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The oldest articulated osteichthyan reveals mosaic gnathostome characters
TLDR
The discovery of an exceptionally preserved primitive fish from the Ludlow of Yunnan, China, that represents the oldest near-complete gnathostome (jawed vertebrate) offers insights into the origin and early divergence of osteichthyans, and indicates that the minimum date for the actinopterygian–sarcoperygian split was no later than 419 million years ago. Expand
A Silurian placoderm with osteichthyan-like marginal jaw bones
TLDR
A three-dimensionally preserved 419-million-year-old placoderm fish from the Silurian of China is described that represents the first stem gnathostome with dermal marginal jaw bones (premaxilla, maxilla and dentary), features previously restricted to Osteichthyes. Expand
The earliest known stem-tetrapod from the Lower Devonian of China.
TLDR
The enlargement of the cerebral hemispheres and the possible presence of the pars tuberalis in this stem-tetrapod indicate that some important brain modifications related to terrestrial life had occurred at the beginning of the tetrapod evolution, much earlier than previously thought. Expand
Bayesian Morphological Clock Methods Resurrect Placoderm Monophyly and Reveal Rapid Early Evolution in Jawed Vertebrates.
TLDR
Analysis of this morphological data set reveals that paraphyly and monophyly of core placoderms (excluding maxillate forms) are essentially equally parsimonious, and that gnathostomes underwent a rapid burst of evolution during the Silurian period which declined during the Early Devonian. Expand
A Silurian maxillate placoderm illuminates jaw evolution
TLDR
A second Silurian maxillate placoderm is described that more securely bridges the jawless toothlike plates of placoderms to the development of the jawed condition that ultimately led to the three-boned jaw in ancestors of modern vertebrates. Expand
Cranial morphology of the Silurian sarcopterygian Guiyu oneiros (Gnathostomata: Osteichthyes)
TLDR
The skull roof bone pattern in the Guiyu clade that comprises Psarolepis and Achoania is restored, for the first time, and the large attachment area of the basicranial muscle indicates the presence of a well-developed intracranial joint in GuiyU. Expand
A Devonian predatory fish provides insights into the early evolution of modern sarcopterygians
TLDR
The new skull material of Qingmenodus, a Pragian onychodont from China, is described using high-resolution computed tomography to image internal structures of the braincase and bridges the morphological gap between stem sarcopterygians and coelacanths and helps to illuminate the early evolution and diversification of crown sarcoperygians. Expand
A new tooth-plated lungfish from the Middle Devonian of Yunnan, China, and its phylogenetic relationships
TLDR
Phylogenetic analysis of Devonian lungfish based on a dataset of 150 characters and 33 taxa indicates that the new taxon is more crownward than Dipterus and the clade comprising Adololopas , Sorbitorhyn chus and Pillararhynchus . Expand
Earliest known coelacanth skull extends the range of anatomically modern coelacanths to the Early Devonian.
TLDR
The earliest known coelacanth skull (Euporosteus yunnanensis sp. nov.) from the Early Devonian (late Pragian) of Yunnan, China is reported, lending support to the possibility that Eoactinistia is also an anatomically modern coelacanths, and provides a more refined reference point for studying the rapid early diversification and subsequent evolutionary conservatism of the coELacanths. Expand
Early Gnathostome Phylogeny Revisited: Multiple Method Consensus
TLDR
The findings consistently corroborate the paraphyly of placoderms, all ‘acanthodians’ as a paraphyletic stem group of chondrichthyans, Entelognathus as a stem gnathostome, and the Guiyu-lineage as stem sarcopterygians. Expand
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