Results 21 to 30 of about 5,360 (220)
Non-destructive analysis of pathological belemnite rostra by micro-CT techniques [PDF]
Acta 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
Pseudogzheloceras—a new genus of Carboniferous nautilids (Cephalopoda) from Europe and North Africa
Geo&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
Çanakkale 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
Conellae, enigmatic structures on cephalopod shells—shapes, distribution, and formation [PDF]
Acta 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 +1 more source
Mapping molluscan endocrinology: a systematic and critical appraisal. [PDF]
Biol Rev Camb Philos SocABSTRACT Historically, a vertebrate‐centric paradigm has framed our interpretation of molluscan endocrinology, with considerable research focusing on vertebrate‐type steroid hormones (e.g. oestrogens, testosterone). However, contradictory evidence on the occurrence of vertebrate‐type steroid hormones in molluscan tissues, and a lack of the specific ...
Panagiotidis K +3 more
europepmc +2 more sources
Palaeobiology and evolutionary context of Angulithes mermeti, a streamlined early Late Cretaceous shallow-water nautiloid [PDF]
Acta 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
GSL-Echinoidea-Holothuroidea-Cephalopoda
, 2022 A mini-poster of the principal echinoids, holothuroids, and cephalopods stars that may be expected on biodiversity surveys in Gulf of St. Lawrence (GSL).
Claude Nozeres (101073)
core +1 more source
Scientia Marina, 2012 The new information reported in this paper is based on 11 specimens of the large-tuberculate octopus Graneledone macrotyla. These specimens were caught in bottom trawl surveys ATLANTIS 2009 and 2010 carried out on the Patagonian slope off the Argentinean
Ángel Guerra +4 more
doaj +1 more source
Український антарктичний журнал, 2019 Оbjective. The study of diet of keystone-species vertebrates (Nothotenia coriiceps, Phalacrocorax bransfieldensis, Leptonychotes weddellii) in the ecosystem of the Argentine Islands Archipelago. Methods.
І. Dykyy, I. Zahorodnyi
doaj +1 more source