The Bothriolepis (Placodermi, Antiarcha) material from the Valentia Slate Formation of the Iveragh Peninsula (middle Givetian, Ireland): Morphology, evolutionary and systematic considerations, phylogenetic and palaeogeographic implications

Dupret, VincentUppsala universitet,Evolution och utvecklingsbiologi (författare)

The Bothriolepis (Placodermi, Antiarcha) material from the Valentia Slate Formation of the Iveragh Peninsula (middle Givetian, Ireland) : Morphology, evolutionary and systematic considerations, phylogenetic and palaeogeographic implications

Material of the antiarch placoderm Bothriolepis from the middle Givetian of the Valentia Slate Formation in Iveragh Peninsula, Ireland, is described and attributed to a new species, B. dairbhrensis sp. nov. A revision of the genus Bothriolepis is proposed, and its taxonomic content and previous phylogenetic analyses are reviewed, as well as the validity of morphologic characteristics considered important for the establishment of the genus, such as the shape of the preorbital recess of the neurocranium. A series of computerised phylogenetic analyses was performed, which reveals that our new species is the sister taxon to the Frasnian Scottish form B. gigantea. New phylogenetic and biogeographic analyses of the genus Bothriolepis together with comparisons between faunal assemblages reveal a first northward dispersal wave from Gondwana to Euramerica at the latest in the mid Givetian. Other Euramerican species of Bothriolepis seem to belong to later dispersal waves from Gondwana, non-excluding southward waves from Euramerica. Questions remain open such as the taxonomic validity and stratigraphic constraints for the most ancient forms of Bothriolepis in China, and around the highly speciose nature of the genus.

Byrne, HannahUppsala universitet,Evolution och utvecklingsbiologi(Swepub:uu)hanby707 (författare)
Castro, Nelia A.Univ Oslo, Nat Hist Museum, Oslo, Norway. (författare)
Hammer, ØyvindUniv Oslo, Nat Hist Museum, Oslo, Norway. (författare)
Higgs, Kenneth T.Univ Coll Cork, Sch Biol Earth & Environm Sci, Cork, Ireland. (författare)
Long, Johan A.Flinders Univ S Australia, Coll Sci & Engn, Adelaide, SA, Australia. (författare)
Niedzwiedzki, Grzegorz,1980-Uppsala universitet,Evolution och utvecklingsbiologi(Swepub:uu)grzni333 (författare)
Qvarnström, MartinUppsala universitet,Evolution och utvecklingsbiologi(Swepub:uu)marqv125 (författare)
Stössel, IwanSwiss Fed Inst Technol, Dept Earth Sci, Zurich, Switzerland. (författare)
Ahlberg, Per,1963-Uppsala universitet,Evolution och utvecklingsbiologi(Swepub:uu)peahl255 (författare)
Uppsala universitetEvolution och utvecklingsbiologi (creator_code:org_t)

Av författaren/redakt...: Dupret, Vincent; Byrne, Hannah; Castro, Nelia A.; Hammer, Øyvind; Higgs, Kenneth T ...; Long, Johan A.; visa fler...; Niedzwiedzki, Gr ...; Qvarnström, Mart ...; Stössel, Iwan; Ahlberg, Per, 19 ...; visa färre...

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