A New Soft-Shelled Trionychid Turtle of the Genus Khunnuchelys from the Upper Cretaceous Bostobe Formation of Kazakhstan

  title={A New Soft-Shelled Trionychid Turtle of the Genus Khunnuchelys from the Upper Cretaceous Bostobe Formation of Kazakhstan},
  author={Igor G. Danilov and Natasha S. Vitek and Alexander O. Averianov and Vadim N. Glinskiy},
Previously unpublished trionychid turtle material from the Upper Cretaceous (Santonian—lower Campanian) Bostobe Formation from the Baybishe and Baykhozha localities in Kazakhstan is described. The material represents a new species of Khunnuchelys, a large, skull-based clade of Cretaceous Asian trionychids. Concordant with other partial skulls and fragmentary specimens described previously, Khunnuchelys lophorhothon sp. nov. has the unusual features of a beaklike maxilla and a vaulted, expanded… 
New Cranial Material of Gilmoremys lancensis (Testudines, Trionychidae) from the Hell Creek Formation of Southeastern Montana, U.S.A.
ABSTRACT Plastomenidae is a speciose clade of soft-shelled turtles (Trionychidae) known from Campanian to Eocene deposits throughout western North America. We here describe two large skulls from
Redescription of the skull of ‘Trionyx’ kyrgyzensis and improved phylogenetic taxon sampling of Cretaceous and Palaeogene soft-shelled turtles (Trionychidae) of Asia, including the oldest crown trionychids
The hypothesis that Petrochelys kyrgyzensis is a crown trionychid and a member of Trionychinae is supported, highlighting the importance of including multiple extinct taxa in phylogenetic analyses prior to using any of those taxa as calibration points in divergence dating estimates.
Frontal bones of non-avian theropod dinosaurs from the Upper Cretaceous (Santonian–?Campanian) Bostobe Formation of the northeastern Aral Sea region, Kazakhstan
Three theropod taxa have been identified based on isolated frontal bones from the Santonian–?Campanian Bostobe Formation at the Shakh-Shakh locality, in the northeastern Aral Sea region of
A Review of the Fossil Record of Old World Turtles of the Clade Pan-Trionychidae
  • G. Georgalis, W. Joyce
  • Geography, Environmental Science
    Bulletin of the Peabody Museum of Natural History
  • 2017
Abstract Turtles of the clade Pan-Trionychidae have a rich fossil record in the Old World, ranging from the Early Cretaceous (Hauterivian) to the Holocene. The clade most probably originated in Asia
The paleoenvironments of azhdarchid pterosaurs localities in the Late Cretaceous of Kazakhstan
It is speculated that pterosaurs may have been attracted to this area by the abundant resources in the bio-productive estuaries and nearshore upwelling waters.
Review of taxonomy, geographic distribution, and paleoenvironments of Azhdarchidae (Pterosauria)
The four proposed autapomorphies of Eurazhdarcho langendorfensis from the lower Maastrichtian Sebeş Formation of Romania are based on misinterpretations of material and this taxon is likely a subjective junior synonym of Hatzegopteryx thambema.


New Material and a Reassessment of Soft-Shelled Turtles (Trionychidae) from the Late Cretaceous of Middle Asia and Kazakhstan
Previously unpublished trionychid turtle material, consisting of numerous shell fragments, from two Late Cretaceous (Santonian—early Campanian) localities from Middle Asia and Kazakhstan are described, providing the first clear evidence for the relationship between Cret Jurassic Asian and North American trionYchids.
We re-examine one previously described trionychid specimen (a posterior part of a carapace formerly attributed to Trionyx zakhidovi Khosatzky, 1966) and describe additional trionychid shell material
Khunnuchelys gen.nov., a new trionychid (Testudines: Trionychidae) from the Late Cretaceous of Inner Mongolia and Uzbekistan
Conchochelys from the Paleocene of North America shares with Khunnuchelys derived features of the palate and braincase, and the two genera may be members of a monophyletic clade of trionychids.
New Material of Gilmoremys lancensis nov. comb. (Testudines: Trionychidae) from the Hell Creek Formation and the Diagnosis of Plastomenid Turtles
A phylogenetic analysis of all well-known plastomenid turtles establishes Gilmoremys lancensis as the most basal known plASTomenid and reveals that cranial characters are more reliable in diagnosing plastomid turtles, in particular the contribution of the parietal to the orbit wall and the extensive secondary palate.
Insights into the Taxonomy and Systematics of North American Eocene Soft-Shelled Turtles from a Well-Preserved Specimen
  • N. Vitek
  • Geography, Environmental Science
  • 2011
A nearly complete fossil soft-shelled turtle from the Eocene Washakie Formation of Wyoming is described and identified as Oliveremys uintaensis, comb.
Cretaceous Trionychids of Asia: An Expanded Review of Their Record and Biogeography
This chapter presents an expanded review of all described and/or figured specimens and taxa of trionychids from the Cretaceous (Barremian to Maastrichtian) of Asia. Cretaceous occurrences in Asia are
Intraspecific variation in the cranial feeding mechanism of turtles of the genus Trionyx (Reptilia, Testudines, Trionychidae).
and time. Variation in the jaws of T. ferox is shown to be co-existent with variation in 1) other skull features which are presumed to be part of the cranial feeding mechanism, 2) the rhamphotheca or
Systematics and taxonomy of soft-shelled turtles (Family Trionychidae) from the Judith River Group (mid-Campanian) of
The taxonomic diversity of Judith River Group trionychids is less than that of younger Maastrichtian and Paleocene assemblages from the Western Interior, largely because of the absence of plastomenine trionYchids in the JudithRiver Group assemblage.