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A NEW PHYLOGENETIC ANALYSIS AND CHARACTER MATRIX REASSESSMENT FOR THE COELACANTHS (SARCOPTERYGII: COELACANTHIFORMES)

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dc.contributor.authorFrance, Ethan
dc.contributor.chairBemis, Williamen_US
dc.contributor.committeeMemberAllmon, Warrenen_US
dc.contributor.committeeMemberDillman, Caseyen_US
dc.date.accessioned2024-04-05T18:46:33Z
dc.date.issued2023-08
dc.description3524 pagesen_US
dc.description.abstractCoelacanths are a lineage of sarcopterygian fishes dating at least to the Early Devonian. They are the extant outgroup to (lungfishes + tetrapods) and are represented by two modern species in the genus Latimeria. Known from fossil material since 1822, coelacanths captured international attention upon the 1938 discovery of a living specimen. Most of their diversity, however, is prehistoric. Numerous phylogenetic analyses have evaluated the interrelationships of living and fossil coelacanths. Nearly all such studies are based on a character matrix established by Peter L. Forey in 1998. This matrix has seen limited re-evaluation since it was published, beyond the addition of new taxa and occasionally new characters. Some of Forey’s characters have never been examined in detail. This work is a close reassessment of the coelacanth character matrix, including a discussion of every previously used character and every accepted taxon. Many characters are redefined, combined, deleted, reestablished, or added. All prior character scorings are re-examined and annotated, with various errors corrected and points of ambiguity identified. Scorings are also provided for all genera not included in prior matrices. The result is the most comprehensive character matrix ever assembled for coelacanths and a new phylogenetic tree. This compendium aims to organize current knowledge of fossil coelacanths, direct renewed attention at the characters used to study them, and highlight areas needing further research.en_US
dc.description.embargo2025-09-05
dc.identifier.doihttps://doi.org/10.7298/6hc4-n043
dc.identifier.otherFrance_cornellgrad_0058F_13820
dc.identifier.otherhttp://dissertations.umi.com/cornellgrad:13820
dc.identifier.urihttps://hdl.handle.net/1813/114623
dc.language.isoen
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International*
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/*
dc.subjectCharacter Matrixen_US
dc.subjectCoelacanthen_US
dc.subjectPhylogeneticsen_US
dc.titleA NEW PHYLOGENETIC ANALYSIS AND CHARACTER MATRIX REASSESSMENT FOR THE COELACANTHS (SARCOPTERYGII: COELACANTHIFORMES)en_US
dc.typedissertation or thesisen_US
dcterms.licensehttps://hdl.handle.net/1813/59810.2
thesis.degree.disciplineEcology and Evolutionary Biology
thesis.degree.grantorCornell University
thesis.degree.levelDoctor of Philosophy
thesis.degree.namePh. D., Ecology and Evolutionary Biology

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