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Re: NEORNITHINE PHYLOGENY etc
Hi Darren - I take it that the chances of the TREE
digit papers being freely available on the net are
nil? The curse of the interested lay person!
Hope you're not a cricket follower :)
--- firstname.lastname@example.org wrote:
> The following just in. Some of them pretty important
> from my biased
> Gardner, J. D. 2001. Monophyly and affinities of
> amphibians (Temnospondyli; Lissamphibia).
> _Zoological J. Linnean
> Society_ 131, 309-352.
> Latest in a series of papers resulting from
> Gardner's phd work. This
> paper definitively refutes arguments that
> albanerpetonids are caudates
> and provides much support for the view that they are
> the sister-taxon to
> Caudata + Salientia. Use of 'Temnospondyli' here is
> a reference to
> Temnospondyli sensu Gauthier et al., obviously. Lot
> of stuff on cranial
> features in albanerpetonids indicative of a shearing
> bite; also
> adaptations for burrowing.
> Galis, F. 2001. Digit identity and digit number:
> indirect support for the
> descent of birds from theropod dinosaurs. _Trends in
> Ecology and
> Evolution_ 16, 16.
> It would seem a little debate on digit homology has
> been going on in
> the pages of TREE, and this is the article that
> started it all.
> Drossopoulou et al. (2000, _Development_ 127:
> 1337-1348) showed
> that manipulation of the Sonic hedgehog gene
> resulted in embryos with
> the same number of digits BUT with different digit
> identities. Inspired,
> Galis suggested that this offered support for Wagner
> and Gauthier's
> model of homeotic change producing the conflict in
> avian digit
> identities. Galis' article prompted the response....
> Feduccia, A. 2001. Digit homology of birds and
> accommodating the cladogram. _TREE_ 16, 285-6.
> Feduccia basically restated the evidence presented
> in Burke and
> Feduccia (1997) that the first digit to condense
> along the primary axis
> MUST be digit IV. While Drossopoulou et al. showed
> that a homeotic
> shift *could* occur, the point, according to
> Feduccia, is: 'whether it
> did occur'. Feduccia goes on to argue that
> palaeontologists are
> distorting things in order to 'accomodate the
> cladogram'. Feduccia's
> article prompted the response....
> Galis, F. 2001. Digit homology of birds and
> dinosaurs: accomodating
> the cladogram. Response to Feduccia. _TREE_ 16, 286.
> To cut a long story short, evidence from the
> embryology of extant birds
> indicates that a homeotic change in digit identity
> >did< occur: Galis
> cites multiple studies which, it is argued, support
> this view. I can't do
> this case justice without going into intricate
> detail, and I'm not about
> to do that.
> Carrano, M. T. 2001. Implications of limb bone
> scaling, curvature and
> eccentricity in mammals and non-avian dinosaurs. _J.
> Zoology_ 254,
> A lot of stuff here, highlighting both differences
> and similarities seen
> between mammal and dinosaur limb bones.
> Haddrath, O. and Baker, A. J. 2001. Complete
> mitochondrial DNA
> genome sequences of extinct virds: ratite
> phylogenetics and the
> vicariance biogeography hypothesis. _Proc. R. Soc.
> Lond. B_ 268,
> Analysis of the data, which includes DNA sequences
> from two moa
> species, supports ratite monophyly and a basal
> position for moa (but,
> as is virtually always the case for DNA studies,
> with kiwis grouping
> with casuariforms and not with moa). In terms of
> biogeography, this
> result means that both kiwis and ostriches diverged
> too recently for
> their distributions to be explained by vicariance
> (but read the paper,
> there is more to it than this).
> Cracraft, J. 2001. Avian evolution, Gondwana
> biogeography and the
> Cretaceous-Tertiary mass extinction event. _Proc. R.
> Soc. Lond. B_
> 268, 459-469.
> This paper is a must-have for those interested in
> Gondwanan origins of
> neornithines, or in the interrelations of
> neornithines. Analysis and
> collation of phylogenetic data for neornithines
> indicate a strong trans-
> Antarctic distribution for basal members of all
> neornithine clades:
> Cracraft looked at palaeognaths (all 8 analysed
> clades likely trans-
> Antarctic), galloanseraens (all 7 analysed clades
> except anatids likely
> trans-Antarctic), gruiforms (all 13 analysed clades
> except turnicids,
> otidids, gruids and rallids likely trans-Antarctic),
> caprimulgiforms and
> apodiforms (all 7 analysed clades except
> caprimulgids and apodids
> likely trans-Antarctic) and passerines (all 7
> analysed clades except
> passeridans likely trans-Antarctic). Thus there is a
> strong trans-
> Antarctic signal for neornithines.
> Cracraft takes issue with claims of northern origin
> for some taxa (e.g.,
> steatornithids and podargids) restricted today to
> the south, many of
> them made by Olson and Feduccia. The data also
> indicates that
> neornithine diversification was underway before the
> end of the
> Cretaceous, thus Cracraft agrees with, e.g., Cooper
> and Penny's results
> and not with Feduccia's post-KT explosion model (the
> radiation hypothesis'). Aspects of the neornithine
> tree favoured by
> Feduccia and Olson (e.g., presbyornithids as
> transitional between
> anseriforms, charadriiforms and phoenicopteriforms)
> are also rejected
> and there are a few stabs at Feduccia and co for
> rejecting cladistic
> analysis when it does not support a favoured view on
> relationships. It
> always strikes me that, whereas many people
> interested in non-avian
> dinosaurs know much about Feduccia and Olson's
> claims regarding
> bird ancestry, few are aware that these workers also
> maintain very
> controversial viewpoints on the phylogeny of
> neornithines, the areas in
> which they do at least have great first hand
> experience. This paper is
> thus a definitive response to claims made by
> Feduccia and co in recent
> works. Cracraft cites as in press the following...
> Cracraft, J. and Clarke, J. 2001. The basal clades
> of modern birds.
> _Bull. Peabody Mus. Yale Univ._.
> I look fwd to it.
> DARREN NAISH
> PALAEOBIOLOGY RESEARCH GROUP
> School of Earth & Environmental Sciences
> UNIVERSITY OF PORTSMOUTH
> Burnaby Building
> Burnaby Road email:
> Portsmouth UK tel (mobile):
> 0776 1372651
> P01 3QL tel (office):
> 023 92842244
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