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New Pliosaurus species from Argentina, Japanese choristodere, and other papers

From: Ben Creisler

Some recent (and no so recent) papers:

Zulma Gasparini & José P. O'Gorman (2014)
A New Species of Pliosaurus (Sauropterygia, Plesiosauria) from the
Upper Jurassic of Northwestern Patagonia, Argentina.
Ameghiniana (advance online publication)

A new pliosaurid species, Pliosaurus patagonicus sp. nov., from the
middle Tithonian, Vaca Muerta Formation, Neuquén Province, Argentina
is described. This new species is based on a autapomorphic trait, the
distance between the posterior functional alveolus and coronoid
eminence (300 mm) equivalent to the last fourteen alveoli, and a
unique combination of characters: short and robust mandibular
symphysis with six pairs of functional alveoli; almost constant
dorsoventral dimension of symphysis in lateral view; low coronoid
eminence, mandibular rami almost straight, and the distance between
the posterior functional alveolus and coronoid eminence equivalent to
the last fourteen alveoli. As in other Pliosaurus species the new
taxon has trihedral teeth but lack the typical lateral expansion of
the mandibular symphysis. This new record reinforces the hypothesis of
a trend toward the shortening of the mandibular symphysis observed in
species from the upper Kimmeridgian–Tithonian of the Northern
Hemisphere. The presence of the macropredator Pliosaurus patagonicus
sp. nov. in a protected marine environment close to the coast may be
interpreted as its entry for prey capture and/or for reproduction.


Ryoko Matsumoto, Makoto Manabe & Susan E. Evans (2014)
The first record of a long-snouted choristodere (Reptilia, Diapsida)
from the Early Cretaceous of Ishikawa Prefecture, Japan.
Historical Biology (advance online publication)

A longirostrine choristoderan reptile is described from the Early
Cretaceous Tetori Group on the basis of an associated specimen from
the Kuwajima Formation, Ishikawa Prefecture. This is the first report
of Neochoristodera from Japan. However, the brevirostrine
Monjurosuchus has already been reported from the same deposit, and the
long-necked Shokawa was recovered from the Okurodani Formation, which
is a lateral equivalent of the Kuwajima Formation. This new material
demonstrates that the three known choristoderan morphotypes
(short-necked longirostrine, short-necked brevirostrine and
long-necked brevirostrine) were all present in the Early Cretaceous
deposits of the Tetori Group. Until now, the Jiufotang Formation of
China was the only deposit where all three were known to have


A couple of older papers in open access not yet mentioned on the DML:

Brusatte, S. L., Vremir, M., Watanabe, A., Csiki-Sava, Z., Naish, D.,
Dyke, G., Erickson, G. M. & Norell, M. A. (2013)
An infant ornithopod dinosaur tibia from the Late Cretaceous of Sebeş, Romania.
Terra Sebus. Acta Musei Sabesiensis 5: 627-644.


J. Herrero Gascón & F. Pérez-Lorente (2013)
Icnitas terópodas, saurópodas y tireóforas (Jurásico
Superior-Cretácico Inferior) en Moscardón (Teruel, España) [Theropod,
sauropod and thyreophoran footprints (Late Jurassic-Early Cretaceous)
found in Moscardón (Teruel, Spain)]
Geogaceta 54: 67-70

In this work, dinosaur footprints, from the village of Moscardón
(Teruel) are cited for the first time They are four footprints
(natural casts) imprinted by four different dinosaurs.We place the
three new sites and we describe the natural casts found. The result
has been the identification of one theropod, two sauropod and a
stegosaur ichnites, and the recognition of special structures in the
last three, which have allowed us to analyse certain details on foot
movement and deformation of digital pads.


This paper was cited on the DML back in January but the entire
monograph is now available for free at the link below:

Christophe Hendrickx & Octávio Mateus (2014)
Abelisauridae (Dinosauria: Theropoda) from the Late Jurassic of
Portugal and dentition-based phylogeny as a contribution for the
identification of isolated theropod teeth.
Zootaxa 3759 (1): 001–074 (30 Jan. 2014)