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skull design indicates that the total leverage of
the inferred jaw musculature provides force
rather than speed.
2010040383
东 欧 窝 龙 类 迷 龙 的 新 数 据 :2. Trematosaurus
galae 新 种 : 颅 骨 的 形 态 学 = New data
on trematosauroid labyrinthodonts of Eastern
Europe: 2. Trematosaurus galae sp. nov.: Cranial
morphology. ( 英 文 ). Novikov I V. Paleontological
Journal, 2010, 44(4): 457-467 1
图 版 .
The cranial morphology of a new species of
the genus of Trematosaurus, T. galae sp. nov.,
represented by fragmentary specimens from
the Lower Triassic Donskaya Luka locality
(Volgograd Region), is described in detail.
The diagnosis of the genus Trematosaurus is
amended.
2010040384
瑞 典 南 部 坎 帕 期 ( 晚 白 垩 世 ) 蛇 颈 龙 肢 骨
上 的 沧 龙 咬 痕 = Mosasaur bite marks on a
plesiosaur propodial from the Campanian
(Late Cretaceous) of southern Sweden. ( 英 文 ).
Einarsson E; Lindgren J; Kear BP; Siverson M.
GFF, 2010, 132(2): 123-128
Although plesiosaurs and mosasaurs coexisted
for about 35 million years at the end of
the Cretaceous, the fossil record documenting
interactions between these two groups of marine
reptiles is meagre. The discovery of
deeply incised scars on a limb bone of an immature
polycotylid plesiosaur from the latest
early Campanian (in the European two-fold
division of the Campanian Stage) of the Kristianstad
Basin, southern Sweden, is thus significant
because it represents a rare example
of predation or scavenging on an immature
polycotylid plesiosaur by a large mosasaur.
2010040385
对 Ianthasaurus hardestiorum 新 标 本 的 描
述 和 edaphosaurid 系 统 演 化 的 再 评 估 =
Description of a new specimen of Ianthasaurus
hardestiorum (Eupelycosauria: Edaphosauridae)
and a re-evaluation of edaphosaurid
phylogeny. ( 英 文 ). Mazierski D M;
Reisz R R. Canadian Journal of Earth Sciences,
2010, 47(6): 901-912
Ianthasaurus hardestiorum, a basal edaphosaurid
from the Upper Pennsylvanian of
Garnett, Kansas, has been described on the
basis of two incomplete, juvenile specimens
and a series of disarticulated vertebral elements.
New skeletal material of this poorly
known species includes previously unknown
cranial elements, increasing our knowledge of
the anatomy and variation in this taxon. The
complete ossification of the neural arches and
the overall larger size of the vertebrae relative
to those previously described indicate that
they were part of an adult individual, and
marginal tooth morphology resembles more
closely that seen in the genus Edaphosaurus.
Phylogenetic analysis of edaphosaurid synapsids
confirms the hypothesis that Ianthasaurus
is a sister-taxon of all other members of the
clade. However, the incomplete fossil record
of other putative edaphosaurids, such as Lupeosaurus
and Glaucosaurus, makes full resolution
of their phylogenetic interrelationships
difficult to assess.
2010040386
加 拿 大 艾 伯 塔 清 水 组 晚 白 垩 世 鱼 龙 一 新 属
= A new Lower Cretaceous (lower Albian)
ichthyosaur genus from the Clearwater Formation,
Alberta, Canada. ( 英 文 ). Druckenmiller
P S; Maxwell E E. Canadian Journal of Earth
Sciences, 2010, 47(8): 1037-1053
A new, articulated skeleton of an ichthyosaur
from the Lower Cretaceous (lower Albian)
Wabiskaw Member of the Clearwater Formation
near Fort McMurray, Alberta, is the most
complete and stratigraphically oldest known
ichthyosaur from the Cretaceous of North
America and represents a new genus and species
of ophthalmosaurian, Athabascasaurus
bitumineus. The specimen consists of a nearly
complete, dorsoventrally compressed skull, a
complete and articulated presacral and partial
caudal vertebral series, portions of the right
pectoral girdle, and the right pelvic girdle and
femur. The new taxon is characterized by the
lack of a robust supranarial process of the
premaxilla, an elongate maxilla that has its
tallest point (in lateral view) posterior to the
external naris, a wide postorbital region, the
presence of a rectangular squamosal, an angular
with greater lateral exposure on the posterior
jaw ramus than the surangular, a dentition
with extremely light enameled ridges, and a
reduced presacral count of 42 vertebrae. The
first species-level phylogenetic analysis of
Ophthalmosauria reveals that Athabascasaurus
is neither the sister taxon of, nor nests
within Platypterygius, a geographically widespread,
geologically long-lived, and taxonomically
problematic genus. Athabascasaurus
adds important new data on the morphology
of Cretaceous ichthyosaurs and expands
our knowledge of the palaeoecology and ma-
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