Artykuł w czasopiśmie
Brak miniatury
Licencja
ClosedAccessDostęp zamknięty
 

The early elasmobranch Phoebodus: phylogenetic relationships, ecomorphology and a new time-scale for shark evolution

Uproszczony widok
dc.abstract.enAnatomical knowledge of early chondrichthyans and estimates of their phylogeny are improving, but many taxa are still known only from microremains. The nearly cosmopolitan and regionally abundant Devonian genus Phoebodus has long been known solely from isolated teeth and fin spines. Here, we report the first skeletal remains of Phoebodus from the Famennian (Late Devonian) of the Maïder region of Morocco, revealing an anguilliform body, specialized braincase, hyoid arch, elongate jaws and rostrum, complementing its characteristic dentition and ctenacanth fin spines preceding both dorsal fins. Several of these features corroborate a likely close relationship with the Carboniferous species Thrinacodus gracia, and phylogenetic analysis places both taxa securely as members of the elasmobranch stem lineage. Identified as such, phoebodont teeth provide a plausible marker for range extension of the elasmobranchs into the Middle Devonian, thus providing a new minimum date for the origin of the chondrichthyan crown-group. Among pre-Carboniferous jawed vertebrates, the anguilliform body shape of Phoebodus is unprecedented, and its specialized anatomy is, in several respects, most easily compared with the modern frilled shark Chlamydoselachus. These results add greatly to the morphological, and by implication ecological, disparity of the earliest elasmobranchs.
dc.affiliationUniwersytet Warszawski
dc.contributor.authorCoates, Michael
dc.contributor.authorFrey, Linda
dc.contributor.authorHairapetian, Vachik
dc.contributor.authorKlug, Christian
dc.contributor.authorRücklin, Martin
dc.contributor.authorGinter, Michał
dc.contributor.authorJerjen, Iwan
dc.date.accessioned2024-01-26T10:10:50Z
dc.date.available2024-01-26T10:10:50Z
dc.date.issued2019
dc.description.financeNie dotyczy
dc.description.number1912
dc.description.volume286
dc.identifier.doi10.1098/RSPB.2019.1336
dc.identifier.issn0962-8452
dc.identifier.urihttps://repozytorium.uw.edu.pl//handle/item/122141
dc.identifier.weblinkhttps://royalsocietypublishing.org/doi/pdf/10.1098/rspb.2019.1336
dc.languageeng
dc.pbn.affiliationearth and related environmental sciences
dc.relation.ispartofProceedings of the Royal Society B: Biological Sciences
dc.relation.pages20191336
dc.rightsClosedAccess
dc.sciencecloudnosend
dc.titleThe early elasmobranch Phoebodus: phylogenetic relationships, ecomorphology and a new time-scale for shark evolution
dc.typeJournalArticle
dspace.entity.typePublication