsetensis Temporal range:
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|---|---|
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Family: | †Agaleidae |
| Genus: | †Agaleus Duffin & Ward, 1983 |
| Species: | †A. dorsetensis
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| Binomial name | |
| †Agaleus dorsetensis Duffin & Ward, 1983
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Taxonomy
editSome authorities have placed this species as a basal member of the order Orectolobiformes, but subsequent researchers have found it to be a stem-galeomorph just outside the crown group of Orectolobiformes.[2]
Distribution
editIt is known from the Hettangian-Sinemurian of Lyme Regis, England and the Pliensbachian-aged Hasle Formation of Denmark and Grimmen clay pit of north-eastern Germany.[3] Other places which have produced this species include Northern Ireland, France, Belgium, and Sweden. Possible later occurrences of this genus in north-western Europe have been documented but not yet formally attributed to the genus.
References
edit- ^ Marjanović, D. (2021). "The Making of Calibration Sausage Exemplified by Recalibrating the Transcriptomic Timetree of Jawed Vertebrates". Frontiers in Genetics. 12. 521693. doi:10.3389/fgene.2021.521693. PMC 8149952. PMID 34054911.
- ^ Rees, Jan; Cuny, Gilles (Mar 2007). "On the enigmatic neoselachianAgaleus dorsetensisfrom the European Early Jurassic". GFF. 129 (1): 1–6. Bibcode:2007GFF...129....1R. doi:10.1080/11035890701291001. ISSN 1103-5897. S2CID 128875354.
- ^ Stumpf, Sebastian; Kriwet, Jürgen (2019-12-01). "A new Pliensbachian elasmobranch (Vertebrata, Chondrichthyes) assemblage from Europe, and its contribution to the understanding of late Early Jurassic elasmobranch diversity and distributional patterns". PalZ. 93 (4): 637–658. Bibcode:2019PalZ...93..637S. doi:10.1007/s12542-019-00451-4. ISSN 1867-6812. S2CID 181782998.
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