Results 21 to 30 of about 206 (131)

Large‐Scale Tectonic Forcing of the African Landscape

Journal of Geophysical Research: Earth Surface, Volume 126, Issue 12, December 2021., 2021
Abstract Successful inverse modeling of observed longitudinal river profiles suggests that fluvial landscapes are responsive to continent‐wide tectonic forcing. However, inversion algorithms make simplifying assumptions about landscape erodibility and drainage planform stability that require careful justification.
C. P. B. O’Malley, N. J. White, S. N. Stephenson, G. G. Roberts   +3 more
wiley   +1 more source

Evolutionary–phylogenetic pathway of the Cretaceous ammonite genus Aegocrioceras and its relationship to Juddiceras spp. and Crioceratites spp.

Papers in Palaeontology, Volume 7, Issue 4, Page 2113-2139, November 2021., 2021
Abstract The systematics of ammonoids are complicated by their large degree of intraspecies variation, which complicates a stable validation of species. Aegocrioceras is a heteromorph ammonite from the Lower Saxony Basin in the Hauterivian Boreal, and a prime example of a genus with an unstable internal systematic and external relationship to other ...
Manuel F. G. Weinkauf, René Hoffmann, Kurt Wiedenroth, Dieter Korn   +3 more
wiley   +1 more source

Morphological disparity in extant and extinct sepiid phragmocones: morphological adaptions for phragmocone strength compared to those related to cameral liquid emptying hypotheses

Swiss Journal of Palaeontology, 2022
The phragmocone-bearing coleoid cephalopods Sepia, Sepiella, Metasepia and Hemisepius (sepiids) are the most diverse of all extant chambered cephalopods and show the highest disparity.
Peter D. Ward, Job Lukas Veloso, Christian Klug   +2 more
doaj   +1 more source

Ups and downs of belemnite diversity in the Early Jurassic of Western Tethys

Palaeontology, Volume 64, Issue 2, Page 263-283, March 2021., 2021
Abstract Although belemnites form a major clade of extinct cephalopods, the early stage of their diversification remains poorly known in time and space. Here we investigate the first diversification episodes of belemnites (order Belemnitida) using a new species‐level database encompassing the Hettangian–Aalenian interval (Early Jurassic – earliest ...
Pascal Neige, Robert Weis, Emmanuel Fara, Dieter Korn   +3 more
wiley   +1 more source

The geography of body size in cuttlefishes (Cephalopoda, Sepiidae)

Swiss Journal of Palaeontology, 2021
This study explores body size in sepiids (Cephalopoda, Sepiidae) on the interspecific scale and provides an overview of their geographical distribution. Results reveal a highly skewed distribution of body size variation for raw values and a nearly normal
Pascal Neige
doaj   +1 more source

Hettangian, Early Jurassic coleoids from West Somerset, SW England—filling a gap in the coleoid record of NW Europe [PDF]

Acta Palaeontologica Polonica
The semi-articulated remains of two specimens of the putative diplobelid coleoid species of Clarkeiteuthis and a coleoid of uncertain affinity (possibly a phragmoteuthid) are described from a single bed in the Blue Lias Formation (early Hettangian ...
DAVID H. EVANS, CHRISTIAN KLUG, ANDREW H. KING, KEVIN N. PAGE   +3 more
doaj   +1 more source

APPLYING MICRO-CT IMAGING IN THE STUDY OF HISTORICALLY AND NEWLY COLLECTED SPECIMENS OF BELOSAEPIA (SEPIIDA, COLEOIDEA, CEPHALOPODA) FROM THE EARLY EOCENE (YPRESIAN) OF BELGIUM

Rivista Italiana di Paleontologia e Stratigrafia, 2022
The application of high-resolution X-ray computed tomography permits an appraisal of historically and newly collected specimens of Belosaepia (Belosaepiidae, Coleoidea, Cephalopoda) from the Ypresian (Early Eocene) of Belgium and provides resolution ...
Stijn Goolaerts, YOERI CHRISTIAENS, FREDERIK H. MOLLEN, BERNARD MOTTEQUIN, ETIENNE STEURBAUT   +4 more
doaj   +1 more source

Intraspecific variation and new morphological characters revealed by multimodal imaging analysis on the Late Cretaceous coleoid Dorateuthis syriaca [PDF]

Acta Palaeontologica Polonica
The Cretaceous outcrops of Haqel, Hjoula (Cenomanian) and Sahel Aalma (Santonian) in Lebanon are renowned for their exceptional preservation of coleoid soft tissue in coeval shallow carbonate mud deposits and provide an unmatched opportunity to study ...
Alison J. Rowe, Isabelle Kruta, Loïc Villier, Pierre Gueriau, Marie Radepont, Oulfa Belhadj, Katharina Müller, Romain Jattiot, Dirk Fuchs, Thomas Clements, Sylvain Charbonnier, Isabelle Rouget   +11 more
doaj   +1 more source

First record of non-mineralized cephalopod jaws and arm hooks from the latest Cretaceous of Eurytania, Greece

Swiss Journal of Palaeontology, 2020
Due to the lower fossilization potential of chitin, non-mineralized cephalopod jaws and arm hooks are much more rarely preserved as fossils than the calcitic lower jaws of ammonites or the calcitized jaw apparatuses of nautilids. Here, we report such non-
Christian Klug, Donald Davesne, Dirk Fuchs, Thodoris Argyriou   +3 more
doaj   +1 more source

First record of the enigmatic coleoid genus Longibelus from Sakhalin (Far East Russia): a contribution to our understanding of Cretaceous coleoid habitats in the Pacific Realm

Swiss Journal of Palaeontology, 2021
A newly collected specimen of the enigmatic coleoid genus Longibelus is recorded from lower Turonian strata along the River Shadrinka in Sakhalin (Russian Far East). To date, this is the first record of Late Cretaceous coleoid cephalopods from the island
Elena A. Jagt-Yazykova, Martin Košťák, John W. M. Jagt   +2 more
doaj   +1 more source