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摩 洛 哥 Argana 盆 地 晚 三 叠 世 一 新<br />
Rauisuchian = A new Rauisuchian (Archosauria,<br />
Suchia) from the upper Triassic of<br />
the Argana basin, Morocco. ( 英 文 ). Jaltl N;<br />
Peyer K. Palaeontology, 2007, 50(2): 417-430<br />
In the 1970s the Upper Triassic strata of the<br />
Argana Basin yielded archosaurian remains<br />
that were tentatively attributed to the rauisuchian<br />
Ticinosuchus. Restudy of this material<br />
together with new remains reveal new anatomical<br />
data and show that it in fact belongs to<br />
a new taxon, Arganasuchus dutuiti gen. et sp.<br />
nov. The systematics of the Rauisuchia are<br />
still unresolved; nevertheless, a monophyletic<br />
suprageneric group can be defined within the<br />
probable non-monophyletic rauisuchians. Arganasuchus<br />
dutuiti differs from all adequately<br />
known rauisuchians in three autapomorphies:<br />
acetabular rim on pubis runs anteroventrally<br />
parallel to pubic shift rather than being terminal<br />
and perpendicular to it; large contribution<br />
of pubis to acetabular depression; palatal<br />
process of maxillary low and confluent with<br />
interdental crest, rather than separated from it<br />
by a large area. The maxilla of Arganasuchus<br />
resembles those of Batrachotomus and Fasolasuchus<br />
in having a Y-shaped rather than a<br />
U-shaped form. As in rauisuchids, Arganasuchus<br />
dutuiti has short cervical vertebrae<br />
and a dorsal border of the proximal extremity<br />
of the pubis that is convex in lateral view. It<br />
shares one derived character state with Batrachotomus<br />
and Postosuchus (a tear-shaped and<br />
anteriorly orientated rugosity on the lateral<br />
side of the pubis, lying on a deep, longitudinal<br />
depression) and one more derived character<br />
state with Batrachotomus (narrow anteacetabular<br />
part of the pubis; hence, the anterior<br />
border of the proximal extremity of the<br />
pubis is almost contiguous with the actabular<br />
rim).<br />
2008010310<br />
德 国 西 南 部 早 侏 罗 世 Posidonia 页 岩 中 蛇 颈<br />
龙 的 分 类 学 和 系 统 学 位 置 = The taxonomic<br />
and phylogenetic position of the Plesiosauroidea<br />
from the lower Jurassic Posidonia shale<br />
of south-west Germany. ( 英 文 ). Großmann F.<br />
Palaeontology, 2007, 50(3): 545-564<br />
The two plesiosauroid species from the<br />
Posidonia shale of Holzmaden, ‘Plesiosaurus’guilelmiimperatoris<br />
and ‘Plesiosaurus’brachypterygius,<br />
do not belong to Plesiosaurus<br />
but form new monotypic genera. The<br />
new genus Hydrorion is erected for<br />
‘P.’brachypterygius, and the genus Seeleyosaurus<br />
is re-established for ‘P.’ guilelmiimperatoris.<br />
The recently described species Plesiopterys<br />
wildii is regarded as a junior synonym<br />
of S. guilelmiimperatoris. A short phylogenetic<br />
analysis shows that<br />
S. guilelmiimperatoris and Muraenosaurus are<br />
basal elasmosaurs. H. brachypterygius, Occitanosaurus<br />
tournemirensis from France and<br />
Microcleidus homalospondylus from England<br />
form a monophyletic clade, which is the sister<br />
taxon to the Cretaceous elasmosaurs. A palaeobiogeographical<br />
comparison of plesiosaur<br />
localities in the Lower Jurassic shows distinct<br />
palaeobiogeographical zones for the Toarcian,<br />
with different plesiosaur taxa in England,<br />
Germany and France<br />
2008010311<br />
南 非 早 三 叠 世 Platycraniellus elegans( 兽<br />
孔 目 , 犬 齿 兽 亚 目 ) 的 重 新 描 述 以 及<br />
Eutheriodonts 的 系 统 关 系 = Redescription<br />
of Platycraniellus elegans (Therapsida, Cynodontia)<br />
from the Lower Triassic of South Africa,<br />
and the Cladistic Relationships of<br />
Eutheriodonts. ( 英 文 ). Abdala F. Palaeontology,<br />
2007, 50(3): 591–618<br />
Platycraniellus elegans is an enigmatic Triassic<br />
cynodont from South Africa that has<br />
only been briefly described previously. New<br />
preparation of the holotype and additional unpublished<br />
material allows a detailed redescription<br />
and comparison with different cynodonts.<br />
Platycraniellus elegans is recognized as a<br />
valid species of basal cynodont. The distinct<br />
suborbital angulation of the zygomatic process,<br />
previously considered as a diagnostic character<br />
in chiniquodontid cynodonts, and more<br />
recently observed in some galesaurids, is also<br />
present in P. elegans. A larger, second specimen<br />
was initially referred to P. elegans, but<br />
most recently considered to belong to Galesaurus<br />
planiceps. Close comparison of this<br />
specimen with the holotype of P. elegans and<br />
with galesaurid specimens allows a tentative<br />
allocation to G. planiceps. A cladistic analysis<br />
of 32 taxa (two gorgonopsians, seven therocephalians<br />
and 23 cynodonts) and 96 craniodental<br />
characters places P. elegans as sister<br />
taxon of Eucynodontia. Results from the<br />
analysis favour a dichotomy between (1) Cynognathia,<br />
including the sectorial-toothed<br />
cynodonts Ecteninion, Cynognathus and the<br />
gomphodont cynodonts, and (2) Probainognathia,<br />
including most sectorial-toothed eucynodonts<br />
(e.g. Lumkuia, Probainognathus,<br />
Chiniquodon), tritheledontids, tritylodontids<br />
and mammaliaforms. The Late Triassic secto-<br />
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