Body-shape diversity in Triassic–Early Cretaceous neopterygian fishes: sustained holostean disparity and predominantly gradual increases in teleost phenotypic variety

  title={Body-shape diversity in Triassic–Early Cretaceous neopterygian fishes: sustained holostean disparity and predominantly gradual increases in teleost phenotypic variety},
  author={John T. Clarke and Matt Friedman},
  pages={402 - 433}
Abstract. Comprising Holostei and Teleostei, the ∼ 32,000 species of neopterygian fishes are anatomically disparate and represent the dominant group of aquatic vertebrates today. However, the pattern by which teleosts rose to represent almost all of this diversity, while their holostean sister-group dwindled to eight extant species and two broad morphologies, is poorly constrained. A geometric morphometric approach was taken to generate a morphospace from more than 400 fossil taxa, representing… Expand
Osteology and phylogeny of Robustichthys luopingensis, the largest holostean fish in the Middle Triassic
This study provides a redescription and revision of Robustichthys based upon a comparative study of eight type specimens and nine new specimens, and revised topology provides new insights into the evolution and historical paleoecology of halecomorph fishes. Expand
The oldest species of Peltoperleidus (Louwoichthyiformes, Neopterygii) from the Middle Triassic (Anisian) of China, with phylogenetic and biogeographic implications
  • Guang-Hui Xu
  • Medicine
  • PeerJ
  • 2021
Results of a cladistic analysis unite four species of Peltoperleidus as a monophyletic group within the Louwoichthyiformes, and suggest that the presence of two horizontal rows of notably deepened scales was independently evolved in Pelt opercleidus and another stem-neopterygian taxon Altisolepis. Expand
A new stem-neopterygian fish from the Middle Triassic (Anisian) of Yunnan, China, with a reassessment of the relationships of early neopterygian clades
  • Guanghui Xu
  • Biology
  • Zoological Journal of the Linnean Society
  • 2020
A new small-sized stem-neopterygian with extraordinarily long teeth, Louwoichthys pusillus gen. et sp. Expand
The paleoichthyofauna housed in the Colección Nacional de Paleontología of Universidad Nacional Autónoma de México
Fishes are a paraphyletic group composed by craniates except for the four-limbed clade Tetrapoda. This group was the only vertebrate representative until the Devonian but now comprises almost half ofExpand
Marine Early Triassic Actinopterygii from the Candelaria Hills (Esmeralda County, Nevada, USA)
Abstract A new locality for low-latitudinal, Early Triassic fishes was discovered in the Candelaria Hills, southwestern Nevada (USA). The fossils are derived from the lower Candelaria Formation,Expand
Feroxichthys yunnanensis gen. et sp. nov. (Colobodontidae, Neopterygii), a large durophagous predator from the Middle Triassic (Anisian) Luoping Biota, eastern Yunnan, China
The skull of the new taxon is exceptionally well-preserved, showing some peculiar features rarely known in other stem neopterygians, for example fusion of paired premaxillae, fusion of lacrimal with maxilla, and a fused parieto-dermopterotic with a strong posterior process. Expand
Fossilized cell structures identify an ancient origin for the teleost whole-genome duplication
This work infer patterns of genome size evolution in fossil stem-group teleosts using high-resolution synchrotron X-ray tomography to measure the bone cell volumes, which correlate with genome size in living species, and indicates that WGD occurred very early on the teleost stem lineage and that all extinct stem-groups known so far possessed duplicated genomes. Expand
Does exceptional preservation distort our view of disparity in the fossil record?
