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Luiz
Felipe Reis wrote-
> I was wondering if anyone has any kind of
information on the family
> dicraeosaurinae.Documents and skeletals would
be VERY usefull.
Here's my meager data on dicraeosaurids (usually
identified as a family in recent papers). Remember that Rebbachisaurus is
now considered to be in a different more primitive family )Rebbachisauridae,
with Nigersaurus, Histriasaurus and perhaps Losillasaurus),
while Nemegtosaurus and Quaesitosaurus are titanosaurs.
Dicraeosaurids are universally agreed to be the sister group of
diplodocids.
Dicraeosauridae Huene 1956
= Dicraeosaurinae Janensch 1929 Amargasaurus Salgado and Bonaparte 1991
A. cazaui Salgado and Bonaparte 1991 = "Amargasaurus groeberi" Bonaparte 1984 Hauterivian, Early Cretaceous La Amarga Formation, Argentina Holotype- (MACN-N 15) (3.8 tons) Reffered- dorsal vertebra, dorsal ribs, chevrons (Bonaparte 1996) (very large) sacrum (Bonaparte 1996) Reference- Salgado, L. and J.F. Bonaparte. 1991. Un nuevo sauropodo Dicraeosauridae, Amargasaurus cazaui gen. et sp. nov., de la Formacion La Amarga, neocomiano de la Provincia del Neque'n, Argentina. Ameghiniana, 28:333-346. Dicraeosaurus Janensch 1914
D. hansemanni Janensch 1914 Kimmeridgian, Late Jurassic Tendaguru Formation, Tanzania Holotype- (HMN m) Reffered- (HMN dd) partial skull D. sattleri Janensch 1914 Kimmeridgian, Late Jurassic Tendaguru Formation, Tanzania Comments- Salgado (1999) suggests that
Dicraeosaurus sattleri may be a species of Amargasaurus, but does not formally
name Amargasaurus sattleri.
Reference- Salgado, L. 1999. The macroevolution of
the Diplodocimorpha (Dinosauria; Sauropoda): a developmental model.
_Ameghiniana_ 36: 203-216.
undescribed Dicraeosaurid (Russell, Russell and
Sweet 1994)
Late Maastrichtian, Late Cretaceous Pingling Formation, China Comments- Russell et al. describe the magnetostratigraphy of the the Cretaceous-Tertiary transition sediments in Nanxiong Basin. The Pingling Formation is confidently dated (on magnetic and radiometric data) as from the late Maastrichtian, so the rare dinosaur fossils in it (incl. small theropods, tyrannosaurids, therizinosaurids, dicraeosaurids, small ornithopods, and hadrosaurs) are the youngest known dinosaurian skeletal remains in Asia. Reference- Russell, D.A., D.E. Russell, and A.R.
Sweet. 1993. The end of the dinosaurian era in the Nanxiong Basin. VPA 31(2):
139-145.
Mickey Mortimer
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