Conodont affinity and chordate phylogeny - PubMed (original) (raw)
Review
Conodont affinity and chordate phylogeny
P C Donoghue et al. Biol Rev Camb Philos Soc. 2000 May.
Abstract
Current information on the conodonts Clydagnathus windsorensis (Globensky) and Promissum pulchrum Kovács-Endrödy, together with the latest interpretations of conodont hard tissues, are reviewed and it is concluded that sufficient evidence exists to justify interpretation of the conodonts on a chordate model. A new phylogenetic analysis is undertaken, consisting of 17 chordate taxa and 103 morphological, physiological and biochemical characters; conodonts are included as a primary taxon. Various experiments with character coding, taxon deletion and the use of constraint trees are carried out. We conclude that conodonts are cladistically more derived than either hagfishes or lampreys because they possess a mineralised dermal skeleton and that they are the most plesiomorphic member of the total group Gnathostomata. We discuss the evolution of the nervous and sensory systems and the skeleton in the context of our optimal phylogenetic tree. There appears to be no simple evolution of free to canal-enclosed neuromasts; organised neuromasts within canals appear to have arisen at least three times from free neuromasts or neuromasts arranged within grooves. The mineralised vertebrate skeleton first appeared as odontodes of dentine or dentine plus enamel in the paraconodont/euconodont feeding apparatus. Bone appeared later, co-ordinate with the development of a dermal skeleton, and it appears to have been primitively acellular. Atubular dentine is more primitive than tubular dentine. However, the subsequent distribution of the different types of dentine (e.g. mesodentine, orthodentine), suggests that these tissue types are homoplastic. The topology of relationships and known stratigraphic ranges of taxa in our phylogeny predict the existence of myxinoids and petromyzontids in the Cambrian.
Similar articles
- Histology of the heterostracan dermal skeleton: Insight into the origin of the vertebrate mineralised skeleton.
Keating JN, Marquart CL, Donoghue PC. Keating JN, et al. J Morphol. 2015 Jun;276(6):657-80. doi: 10.1002/jmor.20370. Epub 2015 Mar 30. J Morphol. 2015. PMID: 25829358 Free PMC article. - Fossil sister group of craniates: predicted and found.
Mallatt J, Chen JY. Mallatt J, et al. J Morphol. 2003 Oct;258(1):1-31. doi: 10.1002/jmor.10081. J Morphol. 2003. PMID: 12905532 - The origin of conodonts and of vertebrate mineralized skeletons.
Murdock DJ, Dong XP, Repetski JE, Marone F, Stampanoni M, Donoghue PC. Murdock DJ, et al. Nature. 2013 Oct 24;502(7472):546-9. doi: 10.1038/nature12645. Epub 2013 Oct 16. Nature. 2013. PMID: 24132236 - Development and evolutionary origins of vertebrate skeletogenic and odontogenic tissues.
Smith MM, Hall BK. Smith MM, et al. Biol Rev Camb Philos Soc. 1990 Aug;65(3):277-373. doi: 10.1111/j.1469-185x.1990.tb01427.x. Biol Rev Camb Philos Soc. 1990. PMID: 2205303 Review. - The brains of lampreys and hagfishes: characteristics, characters, and comparisons.
Wicht H. Wicht H. Brain Behav Evol. 1996;48(5):248-61. doi: 10.1159/000113204. Brain Behav Evol. 1996. PMID: 8932866 Review.
Cited by
- Colonization of the ocean floor by jawless vertebrates across three mass extinctions.
Brownstein CD, Near TJ. Brownstein CD, et al. BMC Ecol Evol. 2024 Jun 13;24(1):79. doi: 10.1186/s12862-024-02253-y. BMC Ecol Evol. 2024. PMID: 38867201 Free PMC article. - The three-dimensionally articulated oral apparatus of a Devonian heterostracan sheds light on feeding in Palaeozoic jawless fishes.
Dearden RP, Jones AS, Giles S, Lanzetti A, Grohganz M, Johanson Z, Lautenschlager S, Randle E, Donoghue PCJ, Sansom IJ. Dearden RP, et al. Proc Biol Sci. 2024 Mar 27;291(2019):20232258. doi: 10.1098/rspb.2023.2258. Epub 2024 Mar 27. Proc Biol Sci. 2024. PMID: 38531402 Free PMC article. - The oldest three-dimensionally preserved vertebrate neurocranium.
Dearden RP, Lanzetti A, Giles S, Johanson Z, Jones AS, Lautenschlager S, Randle E, Sansom IJ. Dearden RP, et al. Nature. 2023 Sep;621(7980):782-787. doi: 10.1038/s41586-023-06538-y. Epub 2023 Sep 20. Nature. 2023. PMID: 37730987 Free PMC article. - Postcranial disparity of galeaspids and the evolution of swimming speeds in stem-gnathostomes.
Gai Z, Lin X, Shan X, Ferrón HG, Donoghue PCJ. Gai Z, et al. Natl Sci Rev. 2023 Feb 27;10(7):nwad050. doi: 10.1093/nsr/nwad050. eCollection 2023 Jul. Natl Sci Rev. 2023. PMID: 37266551 Free PMC article. - Multivariate mapping of ontogeny, taphonomy and phylogeny to reconstruct problematic fossil taxa.
Reeves JC, Sansom RS. Reeves JC, et al. Proc Biol Sci. 2023 May 31;290(1999):20230333. doi: 10.1098/rspb.2023.0333. Epub 2023 May 31. Proc Biol Sci. 2023. PMID: 37253426 Free PMC article.
Publication types
MeSH terms
LinkOut - more resources
Full Text Sources