Results 11 to 20 of about 15,555 (262)

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

open access: yesActa Palaeontologica Polonica, 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 ...
René Hoffmann   +2 more
doaj   +4 more sources

Fatty Acids and Stomach Contents Reveal Dietary Overlaps of Two Prospering Squid Species in the North Sea. [PDF]

open access: yesEcol Evol
Distribution ranges of cephalopods are expanding worldwide and their abundances are increasing due to ocean warming. Recently, the broadtail shortfin squid Illex coindetii (Ommastrephidae) expanded into the North Sea where it established a successful spawning stock beside the resident veined squid Loligo forbesii (Loliginidae). Stomach content analysis
Rittinghaus H   +4 more
europepmc   +2 more sources

Discovery of a mud-covering cephalopod evidences the complex life habits in the abyss. [PDF]

open access: yesEcology
Ecology, Volume 106, Issue 11, November 2025.
Mejía-Saenz A   +5 more
europepmc   +2 more sources

Biodiversity and Conservation of Marine Mollusks in the Indo-Pacific Convergence Zone. [PDF]

open access: yesEcol Evol
An integrated assessment has identified 11 priority mollusk conservation areas in the Indo‐Pacific Convergence Zone, which harbor 47.9% of species and 58.9% of threatened taxa, though only 18.7% have MPA coverage. Multi‐habitat zones, such as coral–mangrove areas, support 42.3% of molluscan diversity.
Lai X   +6 more
europepmc   +2 more sources

Functional Trait Divergence in Feeding Ecology Between Two Closely Related <i>Upeneus</i> Species in the Beibu Gulf: An Ecological Morphology Analysis. [PDF]

open access: yesEcol Evol
This research not only provides new insights into the niche differentiation and adaptive evolution of closely related species but also offers significant evidence for understanding resource allocation mechanisms within ecosystems. ABSTRACT Closely related species coexisting in the same habitat often undergo niche differentiation or morphological ...
Fu J   +7 more
europepmc   +2 more sources

Pseudogzheloceras—a new genus of Carboniferous nautilids (Cephalopoda) from Europe and North Africa

open access: yesGeo&Bio, 2021
Analysis of morphology, stratigraphic and geographic distribution of the group of nautilid species, mainly from the Westphalian of Western Europe, and the Bashkirian and Moscovian of the Donets Basin (Eastern Ukraine) made it possible to establish a new ...
V. Dernov
doaj   +1 more source

Non-destructive analysis of pathological belemnite rostra by micro-CT techniques [PDF]

open access: yesActa Palaeontologica Polonica, 2020
Previously, palaeopathological features of fossil hardparts were often difficult to interpret because it was impossible to decipher their internal structure without destroying the specimens. We applied high-resolution computedtomo graphy (CT) to document
René Hoffmann   +4 more
doaj   +1 more source

Biología y ecología del calamar Dosidicus gigas (Cephalopoda) en aguas chilenas: una revisión [PDF]

open access: yes, 2015
Indexación: Web of Science; Scielo.ABSTRACT. The jumbo squid Dosidicus gigas is the most abundant cephalopod species in the southeastern Pacific Ocean, which supports the biggest cephalopod fishery in the world.
Ibáñez, Christian M.   +4 more
core   +9 more sources

Spatial and Temporal Characteristics of Demersal Assemblages in Sığacık Bay, Central Aegean Sea, Turkey

open access: yesÇanakkale Onsekiz Mart University Journal of Marine Sciences and Fisheries, 2021
This study aimed to determine the spatial and temporal variation of species diversity and CPUE in trawl fisheries in the Central Aegean Sea (Sığacık Bay). The study also aimed to evaluate changes in some biometric parameters (mean and frequency of length)
Hakkı DERELİ
doaj   +1 more source

Palaeobiology and evolutionary context of Angulithes mermeti, a streamlined early Late Cretaceous shallow-water nautiloid [PDF]

open access: yesActa Palaeontologica Polonica, 2019
Cretaceous nautiloids are commonly characterized by inflated shells and prolonged stratigraphic ranges. In the Albian, the species of Angulithes appeared and compressed, short-lived forms with narrow venters emerged during the Cenomanian age.
Markus Wilmsen , Emad Nagm
doaj   +1 more source

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