First teuthid cephalopod from the Lower Jurassic of South America (Neuquén Basin, Argentina) [PDF]
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
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O enigma da "reação espermatofórica": breve síntese do conhecimento sobre a estrutura e o funcionamento dos espermatóforos dos cefalópodes (Mollusca: Cephalopoda) [PDF]
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
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First record of non-mineralized cephalopod jaws and arm hooks from the latest Cretaceous of Eurytania, Greece [PDF]
Swiss Journal of Palaeontology, 2020 Due to the lower fossilization potential of chitin, non-mineralized cephalopod jaws and arm hooks are much more rarely preserved as fossils than the calcitic lower jaws of ammonites or the calcitized jaw apparatuses of nautilids. Here, we report such non-
Christian Klug +3 more
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Phylogeny and systematics of the Coleoidea [PDF]
Paleontological Contributions: New Series (1992-2009), 1994 15 p., 4 fig.
Doyle, P., Donovan, D. T., Nixon, M.
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Orthoceratoid and coleoid cephalopods from the Middle Triassic of Switzerland with an updated taxonomic framework for Triassic Orthoceratoidea [PDF]
Swiss Journal of PalaeontologyOrthoconic cephalopods are subordinate, but persistent, widespread and regionally abundant components of Triassic marine ecosystems. Here, we describe unpublished specimens from the Anisian (Middle Triassic) Besano Formation at Monte San Giorgio ...
Alexander Pohle, Christian Klug
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The Continuing Debate on Deep Molluscan Phylogeny: Evidence for Serialia (Mollusca, Monoplacophora + Polyplacophora) [PDF]
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 +5 more sources
Anatomy and evolution of the first Coleoidea in the Carboniferous. [PDF]
Commun Biol, 2019 AbstractColeoidea (squids and octopuses) comprise all crown group cephalopods except the Nautilida. Coleoids are characterized by internal shell (endocochleate), ink sac and arm hooks, while nautilids lack an ink sac, arm hooks, suckers, and have an external conch (ectocochleate).
Klug C +7 more
europepmc +6 more sources
Pterosaurs ate soft-bodied cephalopods (Coleoidea). [PDF]
Sci Rep, 2020 AbstractDirect evidence of successful or failed predation is rare in the fossil record but essential for reconstructing extinct food webs. Here, we report the first evidence of a failed predation attempt by a pterosaur on a soft-bodied coleoid cephalopod.
Hoffmann R +5 more
europepmc +6 more sources
Triassic coleoid beaks and other structures from the Calcareous Alps revisited [PDF]
Acta Palaeontologica Polonica, 2022 We performed comprehensive study of seven Carnian, Late Triassic specimens of a coleoid cephalopod Phragmoteuthis bisinuata, on which Suess based his hypothesis on “beaks of P. bisinuata”. Using SEM/EDS, we found that “beaks of P.
LARISA A. DOGUZHAEVA +4 more
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Evolution of the Cdk4/6-Cdkn2 system in invertebrates. [PDF]
Genes CellsHypothesis on the evolution of the Cdkn2 locus. (a) Loss of Cdkn2 occurred multiple times. (b) Evolution of microsynteny at the Cdkn2 locus. Cdkn2e is a hypothetical transient gene. Abstract The cell cycle is driven by cyclin‐dependent kinases (Cdks). The decision whether the cell cycle proceeds is made during G1 phase, when Cdk4/6 functions.
Yuki S +5 more
europepmc +2 more sources