Results 31 to 40 of about 1,496 (213)

First North American occurrences of Qiupalong (Theropoda: Ornithomimidae) and the palaeobiogeography of derived ornithomimids

FACETS, 2017
Ornithomimid material from the Belly River Group (Campanian) of Alberta, Canada is described as sharing characters with Qiupalong henanensis from the Qiupa Formation of Henan Province, China. Derived characters and character combinations of the pubis and
Bradley McFeeters, Michael J. Ryan, Claudia Schröder-Adams, Philip J. Currie   +3 more
doaj   +1 more source

A new sediment-dwelling pholadid bivalve from Oligocene glaciomarine sediments of King George Island, West Antarctica [PDF]

Acta Palaeontologica Polonica, 2016
We present a re-description of the pholadid bivalve from the Oligocene Polonez Cove Formation, King George Island, West Antarctica, previously identified as Penitella sp. The study is based on a collection of 210 specimens, preserved exclusively in life
Krzysztof Hryniewicz, Andrzej Gaździcki
doaj   +1 more source

Drivers of tail evolution in squamates and their implications for the fossorial origin of snakes

The Anatomical Record, EarlyView.
Abstract The axial skeleton serves as the primary structural support in all vertebrates and is subdivided into five distinct regions: cervical, thoracic, lumbar, sacral, and caudal. Relaxation of constraints acting on the terminal end of the axial skeleton has led to remarkable variation in caudal vertebrae number across Squamata.
Olivia Binfield, Marco Camaiti, Lucy Roberts   +2 more
wiley   +1 more source

FIG. 1 in Mud lobster Thalassina Latreille, 1806 (Decapoda: Gebiidea: Thalassinidae), its Cenozoic occurrences in Italy and palaeobiogeography

, 2022
FIG. 1. — Body plan of Thalassina as exemplified on extant T. anomala (Herbst, 1804): A, lateral view; B, dorsal view; C, closer view on pereiopod 1. Photo: A. De Angeli). Scale bar: 10 mm.Published as part of Hyžný, Matúš & Angeli, Antonio De, 2022, Mud
Hyžný, Matúš, Angeli, Antonio De
core   +1 more source

Early Cenomanian ammonites from East and North-East Greenland

GEUS Bulletin
Early Cenomanian (100.5–95.7 Ma) ammonite faunas from East and North-East Greenland collected by the late Simon Kelly and colleagues are described. The assemblages are dominated by typically boreal Schloenbachia varians (J. Sowerby 1817).
W. James Kennedy, Simon R. A. Kelly, Simon Schneider   +2 more
doaj   +1 more source

The unexpected survival of an ancient lineage of anseriform birds into the Neogene of Australia: the youngest record of Presbyornithidae [PDF]

Royal Society Open Science, 2016
Presbyornithids were the dominant birds in Palaeogene lacustrine assemblages, especially in the Northern Hemisphere, but are thought to have disappeared worldwide by the mid-Eocene.
Vanesa L. De Pietri, R. Paul Scofield, Nikita Zelenkov, Walter E. Boles, Trevor H. Worthy   +4 more
doaj   +1 more source

Redescription of the cranial morphology of Amphisbaena braestrupi and Amphisbaena laurenti (Squamata: Amphisbaenidae) from the Pleistocene of Brazil using x‐ray computed tomography

The Anatomical Record, EarlyView.
Abstract Amphisbaenians (Squamata: Amphisbaenidae) are fossorial reptiles with highly specialized cranial morphology, yet their fossil record is frequently limited by fragmentary preservation. This study provides a detailed osteological redescription of the skulls of Amphisbaena braestrupi and Amphisbaena laurenti from the Pleistocene of Lagoa Santa ...
Carolina L. Paiva, Henrique C. Costa, Christy A. Hipsley   +2 more
wiley   +1 more source

Osteology and relationships of Rhinopycnodus gabriellae gen. et sp. nov. (Pycnodontiformes) from the marine Late Cretaceous of Lebanon [PDF]

, 2013
The osteology of Rhinopycnodus gabriellae gen. and sp. nov., a pycnodontiform fish from the marine Cenomanian (Late Cretaceous) of Lebanon, is studied in detail.
Taverne, Louis, Taverne, Louis., Luigi Capasso, Capasso, Luigi, Louis Taverne   +4 more
core   +1 more source

Boreal waterways: An Early Cretaceous plesiosaur from Ellesmere Island, Nunavut, Canadian Arctic and its palaeobiogeography [PDF]

Acta Palaeontologica Polonica
A plesiosaur specimen collected from Ellesmere Island (Nunavut, Arctic Canada) by Danish geologist Johannes Troelsen in 1952 is described for the first time. The plesiosaur is late Berriasian to early Valanginian in age based on palynostratigraphy.
Lene L. Delsett, Adam S. Smith, Stephen Ingrams, Simon Schneider   +3 more
doaj   +1 more source

Fossil freshwater sponges: Taxonomy, geographic distribution, and critical review [PDF]

Acta Palaeontologica Polonica, 2017
Sponges are one of the most ancient animal phyla with about 8850 living species and about 5000 described fossil taxa. Most sponges are marine and live at all depths of all oceans.
Roberto Pronzato, Andrzej Pisera, Renata Manconi   +2 more
doaj   +1 more source