First record of the ichthyodectiform fish Cladocyclus from eastern Gondwana: an articulated skeleton from the Early Cretaceous of Queensland, Australia

Berrell, Rodney W., Alvarado-Ortega, Jesús, Yabumoto, Yoshitaka and Salisbury, Steven W. (2013) First record of the ichthyodectiform fish Cladocyclus from eastern Gondwana: an articulated skeleton from the Early Cretaceous of Queensland, Australia. Acta Palaeontologica Polonica, 59 4: 903-920. doi:10.4202/app.2012.0019

Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials)
Name Description MIMEType Size Downloads

Author Berrell, Rodney W.
Alvarado-Ortega, Jesús
Yabumoto, Yoshitaka
Salisbury, Steven W.
Title First record of the ichthyodectiform fish Cladocyclus from eastern Gondwana: an articulated skeleton from the Early Cretaceous of Queensland, Australia
Formatted title
First record of the ichthyodectiform fish Cladocyclus from eastern Gondwana: an articulated skeleton from the Early Cretaceous of Queensland, Australia
Journal name Acta Palaeontologica Polonica   Check publisher's open access policy
ISSN 0567-7920
1732-2421
Publication date 2013-06-17
Year available 2013
Sub-type Article (original research)
DOI 10.4202/app.2012.0019
Open Access Status DOI
Volume 59
Issue 4
Start page 903
End page 920
Total pages 18
Place of publication Warsaw, Poland
Publisher Instytut Paleobiologii, Polska Akademia Nauk
Language eng
Abstract Cladocyclus is a genus of ichthyodectiform fish that is best known from fossils found in shallow marine Cretaceous deposits in Brazil and Morocco. Herein, a new species of Cladocyclus is described on the basis of a fossil that comprises an articulated skull and anterior part of the body, preserved as part and counter-part in what was originally a single eroded nodule of fluvially-deposited volcanolithic sandstone from the Lower Cretaceous (upper Albian) portion of the Winton Formation near Isisford, central-western Queensland, Australia. This specimen represents the first record of Cladocyclus in eastern Gondwana, and indicates that species of this fish may also have inhabited freshwater environments. The new species is assigned to the genus Cladocyclus based on the morphology of the cleithrum (the arms are oriented at approximately 90 degrees to each other) and a mandibular articular facet that incorporates portions of the angular, the articular and the retroarticular. Cladocyclus geddesi sp. nov. can be distinguished from other congeners based on the possession of a more elongate horizontal arm of the cleithrum and a supraoccipital crest that is gently convex posteriorly. This discovery greatly expands the geographic range of Cladocyclus, and supports the idea of a distinct southern fish fauna in the seas surrounding the fragmenting Gondwanan landmasses during the mid-Cretaceous.
Formatted abstract
The ichthyodectiform teleost fish Cladocyclus is best known from shallow marine deposits in Brazil and Morocco. A new fossil from the Early Cretaceous (late Albian) portion of the Winton Formation near Isisford, central-western Queensland, Australia, represents the first record of Cladocyclus in eastern Gondwana, and indicates that species of this fish also inhabited freshwater environments. The articulated skull and anterior part of the body are preserved as part and counter-part in what was originally a single eroded nodule of fluvially-deposited volcanolithic sandstone. The specimen is referred to Cladocyclus based on the morphology of the cleithrum (the arms are oriented at approximately 90 degrees to each other) and a mandibular articular facet that incorporates portions of the angular, the articular and the retroarticular. Cladocyclus geddesi sp. nov. can be distinguished from other species of Cladocyclus based on the possession of a more elongate horizontal arm of the cleithrum and a supraoccipital crest that is gently convex posteriorly. This discovery greatly expands the geographic range of Cladocyclus, and supports the idea of a distinct southern fish fauna in the seas surrounding the fragmenting Gondwanan landmasses during the ‘mid’-Cretaceous.
Keyword Teleostei
Cladocyclus
Cretaceous
Winton Formation
Australia
Q-Index Code C1
Q-Index Status Provisional Code
Grant ID LP0347332
PAPIIT-106011
Institutional Status UQ
Additional Notes available online 17 Jun 2013

Document type: Journal Article
Sub-type: Article (original research)
Collections: Non HERDC
School of Biological Sciences Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 5 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 7 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Mon, 02 Jun 2014, 22:33:59 EST by Steven W. Salisbury on behalf of School of Biological Sciences