A fresh look at
3D modelling
Carboniferous
Endocast
Evolution
Megalichthyidae
Phylogenetic analysis
Sarcopterygii
Tetrapodomorph
Tomography
Vertebrate
Journal
PeerJ
ISSN: 2167-8359
Titre abrégé: PeerJ
Pays: United States
ID NLM: 101603425
Informations de publication
Date de publication:
2021
2021
Historique:
received:
28
09
2021
accepted:
14
11
2021
entrez:
30
12
2021
pubmed:
31
12
2021
medline:
31
12
2021
Statut:
epublish
Résumé
The megalichthyids are one of several clades of extinct tetrapodomorph fish that lived throughout the Devonian-Permian periods. They are advanced "osteolepidid-grade" fishes that lived in freshwater swamp and lake environments, with some taxa growing to very large sizes. They bear cosmine-covered bones and a large premaxillary tusk that lies lingually to a row of small teeth. Diagnosis of the family remains controversial with various authors revising it several times in recent works. There are fewer than 10 genera known globally, and only one member definitively identified from Gondwana. Two especially well-preserved 3D fossils of Never before seen morphological details of the palate, hyoid arch, basibranchial skeleton, pectoral girdle and axial skeleton are revealed and described. Several additional features are confirmed or updated from the original description. Moreover, the first full, virtual cranial endocast of any tetrapodomorph fish is presented and described, giving insight into the early neural adaptations in this group. Phylogenetic analysis confirms the monophyly of the Megalichthyidae with seven genera included (
Sections du résumé
BACKGROUND
BACKGROUND
The megalichthyids are one of several clades of extinct tetrapodomorph fish that lived throughout the Devonian-Permian periods. They are advanced "osteolepidid-grade" fishes that lived in freshwater swamp and lake environments, with some taxa growing to very large sizes. They bear cosmine-covered bones and a large premaxillary tusk that lies lingually to a row of small teeth. Diagnosis of the family remains controversial with various authors revising it several times in recent works. There are fewer than 10 genera known globally, and only one member definitively identified from Gondwana.
METHODS
METHODS
Two especially well-preserved 3D fossils of
RESULTS
RESULTS
Never before seen morphological details of the palate, hyoid arch, basibranchial skeleton, pectoral girdle and axial skeleton are revealed and described. Several additional features are confirmed or updated from the original description. Moreover, the first full, virtual cranial endocast of any tetrapodomorph fish is presented and described, giving insight into the early neural adaptations in this group. Phylogenetic analysis confirms the monophyly of the Megalichthyidae with seven genera included (
Identifiants
pubmed: 34966593
doi: 10.7717/peerj.12597
pii: 12597
pmc: PMC8667741
doi:
Types de publication
Journal Article
Langues
eng
Pagination
e12597Informations de copyright
©2021 Clement et al.
Déclaration de conflit d'intérêts
The authors declare there are no competing interests.
Références
PeerJ. 2016 Oct 20;4:e2539
pubmed: 27781157
R Soc Open Sci. 2020 Sep 23;7(9):200933
pubmed: 33047053
Ann Ist Super Sanita. 2012;48(1):75-82
pubmed: 22456020
Nature. 2020 Mar;579(7800):549-554
pubmed: 32214248
PLoS One. 2015 Oct 22;10(10):e0141277
pubmed: 26492190
Nat Commun. 2012;3:1160
pubmed: 23093197
Nature. 2003 Sep 4;425(6953):65-9
pubmed: 12955140
PLoS One. 2012;7(3):e33683
pubmed: 22448265
Nature. 2006 Apr 6;440(7085):757-63
pubmed: 16598249
Nature. 2008 Oct 16;455(7215):925-9
pubmed: 18923515
Nature. 2004 Nov 4;432(7013):94-7
pubmed: 15525987
Nat Ecol Evol. 2021 Oct;5(10):1403-1414
pubmed: 34426679
Nature. 2017 Jun 29;546(7660):642-645
pubmed: 28636600
Nat Commun. 2013;4:2108
pubmed: 23820554
PLoS One. 2014 Nov 26;9(11):e113898
pubmed: 25427173
PeerJ. 2018 Jul 6;6:e5148
pubmed: 30002977
Nat Ecol Evol. 2017 Oct;1(10):1470-1476
pubmed: 29185516
Sci Adv. 2016 Jun 03;2(6):e1600154
pubmed: 27386576