The cranial endocast of Dipnorhynchus sussmilchi (Sarcopterygii: Dipnoi) and the interrelationships of stem-group lungfishes

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dc.contributor.author Clement, Alice M
dc.contributor.author Challands, T J
dc.contributor.author Long, John A
dc.contributor.author Ahlberg, Per E
dc.date.accessioned 2016-11-30T00:58:01Z
dc.date.available 2016-11-30T00:58:01Z
dc.date.issued 2016-10-20
dc.description Distributed under Creative Commons CC-BY 4.0 en
dc.description.abstract The first virtual cranial endocast of a lungfish from the Early Devonian, Dipnorhynchus sussmilchi, is described. Dipnorhynchus, only the fourth Devonian lungfish for which a near complete cranial endocast is known, is a key taxon for clarifying primitive character states within the group. A ventrally-expanded telencephalic cavity is present in the endocast of Dipnorhynchus demonstrating that this is the primitive state for "true'' Dipnoi. Dipnorhynchus also possesses a utricular recess differentiated from the sacculolagenar pouch like that seen in stratigraphically younger lungfish (Dipterus, Chirodipterus, Rhinodipterus), but absent from the dipnomorph Youngolepis. We do not find separate pineal and para-pineal canals in contrast to a reconstruction from previous authors. We conduct the first phylogenetic analysis of Dipnoi based purely on endocast characters, which supports a basal placement of Dipnorhynchus within the dipnoan stem group, in agreement with recent analyses. Our analysis demonstrates the value of endocast characters for inferring phylogenetic relationships. en
dc.identifier.citation Clement et al. (2016), The cranial endocast of Dipnorhynchus sussmilchi (Sarcopterygii: Dipnoi) and the interrelationships of stem-group lungfishes. PeerJ 4:e2539; DOI 10.7717/peerj.2539 en
dc.identifier.doi https://doi.org/10.7717/peerj.2539 en
dc.identifier.issn 2167-8359
dc.identifier.uri http://hdl.handle.net/2328/36787
dc.language.iso en
dc.publisher PeerJ en
dc.relation http://purl.org/au-research/grants/ARC/DP160102460 en
dc.relation.grantnumber ARC/DP160102460
dc.rights Copyright 2016 Clement et al. Distributed under Creative Commons CC-BY 4.0 en
dc.rights.holder The authors en
dc.rights.license CC-BY
dc.subject Evolutionary Studies en
dc.subject Neuroscience, en
dc.subject Paleontology, en
dc.subject Zoology en
dc.subject Dipnoi, en
dc.subject Endocast, en
dc.subject Braincase, en
dc.subject Palaeoneurology, en
dc.subject Devonian en
dc.subject Dipnorhynchus en
dc.subject Phylogeny en
dc.subject Microtomography en
dc.subject Cladistic analysis en
dc.title The cranial endocast of Dipnorhynchus sussmilchi (Sarcopterygii: Dipnoi) and the interrelationships of stem-group lungfishes en
dc.type Article en
local.contributor.authorOrcidLookup Long, John A: https://orcid.org/0000-0001-8012-0114 en_US
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