Endocranial Morphology and Phylogeny of Palaeozoic Gnathostomes (Jawed Vertebrates)

↓ Direkt till sidans innehåll
↓ Direkt till sidans sekundära innehåll (sidomenyn)

Sökning: onr:"swepub:oai:DiVA.org:uu-9360" > Endocranial Morphol...

1 av 1
Föregående post
Nästa post
Till träfflistan

Brazeau, Martin D.,1981-Uppsala universitet,Evolutionär organismbiologi (författare)

Endocranial Morphology and Phylogeny of Palaeozoic Gnathostomes (Jawed Vertebrates)

BokEngelska2008

Förlag, utgivningsår, omfång ...

Uppsala :Acta Universitatis Upsaliensis,2008
50 s.
electronicrdacarrier

Nummerbeteckningar

LIBRIS-ID:oai:DiVA.org:uu-9360
ISBN:9789155473303
https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-9360URI

Kompletterande språkuppgifter

Språk:engelska
Sammanfattning på:engelska

Ingår i deldatabas

SwePubSwePub

Klassifikation

Ämneskategori:vet swepub-contenttype
Ämneskategori:dok swepub-publicationtype

Serie

Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology,1651-6214 ;570

Anmärkningar

Gnathostomes, or jawed vertebrates, make up the overwhelming majority of modern vertebrate diversity. Among living vertebrates, they comprise the chondrichthyans (“cartilaginous fishes” such as sharks, skates, rays, chimaeras) and the osteichthyans (“bony fishes” or bony vertebrates, inclusive of tetrapods). Gnathostomes appear to have originated in the early Palaeozoic Era, but their early fossil record is fairly scant. The best fossils appear first in the Late Silurian and Devonian periods. Much of gnathostome diversity owes to unique adaptations in the internal skeleton of their head (the endocranium). The endocranium is composed of the braincase, jaws, hyoid arch, and branchial arches, which sometimes fossilise when they are composed of bone or calcified cartilage. The purpose of this thesis is to describe and compare the fossilised cranial endoskeletons of a variety of different Palaeozoic gnathostomes. The objective is to test current conceptions of gnathostome interrelationships (i.e. phylogeny) and infer aspects of key morphological transformations that took place during the evolution of Palaeozoic members of this group. Two key areas are examined: the morphology and interrelationships of Palaeozoic gnathostomes and the morphology of the visceral arches in sarcopterygian fishes. New data on the visceral arches are described from the stem tetrapods Panderichthys and rhizodontids. These provide insight into the sequence of character acquisition leading to the tetrapod middle ear. Panderichthys shows key features of the tetrapod middle ear chamber were established prior to the origin fo digited limbs. New morphological data are described from the “acanthodian” fish Ptomacanthus. Ptomacanthus provides only the second example of a well-preserved braincase from any member of this group. It shows dramatic differences from that of its counterpart, Acanthodes, providing new evidence for acanthodian paraphyly. New interpretations of basal gnathostome and osteichthyan phylogeny are presented, challenging or enriching existing views of these problems.

Ämnesord och genrebeteckningar

NATURVETENSKAP Biologi Mikrobiologi hsv//swe
NATURAL SCIENCES Biological Sciences Microbiology hsv//eng
systematics
palaeontology
anatomy
evolution
Organism biology
Organismbiologi

Biuppslag (personer, institutioner, konferenser, titlar ...)

Ahlberg, Per,Prof.Uppsala universitet,Evolutionär organismbiologi (preses)
Budd, Graham,Dr.Uppsala universitet,Paleontologigruppen (preses)
Blom, Henning,Dr.Uppsala universitet,Evolutionär organismbiologi (preses)
Coates, Michael,Prof.University of Chicago (opponent)
Uppsala universitetEvolutionär organismbiologi (creator_code:org_t)

Internetlänk

Hitta via bibliotek

Endocranial Morphology and Phylogeny of Palaeozoic Gnathostomes (Jawed Vertebrat... (Sök publikationen i LIBRIS)

Till lärosätets databas

1 av 1
Föregående post
Nästa post
Till träfflistan

Hitta mer i SwePub

Av författaren/redakt...: Brazeau, Martin ...; Ahlberg, Per, Pr ...; Budd, Graham, Dr ...; Blom, Henning, D ...; Coates, Michael, ...

Om ämnet

NATURVETENSKAP: NATURVETENSKAP; och Biologi; och Mikrobiologi

Delar i serien: Digital Comprehe ...

Av lärosätet: Uppsala universitet

Sök utanför SwePub

Sök vidare i:: Google; Google Book Search; Google Scholar

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

LIBRIS.kb.se