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Re: Even more last papers for 2005
The Abstracts are as follows:
Senter, P. (2005). Phylogenetic taxonomy and the names of the major
archosaurian (Reptilia) clades . PaleoBios 25: 1-7.
Abstract: "Much disagreement exists as to what names to apply to the major
clades of the reptilian taxon Archosauria. Even among practitioners of
phylogenetic taxonomy, there has been a tendency to apply the principles of
phylogenetic taxonomy to the naming of some archosaurian clades while
resisting the principles of phylogenetic taxonomy for other clades. Here,
the principles of phylogenetic taxonomy are applied to the major clades of
Archosauria, and the correct names for these clades within the paradigm of
phylogenetic taxonomy are delineated. Within this paradigm, the names of
the major archosaurian clades are as follows. Archosauria: the most
exclusive clade containing Crocodylia and Aves. Archosauriformes: the most
exclusive clade containing _Proterosuchus_ and Archosauria. Pseudosuchia:
the most inclusive clade within Archosauria that includes Crocodylia but not
Aves. Crurotarsi: the most exclusive clade containing Parasuchia,
Ornithosuchidae, _Prestosuchus_, and Suchia. Ornithosuchia: the most
inclusive clade within Archosauria that includes Aves but not Crocodylia.
Ornithodira: the most exclusive clade containing Pterosauria,
_Scleromochlus_ and Dinosauromorpha. Avialae: the most inclusive clade
containing ornithuran birds but not deinonychosaurian theropods. Aves: the
most exclusive clade containing _Archaeopteryx_ and extant birds.
Neornithes: the most exclusive and extant birds. [sic]"
I have to say I'm a little underwhelmed by some of these definitions. I
especially hate the definition of Pseudosuchia. I think Sereno is dead
right when he threw Pseudosuchia on the dung heap. Worst of all,
Pseudosuchia is defined by Senter to include crocodylians. So, let me get
this straight... Pseudosuchia, which means "false crocodiles", now includes
Senter, P. and Parrish, J.M. (2005). Functional analysis of the hands of
the theropod dinosaur _Chirostenotes pergracilis_: evidence for an unusual
paleoecological role. PaleoBios 25: 9-19.
Abstract: "We report the first functional study of the forelimbs of an
oviraptorosaurian dinosaur. The diet of these typically toothless dinosaurs
has long been a mystery. The hands of the Late Cretaceous North American
oviraptorosaur _Chirostenotes pergracilis_ exhibit a greatly elongated
second digit with an unusually straight ungual, the functional significance
of which has not previously been explored. Direct manipulation of the
manual skeleton of _C. pergracilis_ and comparison with other theropods
reveals that the range of motion in its hands is not greatly modified from
the plesiomorphic maniraptoran condition. From this we infer that the
significance of the modified second finger of _Chirostenotes_ is unrelated
to functions that would have required a change in manual range of motion and
is instead related to some function requiring one finger to be much longer
than the others. Comparison with the anatomical requirements for a variety
of manual functions shows that the modification of digit II in
_Chirostenotes_ possibly is related to the probing of crevices to apprehend
prey. Such prey would have to be soft-bodied enough to impale and extract,
small enough to extract with one claw, and large and/or abundant enough to
sustain a predator with a manual modification that suggests specialization
for said prey. The morphology of and range of motion in the hand of
_Chirostenotes_ are also compatible with a hooking function but not with
digging or one-handed prehension."
This last sentence, especially the lack of "one-handed prehension", reminds
me of Gishlick's biomechanical work on _Deinonychus_.
From: Jay <email@example.com>
To: DML <firstname.lastname@example.org>
Subject: Re: Even more last papers for 2005
Date: Fri, 13 Jan 2006 02:35:26 -0800 (PST)
And more (if these have not yet mentioned):
PaleoBios CURRENT ISSUE
25(3), December 23, 2005
SENTER, P. Phylogenetic taxonomy and the names of the major archosaurian
PaleoBios, v. 25, n. 2, p. 1-7.
SENTER, P. and PARRISH, J.M. Functional analysis of the hands of the
Chirostenotes pergracilis: evidence for an unusual paleoecological role.
PaleoBios, v. 25, n. 2,