[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

New in _Palaeontology_ (including a European ceratopsian)

Johan Lindgren, Philip J. Currie, Mikael Siverson, Jan Rees, Peter Cederström, and Filip Lindgren (2007). The first neoceratopsian dinosaur remains from Europe. Palaeontology 50: 929?937.

Abstract: "Shallow marine, nearshore strata of earliest Campanian (_Gonioteuthis granulataquadrata_ belemnite Zone) and latest Early Campanian (informal _Belemnellocamax mammillatus_ belemnite zone) age in the Kristianstad Basin, southern Sweden, have yielded isolated leptoceratopsid teeth and vertebrae, representing the first record of horned dinosaurs from Europe. The new leptoceratopsid occurrence may support a European dispersal route for the Leptoceratopsidae, or may represent an entirely endemic population. The presence of leptoceratopsid teeth in shallow marine deposits contradicts previous hypotheses suggesting that basal neoceratopsians mainly preferred arid and/or semi-arid habitats far from coastal areas."

The material comprises three maxillary teeth, one dentary tooth and two caudal vertebrae from one locality (Asen), and one maxillary tooth and one dentary tooth from another locality (Ullstorp). The Swedish neoceratopsian is classified as "Leptoceratopsidae gen. et sp. indet." due to the fragmentary nature of the material. However, the authors make it clear that the dental characters are unique and would justify the erection of a new taxon, but they held off "pending the discovery of more complete material". So stay tuned, I suppose. AFAIK, only one non-avian dinosaur (="Real Dinosaur" sensu M. Taylor) has ever been named from Scandinavia (_Dromaeosauroides bornholmensis_).

There's also a few non-dinosaurian papers...

Christopher A. Brochu (2007). Systematics and taxonomy of Eocene tomistomine crocodylians from Britain and Northern Europe. Palaeontology 50 (4), 917?928.

Abstract: "The holotype of _Dollosuchus dixoni_ (Owen) from the Early?Middle Eocene Bracklesham Beds of England is a set of mandibular fragments that cannot be distinguished from corresponding parts of other longirostrine crocodylians. An isolated humerus from the Bracklesham Beds is consistent with a gavialoid, but it cannot be referred to the holotype of _D. dixoni_. The name _Dollosuchoides densmorei_ is established for the well-preserved skull and skeleton of a tomistomine from the Middle Eocene of Belgium that had been referred to _D. dixoni_. It can be clearly distinguished from the basal tomistomine _?Crocodilus? spenceri_ Buckland from the Lower Eocene of England, which cannot be referred to _Dollosuchoides_ and is provisionally referred to _Kentisuchus_ Mook. Although basal within Tomistominae, _Dollosuchoides_ is more closely related to _Tomistoma_ than to _Kentisuchus_.

Mikael Siverson, Johan Lindgren, and L. Scott Kelley (2007). Anacoracid sharks from the Albian (Lower Cretaceous) Pawpaw Shale of Texas. Palaeontology 50: 939?950.

Abstract: "Recent collecting from the Pawpaw Shale in north-east Texas has yielded several hundred teeth of anacoracid sharks. The material allows for a much-needed revision of the Late Albian anacoracids from North America. The previously recognized _Squalicorax_ sp., also referred to as _S. volgensis_ in more recent publications, is a mix of two different species: _S. priscoserratus_ sp. nov. and _S. pawpawensis_ sp. nov. In addition to these two new species, a single tooth is assigned to _S. aff. S. baharijensis_. Our data indicate that anacoracids were a considerably more diverse group in the North American Cretaceous than previously thought. We attribute much of the underestimation of diversity to vague species concepts, poor preparation techniques and the associated lack of attention to certain dental features, in particular neck morphology, root surface porosity and the root's vascularization."

The new anacoracid material comes from the same formation that yielded a nodosaur (_Pawpawsaurus campbelli_) and pterosaur (_Coloborhynchus wadleighi_), among other vertebrate remains.



Local listings, incredible imagery, and driving directions - all in one place! http://maps.live.com/?wip=69&FORM=MGAC01