[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]
Re: BRAZILIAN NEWS
Darren Naish sent in the following. Due to technical difficulties in
reaching people across the pond, listproc had recently unsubscribed
him, though, so it didn't recognize him when it got the enclosed
message. I've added you back, Darren. Happy New Year!
------- Start of forwarded message -------
Date: Tue, 4 Jan 2000 18:17:29 GMT0BST
Subject: BRAZILIAN NEWS
CC: email@example.com, Tetanurae@aol.com, firstname.lastname@example.org,
Happy new year everyone, and thank the good lord for fireworks and
aspirin. Some time before the xmas period I got hold of another
conference volume, this time a Brazilian one. It includes new
dinosaur genera as well as lots of new stuff on Triassic
archosauriforms. The volume appears to be part of a journal series.
The journal is called _Paleontologia em Destaque_, subtitled _Boletim
Informativo da Sociedade Brasileira de Paleontologia_; this is Ano.
14. n. 26 (Abril, Maio, Junho/1999). All texts are presented as
abstracts, and here are my summaries of the ones of interest.
Kischlat, E.-E. and Barbarena, M. C.: _Prestosuchus chiniquensis_
(Crurotarsi, Archosauria) does not need a neotype!
A complex taxonomic tale. To cut a long story short, the two
_Prestosuchus_ specimens described by von Huene (1938, 1942) are
designated lectotype and paralectotype (the lectotype is the one that
preserves its osteoderms). A third specimen that Avazedo (1995)
thought Barbarena (1978) regarded as a _P. chiniquensis_ neotype
(specimen PVT 0156) is a new taxon referred to here as Crurotarsi
indeterminata. However, osteoderms of the lectotype agree with those
of PVT 0156 so it is apparently a composite. My brain hurts, so I'll
Kischlat, E.-E., Mattar, L. C. B and Barbarena, M. C. Evidences for
further studies on _Barbarenasuchus brasiliensis_ (Archosauria:
The sphenosuchian _Barberenasuchus_ is better known thanks to recent
studies: teeth previously thought to be palatal teeth are actually
from the maxilla. The taxon has been included in a cladistic study
but no results are given.
Kischlat, E.-E. What is _Rhadinosuchus_?
In the most recent review of the proterochampsids, Arcucci (1990) did
not include _Rhadinosuchus_. Kischlat says here that there is
sufficient evidence to include it in this group (some of the
tell-tale features were described as indicating proterochampsid
identity by von Huene in 1942). Seeing as Hoffstetter (1955) proposed
Rhadinosuchidae for this taxon, Proterochampsidae Sill 1967 would be
a junior synonym. _Rhadinosuchus_ is not the same as _Cerritosaurus_
being far more gracile and longer snouted: _R._ may be closely
related to the longirostrine proterochampsids (_Chanaresuchus_,
_Gualosuchus_ and _Tropidosuchus_). Arcucci is working on a cladistic
analysis of the group.
Kischlat, E.-E. and Barbarena, M. C. Brazilian dinosaurs: new data.
Yet more new S. American Triassic dinosaurs. The names _Guaibasaurus_
and _Teyuwasu_ are listed as Brazilian Triassic '?prosauropod' [sic]
dinosaurs together with _Spondylosoma_ and _Staurikosaurus_ (see
following abstracts). A pubis associated with an ischium, dorsal and
sacral verts is mentioned: it's from the Botucarai outcrop
(Candelaria City, Rio Grande do Sul) of the Santa Maria Formation.
The pronounced ambiens process recalls _Herrerasaurus_ but it is
implied that the specimen is not from that genus. It's sacrals agree
with _Spondylosoma_ but the ambiens process of the latter is
different. ALSO, authors say that _Staurikosaurus_ does not have a
trochanteric shelf and appears distantly related to herrerasaurids.
Finally, they cite pers. comm. with Peter Galton that _Spondylosoma_
is an herrerasaurid, and point out that the name Spondylosomatidae
von Huene 1942 has priority over Herrerasauridae Benedetto 1973.
de Azevedo, S. A. K. Os dinossauros [sic] Triassicos do sul do
Brasil: dados atualizados novas perspectivas.
Basically says that southern Brazil is a nice place for Triassic
dinosaur discovery (but not in as many, or few, words) and mentions -
and cites the references for - _Guaibasaurus dandelariai_. The two
citations given are abstracts:
1) Bonaparte, J. F. and Ferigolo, J. 1998. A new and primitive
saurischian dinosaur, _Guaibasaurus dandelariai_, gen. et sp. nov.,
from the Late Triassic Caturrita Formation of Southern Brazil.
