...Francisco Jose Poyato-Ariza; Sylvie Wenz Abstract Stenamara mia is a new genus and species of a rare pycnodontiform fish from the Barremian, early Cretaceous, lacustrine beds of Las Hoyas, province of Cuenca, Spain. It was previously considered Eomesodon sp., but a number of characters clearly...

... assessment of whether early apomorphy-defined teleosts are as morphologically conservative as typically assumed; and (3) compare diversification in crown and stem teleosts. The systematic affinities of dapediiforms and pycnodontiforms, two extinct neopterygian clades of uncertain phylogenetic placement...

... multicuspid crown with nine cusps, well adapted for benthic macroalgal scraping. This morph, assigned to a new species of Pycnodus ( P. multicuspidatus sp. nov.), emphasizes the phenotypic plasticity of the group and documents an additional trophic specialization among Palaeogene pycnodontiform fishes...

... orbit diameter over time became apparent. The Teleostei are the principal drivers of this change. The Eocene appears to mark a dramatic increase in two previously rare feeding modes in fishes: nocturnal feeding and high-precision benthic feeding. Interestingly, members of the Pycnodontiformes had...

...Fig. 10. Fishes from the Kimmeridgian–Tithonian lithographic limestone of the Causse Méjean. (a) Pycnodontiform, Gyrodus hexagonus , complete specimen, Nivoliers, Préhistorama Museum collection. (b) Pycnodontiform, Thiollierepycnodus wagneri , nearly complete specimen; Drigas, APHPL_DRI1. (c, d...

...Fig. 15. Relative abundances of the Ksar Metlili taxa, based on the 2010 sampled material, considering all the elements or only teeth for actinopterygians and crocodylomorphs. Others = Vertebrata indet., Chondrichthyes, Pycnodontiformes, Osteoglossiformes, ?Siluriformes or Polypteriformes...

... invertebrates. Vertebrate records are extremely scarce. The only known publication signals a pycnodontiform vomer dentition ( Bocchino, 1977 ; Cione and Pereira, 1986 ). In order to analyze the sedimentary facies association and to infer the dynamic processes and depositional environment of the strata...

... conditions in a groundwater-dominated, relatively small, hydrologically open lake within the wetland. The low strontium isotopic ratios (mean 87 Sr/ 86 Sr c. 0.07) determined in the rock and the pycnodontiform and coelacanth bones indicate that these fish lived in a freshwater environment without marine...

... in the gills, trunk, and stomach of the majority of specimens of all groups of fishes found in Tlayúa, including pycnodontiforms, ichthyodectiforms, ionoscopiforms, pachyrhizodontoids, aspidorhynchiforms, macrosemids, and clupeomorphs. About 40%, 60%, and 70% of ∼300 fish specimens prepared thus far preserve...

... of the latter group, although not exclusively, may also have been scavengers ( Schweigert 2015 ). Within vertebrates nearly all groups, such as fishes (Chondrichthyes, sharks, rays and chimaeras), Actinopterygii, such as Holostei (e.g. Lepisosteiformes or Amiiformes), Teleostei, Pycnodontiformes, reptiles...