It is shown here that lagerstätten impact the disparity of ichthyosaurs, Mesozoic marine reptiles, by preserving higher diversity and more complete specimens, and suggests that uneven sampling presents issues for the view of disparity in the fossil record, but that this is also dependent on the methodology used. Expand
Feroxichthys panzhouensis sp. nov., a hump-backed colobodontid (Neopterygii, Actinopterygii) from the early Middle Triassic of Panzhou, Guizhou, China
Results of a cladistic analysis recover the new species as a sister taxon of F. yunnanensis within the Colobodontidae, and suggest that a hump-backed body form has independently evolved multiple times in Triassic neopterygians. Expand


Explosive morphological diversification of spiny-finned teleost fishes in the aftermath of the end-Cretaceous extinction
  • M. Friedman
  • Biology, Medicine
  • Proceedings of the Royal Society B: Biological Sciences
  • 2010
The trajectory of morphological diversification in this major radiation from its first appearance in the Late Cretaceous to the Miocene is reconstructed using a geometric morphometric database comprising more than 600 extinct species known from complete body fossils to suggest that multiple factors contributed to the prolific anatomical radiation of acanthomorphs. Expand
Permian–Triassic Osteichthyes (bony fishes): diversity dynamics and body size evolution
Patterns in Permian–Triassic bony fishes, a group whose evolutionary dynamics are understudied, are reviewed and a general trend from low osteichthyan diversity in thePermian to higher levels in the Triassic is suggested. Expand
Little evidence for enhanced phenotypic evolution in early teleosts relative to their living fossil sister group
Quantifying evolutionary rate and capacity for innovation in size and shape for the first 160 million y (Permian–Early Cretaceous) of evolution in neopterygian fishes finds that early teleosts do not show enhanced phenotypic evolution relative to holosteans, belying the living fossil reputation of their extant representatives. Expand
Ecomorphological diversifications of Mesozoic marine reptiles: the roles of ecological opportunity and extinction
Metrics of ecomorphology, including functional disparity in the jaws and dentition and skull-size diversity, show that the Middle to early Late Triassic represented a time of pronounced phenotypic diversification in marine reptile evolution. Expand
Ecomorphological selectivity among marine teleost fishes during the end-Cretaceous extinction
  • M. Friedman
  • Biology, Medicine
  • Proceedings of the National Academy of Sciences
  • 2009
Ecomorphological selectivity among marine teleost fishes during the end-Cretaceous extinction is demonstrated, based on a genus-level dataset that accounts for lineages predicted on the basis of phylogeny but not yet sampled in the fossil record. Expand
‘Fish’ (Actinopterygii and Elasmobranchii) diversification patterns through deep time
  • G. Guinot, L. Cavin
  • Biology, Medicine
  • Biological reviews of the Cambridge Philosophical Society
  • 2016
Results indicate a better fossil record quality for elasmobranchs due to their microfossil‐like fossil distribution and their very low diversity in freshwater systems, whereas freshwater actinopterygians are diverse in this realm with lower preservation potential. Expand
Bony labyrinth morphology in early neopterygian fishes (Actinopterygii: Neopterygii)
Examination of endocasts of the bony labyrinth and associated structures for a sample of Mesozoic neopterygian fishes points to the substantial potential of this anatomical system for addressing the longstanding questions in the relationships of fossil ray‐finned fishes to one another and living groups. Expand
A new stem-neopterygian fish from the Middle Triassic of China shows the earliest over-water gliding strategy of the vertebrates
The discovery of exceptionally well-preserved fossils of a new thoracopterid flying fish from the Middle Triassic of China represents the earliest evidence of an over-water gliding strategy in vertebrates and supports the hypothesis that the re-establishment of marine ecosystems after end-Permian mass extinction is more rapid than previously thought. Expand
Feeding ecology of the deep‐bodied fish Dapedium (Actinopterygii, Neopterygii) from the Sinemurian of Dorset, England
The analysis of the functional morphology of Dapedium, in combination with its jaw anatomy and dentition, indicates that the genus was well adapted to a durophagous feeding habit, although indirect evidence suggests a more generalist feeding mode. Expand
The first record of Late Jurassic crossognathiform fishes from Europe and their phylogenetic importance for teleostean phylogeny
The Late Jurassic Bavarichthys incognitus from Ettling, Bavaria is described, which represents the oldest record of a crossognathiform in Europe and together with Chongichthy from the Oxfordian of South America stands at the basal levels of a clade includingcrossognathids and pachyrhizodontoids. Expand