_Second Symposium Gondwana Dinosaurs - Abstracts_. Tokyo.
2) Langer, M. C., Abdala, N. F. and Richter. M. 1998. new record of
Dinosauria from the Santa Maria Formation (Upper Carnian of the
Parana Basin - Brasil). IN: XIV Jornados Argentinas de Paleontologia
de Vertebados - Resumenes_. Neuquen (Argentina).
Kischlat, E.-E. A new dinosaurian 'rescued' from the Brazilian
Triassic: _Teyuwasu barbarenai_, new taxon.
In reviewing Triassic archosaurs from Rio Grande do Sul for phd work,
Kischlat made _Hoplitosuchus_ Huene 1942 a nomen substitutum for
_Hoplitosaurus_ Huene 1938: I'm not quite sure why. A right femur and
tibia previously referred to this taxon is actually from a dinosaur
and recalls _Marasuchus_ and _Herrerasaurus_: is here named _Teyuwasu
barbarenai_. Generic is from the tupi words te'yu (lizard -
presumably the basis for the word tegu) and wa'su (big): thus 'big
lizard'. Cool. Don't think much of the material though.
de Azevedo, S. A. K., da Rosa, A. A. S., Boelter, R. A. and Leal, L.
A. A prosauropod dinosaur from the Late Triassic of southern Brasil.
Fairly decent material (including left maxilla with 12 teeth, rostral
parts of jaws, pectoral girdles and forelimbs, vertebrae, ribs and
gastralia) from Agua Negra (close to Santa Maria City) in Rio Grande
do Sul (this is a Brazilian state if you're wondering). The teeth are
homodont or weakly heterodont, described as spatulate and with
coarse, obliquely angled serrations.
Kellner, A. W. A. Pterosaurs, a review.
Kellner reiterates his phylogeny where anurognathids are the most
basal pterosaurs and Pterodactyloidea is divided into
Archaeopterodactyloidea and Dsungaripteroidea (pteranodontids,
anhanguerids, tapejairds, azhdarchids etc.). Am surprised to see that
Kellner may still regard _Tapejara_ as a possible herbivore as he
lists 'fructifications' as among the kinds of foods pterosaurs
evolved to eat.
Sayao, J. M. and Kellner, A. W. A. New pterosaur material from the
Crato member (Aptian-Albian) Santana Formation, northeast Brazil.
Complete pterosaur left wing with soft tissue is reported. Estimated
wingspan of about 1.8 m. It differs from _Arthurdactylus_, one of
the two pterosaurs from the unit, in having scapula longer than
coracoid. Has one feature regarded by the authors as an azhdarchid
synapomorphy and also has a strong coracoidal ventral process: bigger
than in anhanguerids and like that of tapejarids. Could the wing be
from _Tapejara_, the other pterosaur from the unit?
Silva, D. de P. and Kellner, A. W. A. Novos dentes de Theropoda do
Cretaceo continental do Brasil.
Some teeth recall those of _Giganotosaurus_ and
_Carcharodontosaurus_. Several localities are mentioned in the text -
I'm not sure which ones the teeth are from.
Further contributions include Bonfim Junior on the dentition of the
Santana Fm. lizard _Tijubina_ (a possible teiid), and de Carvalho
and de Azevedo on mosasaurs (including globidentines,
plioplatecarpins and prognathodonts), plesiosaurs, crocodyliforms
(dyrosaurids) and pterosaurs from the Pernambuco-Paraiba Basin. Hey,
is there anywhere in the Late Cretaceous marine environment where
mosasaurs _weren't_ diverse??:) Dornalles et al. address the
retroarticular musculature of extant alligatorids and what this
might tell us about reconstructing muscles in extinct vertebrates.
There is also a contribution from Cesar L. Schultz and Sergio
Dias-da-Silva on a new pareiasaurid from the Sanga do Cabral
Formation. This has been regarded as Lower Triassic, but the presence
of this pareiasaur (represented only by skull fragment, partial ulna
etc.) suggests it could instead be Permian. The alternative is that
pareiasaurids made it into the Early Triassic.
Finally, there are further abstracts on labyrinthodonts, dicynodonts,
lots on Cainozoic mammals and a few on fishes.
"The wheel is turning, but the hamster is dead."
PALAEOBIOLOGY RESEARCH GROUP
School of Earth, Environmental & Physical Sciences
UNIVERSITY OF PORTSMOUTH
Burnaby Road email: email@example.com
Portsmouth UK tel: 01703 446718
P01 3QL [COMING SOON:
------- End of forwarded message -------