Results 31 to 40 of about 828 (171)

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

open access: yesActa 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   +11 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

open access: yesSwiss 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   +2 more
doaj   +1 more source

Relationship of Cephalopods Orders Based on Morphological Characters

open access: yesJurnal Kelautan Tropis, 2022
Biodiversity is vital in our daily life. As a maritime country, Indonesian waters harbor many valuable animals such as Cephalopoda. Indonesian waters are rich in various species of cephalopods. Several previous studies on Indonesian cephalopods have been
Nova Mujiono, Putri Sapira Ibrahim
doaj   +1 more source

The palaeobiology of belemnites – foundation for the interpretation of rostrum geochemistry

open access: yesBiological Reviews, Volume 95, Issue 1, Page 94-123, February 2020., 2020
ABSTRACT Belemnites are an extinct group of Mesozoic coleoid cephalopods with a fossil record ranging from the early Late Triassic [about 240 million years ago (Mya)] to the Cretaceous/Palaeogene boundary (65 Mya). Belemnites were widely distributed, highly abundant and diverse, and an important component of Mesozoic marine food webs.
René Hoffmann, Kevin Stevens
wiley   +1 more source

An Early Triassic gladius associated with soft tissue remains from Idaho, USA—a squid-like coleoid cephalopod at the onset of Mesozoic Era [PDF]

open access: yesActa Palaeontologica Polonica, 2018
We describe an Olenekian (Early Triassic) “fossil squid” belonging to the oldest complex Mesozoic marine biota collected in the Lower Shale unit of the Lower Triassic Thaynes Group in Idaho, USA. The studied specimen shows a tapered structure embedded in
Larisa A. Doguzhaeva   +9 more
doaj   +1 more source

Morphology of the digestive apparatus of Enteroctopus megalocyathus and Loligo sanpaulensis (Mollusca, Cephalopoda) [PDF]

open access: yes, 2002
A detailed description of the morphology of the digestive organs of Enteroctopus megalocyathus (Gould, 1852) and Loligo sanpaulensis Brakoniecki, 1984 is given.
Garri, Rosana, Re, Maria Edith
core   +1 more source

Conellae, enigmatic structures on cephalopod shells—shapes, distribution, and formation [PDF]

open access: yes, 2019
Conellae, enigmatic cone-shaped structures which can be found on the surface of internal moulds of cephalopod shells (predominantly of ammonoids), are regarded herein as the product of remote (biologically induced) biomineralization formed in closed-off ...
Hoffmann, René   +2 more
core   +1 more source

The shell structure and chamber production cycle of the cephalopod Spirula (Coleoidea, Decabrachia)

open access: yesMarine Biology, 2022
AbstractThe endocochleate coleoid cephalopod Spirula spirula, the only present-day representative of the order Spirulida, secretes a coiled shell consisting of a series of chambers divided by septa and connected by a siphuncle. It is the shell closest to those of Recent and extinct ectochleate cephalopods: nautiloids, ammonoids.
Antonio G. Checa   +6 more
openaire   +5 more sources

Isotopic evidence for long term warmth in the Mesozoic. [PDF]

open access: yes, 2013
PMCID: PMC3595697Atmospheric CO2 concentrations appear to have been considerably higher than modern levels during much of the Phanerozoic and it has hence been proposed that surface temperatures were also higher.
Buono, G   +3 more
core   +2 more sources

Subclass Coleoidea: Introduction

open access: yes, 1998
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Lu, Chung Cheng, Dunning, Malcolm C
openaire   +1 more source

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