Cylindroteuthis

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title: "Cylindroteuthis" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["belemnites", "jurassic-cephalopods", "cretaceous-cephalopods", "prehistoric-cephalopod-genera", "fossil-taxa-described-in-1879", "mesozoic-cephalopods-of-asia", "mesozoic-cephalopods-of-north-america", "cretaceous-cephalopods-of-europe", "mesozoic-cephalopods-of-europe", "early-jurassic-genus-first-appearances", "early-cretaceous-genus-extinctions"] description: "Genus of molluscs" topic_path: "general/belemnites" source: "https://en.wikipedia.org/wiki/Cylindroteuthis" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

::summary Genus of molluscs ::

| image_caption = Guard of C. puzosi, University of Michigan Museum of Natural History | regnum = Animalia | phylum = Mollusca | classis = Cephalopoda | unranked_ordo = Belemnoidea | ordo = †Belemnitida | genus = †Cylindroteuthis | genus_authority = Bayle, 1879 | synonyms = *Cylindroteuthis puzosiana - synonym of C. puzosi | subdivision_ranks = Species | subdivision = See Species List

Cylindroteuthis is a genus of belemnite that lived from the Early Jurassic to the Early Cretaceous. Its fossils have been found in Asia, Europe, North America, and New Zealand.

Taxonomical history

Cylindroteuthis was first described in 1879 by Claude-Emile Bayle. A belemnite originally described as the Cylindroteuthis species C. confessa has been re-described as Mesoteuthis soloniensis.

Paleobiology

Cylindroteuthis is a common find from several Jurassic formations. Specimen length ranges from 4 to. The most commonly preserved part of the animal is its guard, or rostrum, which was composed of calcite. The guard would not have been found on the exterior of Cylindroteuthis, as traces of blood vessels have been discovered on some guards, suggesting that it was an internal feature. The guard housed a phragmocone, which allowed Cylindroteuthis to maintain buoyancy in water. Some better-preserved specimens have features similar to modern squid, such as ten arm-like appendages and an ink sac, intact.

Distribution

Cylindroteuthis has been recovered from the Temaikan Boatlanding Bay formation of Australasia. Three species of Cylindroteuthis (C. knoxvillensis, C. cf. newvillensis, and C. venusta) have been described from the Arctic region. In addition, about 2350 belemnite guards (including those of Cylindroteuthis) have been recovered from Lower Cretaceous formations of northeastern Greenland, suggesting the presence of a sort of "immigration route" for belemnites. The findings also suggest the existence of a "proto Gulf-stream" as early as the Valanginian. Another species, C. cf. obeliscoides is associated with the early Cretaceous One Tree Formation of Vancouver Island.

Species

The genus contains thirteen species

• Cylindroteuthis clavicula
• Cylindroteuthis cuspidata
• Cylindroteuthis gelida
• Cylindroteuthis glennensis
• Cylindroteuthis jacutica
• Cylindroteuthis knoxvillensis
• Cylindroteuthis newvillensis
• Cylindroteuthis occidentalis
• Cylindroteuthis oweni
• Cylindroteuthis porrecta
• Cylindroteuthis porrectiformis
• Cylindroteuthis puzosi
• Cylindroteuthis venusta

References

• Fossils (Smithsonian Handbooks) by David Ward (Page 163)

References

1. Palmer, Douglas. (2009). "Prehistoric Life: The Definitive Visual History of Life on Earth". [[Dorling Kindersley]].
2. Scudder, Samuel Hubbard. (1882). "Nomenclator zoologicus: An alphabetical list of all generic names that have been employed by naturalists for recent and fossil animals from the earliest times to the close of the year 1879". Government printing office.
3. Dzyuba, O. S.. (May 2011). "New species of Early Bajocian Megateuthididae (Belemnitida) from the Pacific coast of Russia". [[Paleontological Journal]].
4. Westermann, Gerd E. G.. (2005). "The Jurassic of the Circum-Pacific". [[Cambridge University Press]].
5. Dzyuba, O. S.. (February 2012). "Belemnites and biostratigraphy of the Jurassic-Cretaceous boundary deposits of northern East Siberia: New data on the Nordvik Peninsula". [[Stratigraphy and Geological Correlation]].
6. Alsen, Peter. (September 2009). "The Early Cretaceous of North-East Greenland: A crossroads of belemnite migration". [[Palaeogeography, Palaeoclimatology, Palaeoecology]].
7. Ludvigsen, Rolf & Beard, Graham. 1997. West Coast Fossils: A Guide to the Ancient Life of Vancouver Island. pg. 93-94

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