Results 31 to 40 of about 5,211 (214)

Global biodiversity of the genus Ommastrephes (Ommastrephidae: Cephalopoda): an allopatric cryptic species complex

open access: yesZoological Journal of the Linnean Society, 2020
Cryptic speciation among morphologically homogeneous species is a phenomenon increasingly reported in cosmopolitan marine invertebrates. This situation usually leads to the discovery of new species, each of which occupies a smaller fraction of the ...
F. Fernández-Álvarez   +8 more
semanticscholar   +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

New insights into the morphology, reproduction and distribution of the large-tuberculate octopus Graneledone macrotyla from the Patagonian slope

open access: yesScientia 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

Cephalopods in the diet of keystone-species animals in the region of the Argentine Islands Archipelago (West Antarctica)

open access: yesУкраїнський 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

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

open access: yesActa 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   +3 more
doaj   +1 more source

Behavioural aspects of the spotty bobtail squid Euprymna parva (Cephalopoda: Sepiolidae)

open access: yes, 2020
Bobtail squids (Sepiolidae, Cephalopoda) have recently been growing in popularity in scientific studies due to their symbiotic relationship with light producing bacteria and their corresponding light emitting organs. However, the overall knowledge on the
C. Drerup, A. Sykes, Gavan M. Cooke
semanticscholar   +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

Ontogeny, muscle scars, colour pattern and predation marks in a Silurian orthoceratid cephalopod [PDF]

open access: yesActa Palaeontologica Polonica
Muscle scars, embryonic shell, colour pattern and intraspecific variation are known together in a very limited numberof straight shelled cephalopods, leading to uncertainty in the classification of the subclass Orthoceratoidea.
Štěpán Manda, Vojtěch Turek
doaj   +1 more source

Tactical Tentacles: New Insights on the Processes of Sexual Selection Among the Cephalopoda

open access: yesFrontiers in Physiology, 2019
The cephalopods (Mollusca: Cephalopoda) are an exceptional class among the invertebrates, characterised by the advanced development of their conditional learning abilities, long-term memories, capacity for rapid colour change and extremely adaptable ...
P. Morse, C. Huffard
semanticscholar   +1 more source

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