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New References



There were some new references at the library today.
 
Gayet, Marshall, Sempere, Meunier, Cappetta and Rage, 2001. Middle Maastrichtian vertebrates (fishes, amphibians, dinosaurs and other reptiles, mammals) from Pajcha Pata (Bolivia). Biostratigraphic, palaeoecologic and palaeobiogeographic implications. Palaeogeography, Palaeoclimatology, Palaeoecology. 169 39-68.
 
Describes lots of new stuff from the Lower Member of the El Molino Formation (middle Maastrichtian) of Bolivia, including some dinosaurian fragments.
Theropoda indet.
Material- (MHNC 3702) tooth (10 mm)
(MHNC coll.) tooth fragments
Description- A fairly typical theropod tooth (recurved, serrated, flattened) with 3-5 serrations per mm anteriorly and 4-5 per mm posteriorly.
Comments- The authors refer this to Coelurosauria indet., although this is probably simply based on size.  As small non-coelurosaurian theropods are known from South America (such as noasaurids), I prefer to refer it to Theropoda indet.
Sauropoda indet.
Material- (MHNC coll.) partial teeth, tooth fragments
Comments- If only these were described or figured, I could probably say what type of sauropod they are from.  I'm betting titanosaurs, but there's no way to be sure with the information given.
 
Chure, 2000. Utah's first Allosaurus- Marsh's "Megalosaurus" specimen rediscovered. Brgham Young University Geology Studies. 45 1-4.
 
Describes YPM 55898, a partial tooth found by Marsh in 1870 and referred to Megalosaurus.  Examination indicates it's probably from Allosaurus.
 
Foster and Chure, 2000. An ilium of a juvenile Stokesosaurus (Dinosauria, Theropoda) from the Morrison Formation (Upper Jurassic: Kimmeridgian), Meade County, South Dakota. Brgham Young University Geology Studies. 45 5-10.
 
Describes a new partial ilium of Stokesosaurus, missing the preacetabular blade.  It has an estimated length of 120 mm and differs from the holotype in that the vertical ridge is less massive, more vertically oriented and flares dorsally and ventrally.  The ilium is unfortunately now lost.  There are several differences from Iliosuchus, suggesting generic separation, although the width of the vertical ridge in both Stokesosaurus and Iliosuchus suggests they may be closely related (the ridges in Piatnitzkysaurus, Megalosaurus and tyrannosaurids are narrower).  Interestingly, Iliosuchus has large lateral foramina like Piatnitzkysaurus, although these are likely to be for blood vessels, not air sacs (contra Bonaparte 1986).
 
Maxwell and Cifelli, 2000. Last evidence of sauropod dinosaurs (Saurischia: Sauropodomorpha) in the North American Mid-Cretaceous. Brgham Young University Geology Studies. 45 pg??.
 
Describes several brachiosaurid teeth (OMNH coll.) from the Mussentuchit Member of the Cedar Mountain Formation (Albian-Cenomanian) of Utah.
 
Mickey Mortimer