A new genus of lungfish from the Givetian (Middle Devonian) of central Australia
نویسنده
چکیده
A new Dipterus−like lungfish, Harajicadipterus youngi, is described from the Givetian (Middle Devonian) Harajica Sand− stone Member of central Australia. The material is comprised of five specimens representing the skull roof, orbital bones, tooth plates, operculo−gular bones, a partial pectoral girdle, centra and scales. Harajicadipterus can be distinguished from other dipnoans by its long postorbital cheek, broad B bone, lack of contact between E and C bones, and radiating tooth rows with some denticles evident between the rows. Results of a cladistic analysis of 81 characters for 33 dipnoan taxa resolved Harajicadipterus below the holodontid clade but as more derived than Dipterus and the chirodipterid clade.
منابع مشابه
Early evolution of the lungfish pectoral-fin endoskeleton: evidence from the Middle Devonian (Givetian) Pentlandia macroptera
*Correspondence: Zerina Johanson, Department of Earth Sciences, Natural History Museum, Cromwell Road, London SW75BD, UK e-mail: [email protected] As the closest living relatives of tetrapods, lungfishes are frequently used as extant models for exploring the fin-to-limb transition. These studies have generally given little consideration to fossil taxa. This is because even though lungfish fi...
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