Results 31 to 40 of about 3,962 (222)

Faunal change in Cretaceous endemic shallow-marine bivalve genera/subgenera of the northeast Pacific [PDF]

, 2020
Endemic shallow-marine Cretaceous bivalves in the northeast Pacific region (NEP), extending from southwestern Alaska to the northern part of Baja California Sur, Mexico, are tabulated and discussed in detail for the first time.
Squires, Richard L.
core  

A new rhynchocephalian from the late jurassic of Germany with a dentition that is unique amongst tetrapods. [PDF]

, 2012
Rhynchocephalians, the sister group of squamates (lizards and snakes), are only represented by the single genus Sphenodon today. This taxon is often considered to represent a very conservative lineage.
A Günther, A Hallam, A López-Arbarello, AB Heckert, Adriana López-Arbarello, Alexander M. Heyng, Andreas Hecker, Andrew A. Farke, CY-J Ung, DA Didier, DC Kalthoff, DI Whiteside, DU Schmid, ED Cope, FH Pough, FT Fürsich, GC Gorniak, GH Dalrymple, H-D Sues, HS Harrison, J Müller, KSW Campbell, M Cocude-Michel, MEH Jones, MEH Jones, MEH Jones, MEH Jones, MJ Benton, NC Fraser, NC Fraser, NC Fraser, NC Fraser, O Rieppel, O Rieppel, Oliver W. M. Rauhut, PR Bell, RE Espinoza, S Apesteguía, S Apesteguía, S Meiri, SE Evans, SE Evans, SM Reilly, T Ørvig, T Ørvig, V Dupret, V-H Reynoso, VH Reynoso, VH Reynoso, VH Reynoso, Z-X Luo   +50 more
core   +2 more sources

Revisiting the choristodere and stem-lepidosaur specimens of the Guimarota Beds (Kimmeridgian, Portugal): taxonomic implications [PDF]

Acta Palaeontologica Polonica
The Guimarota beds (Kimmeridgian, Portugal) constitute one of the richest microvertebrate assemblages for the Upper Jurassic, which include a diverse fauna of small reptiles.
ALEXANDRE R.D. GUILLAUME, EDUARDO PUÉRTOLAS-PASCUAL, MIGUEL MORENO-AZANZA   +2 more
doaj   +1 more source

The oldest post-Paleozoic (Ladinian, Triassic) brachiopods from the Betic Range, SE Spain [PDF]

Acta Palaeontologica Polonica, 2018
Triassic brachiopods from the Betic Range were unknown hitherto. Herein we describe the first brachiopod occurrences in the early Ladinian of this domain referable to a new genus and species Misunithyris goyi derived from three localities of the south ...
José Francisco Baeza-Carratalá, Fernando Pérez-Valera, Juan Alberto Pérez-Valera   +2 more
doaj   +1 more source

A new Megatheriinae skull (Xenarthra, Tardigrada) from the pliocene of northern venezuela – Implications for a giant sloth dispersal to central and North America [PDF]

, 2018
A skull of a ground sloth from the Pliocene San Gregorio Formation documents a northern neotropical occurrence of a megatheriine that addresses issues on intraspecific variation and biogeography. The new specimen is broadly similar in size and morphology
Brandoni, Diego, Carlini, Alfredo Armando, Sánchez Villagra, Marcelo R., Sánchez, Rodolfo   +3 more
core   +2 more sources

Late Ordovician (Sandbian–Hirnantian) marine gastropods from the Argentine Precordillera: their biogeographical significance in a middle to high latitudinal setting [PDF]

Acta Palaeontologica Polonica
Gastropods from the Upper Ordovician of the Argentine Precordillera received less attention than other coeval marine invertebrates in this region. The present contribution supplies accurate taxonomic information recovering 10 gastropod genera which are ...
Mariel Ferrari, Verónica Bertero, Marcelo G. Carrera   +2 more
doaj   +1 more source

Late Silurian palynomorphs from the Precordillera of San Juan, Argentina: Diversity, palaeoenvironmental, and palaeogeographic significance [PDF]

Acta Palaeontologica Polonica, 2018
The palynological content from the Cerro La Chilca and Quebrada Ancha sections of the Wenlock? to Přídolí Los Espejos Formation, in the Argentinean Precordillera is studied.
Victoria J. García Muro, Claudia V. Rubinstein, Philippe Steemans   +2 more
doaj   +1 more source

Palaeobiogeographical study of the Late Ordovician brachiopods of Iran based on quantitative analysis [PDF]

Journal of Stratigraphy and Sedimentology Researches
Brachiopods, as one of the most important benthic fauna in the Late Ordovician, show a great abundance and diversity in many continents.
Akbar Sohrabi
doaj   +1 more source

A new species of Lonchidiidae (Hybodontiformes) from the Late Jurassic of Brazil (Aliança Formation, Jatobá Basin)

The Anatomical Record, EarlyView.
Abstract The Aliança Formation (Jatobá Basin) represents lacustrine deposits formed in oxygenated waters that hosted a diverse fauna, including Hybodontiform sharks. Within this group, the Family Lonchidiidae comprises 11 valid genera, with Parvodus previously reported in Brazilian deposits from the Brejo Santo Formation (Araripe Basin, Late Jurassic ...
Larissa de Souza Ribeiro, Marco Aurélio Gallo de França   +1 more
wiley   +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