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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
The Oldest Actinopterygian Highlights the Cryptic Early History of the Hyperdiverse Ray-Finned Fishes
TLDR
Phylogenetic analysis places Meemannia as an early-diverging ray-finned fish, resolving it as the sister lineage of Cheirolepis plus all younger actinopterygians, and fills a conspicuous faunal gap in the otherwise diverse late Silurian-earliest Devonian vertebrates of the South China Block. Expand
An onychodont fish (Osteichthyes, Sarcopterygii) from the Early Devonian of China, and the evolution of the Onychodontiformes
  • Jing Lu, M. Zhu
  • Biology, Medicine
  • Proceedings of the Royal Society B: Biological…
  • 22 January 2010
Although the superbly preserved specimens of Onychodus jandemarrai have greatly advanced our understanding of the Onychodontiformes, a primitive sarcopterygian group with large parasymphysial toothExpand
A new stem sarcopterygian illuminates patterns of character evolution in early bony fishes
TLDR
A new lobe-finned fish Ptyctolepis brachynotus dating from the Early Devonian is described, which preserves a novel combination of cranial characters and suggests revision of evolutionary relationships among bony fish. 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
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
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
New findings in a 400 million-year-old Devonian placoderm shed light on jaw structure and function in basal gnathostomes
TLDR
Previous assumptions about placoderm jaw structure and function are tested by using high-resolution computed tomography, digital dissection, and enlarged 3D printouts on a unique articulated 400 million-year-old buchanosteid arthrodire, and new evidence indicates unrecognized similarities in jaw structure between Arthrodires and osteichthyans. Expand
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