Results 41 to 50 of about 383 (157)
The shell structure and chamber production cycle of the cephalopod Spirula (Coleoidea, Decabrachia)
Marine 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
An Early Triassic gladius associated with soft tissue remains from Idaho, USA—a squid-like coleoid cephalopod at the onset of Mesozoic Era [PDF]
Acta 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
Relationship of Cephalopods Orders Based on Morphological Characters
Jurnal 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
Biological 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
Cautionary tales on the use of proxies to estimate body size and form of extinct animals. [PDF]
Ecol EvolReconstructing the body size and form of extinct animals is of vital importance to our understanding of macroevolution and palaeontology. This is often done using anatomical proxies where extinct species are known only from fragmentary remains. However, there are many limitations influencing the selection of proxy taxa that are frequently overlooked ...
Gayford JH +7 more
europepmc +2 more sources
Papéis Avulsos de Zoologia, 2011 Cefalópodes coleóides (lulas, sépias e polvos) produzem espermatóforos muito complexos que são transferidos à fêmea durante a cópula por meio do hectocótilo, um apêndice modificado nos machos.
José Eduardo Amoroso Rodriguez Marian
doaj +1 more source
First teuthid cephalopod from the Lower Jurassic of South America (Neuquén Basin, Argentina)
Geologica Acta, 2005 A new species of squid, Teudopsis jeletzkyi n. sp., is described from the Toarcian (Lower Jurassic) of the Los Molles Formation in Neuquen Province, central west Argentina. Fossil squids have thus far been unknown in the Mesozoic of South America.
A. C. (Alberto Carlos) Riccardi
doaj +1 more source
Ecology and Evolution, Volume 9, Issue 22, Page 12390-12407, November 2019., 2019 The mitogenomes of M. lauensis and M. verrilli show novel arrangements of mitochondrial genes. Comparisons of mitochondrial gene rearrangements, to some extent, are a useful tool for phylogenetic studies. Abstract Hydrothermal vents are considered as one of the most extremely harsh environments on the Earth.
Shao'e Sun, Zhongli Sha, Yanrong Wang
wiley +1 more source
BioMed Research International, Volume 2013, Issue 1, 2013., 2013 Molluscs are a diverse animal phylum with a formidable fossil record. Although there is little doubt about the monophyly of the eight extant classes, relationships between these groups are controversial. We analysed a comprehensive multilocus molecular data set for molluscs, the first to include multiple species from all classes, including five ...
I. Stöger +7 more
wiley +1 more source
First record of Duvalia ex. gr. lata (Cephalopoda, Coleoidea) from Mexico
, 2023 Se reporta por primera vez el belemnite Duvalia ex. gr. lata (Cephalopoda, Coleoidea) en México. El único ejemplar, un rostro bien preservado, ha sido descubierto en capas del Cretácico Temprano de la Sierra de Parras,en las cercanías de Viesca, en el ...
Stinnesbeck, Wolfgang +3 more
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