Cylindroteuthis
Template:Short description Template:Italic title Template:Taxobox/core
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.[1] A belemnite originally described as the Cylindroteuthis species C. confessa has been re-described as Mesoteuthis soloniensis.[2]
Paleobiology
Cylindroteuthis is a common find from several Jurassic formations. Specimen length ranges from Script error: No such module "convert".. 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.[3]
Distribution
Cylindroteuthis has been recovered from the Temaikan Boatlanding Bay formation of Australasia.[4] Three species of Cylindroteuthis (C. knoxvillensis, C. cf. newvillensis, and C. venusta) have been described from the Arctic region.[5] 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.[6] The findings also suggest the existence of a "proto Gulf-stream" as early as the Valanginian.[6] Another species, C. cf. obeliscoides is associated with the early Cretaceous One Tree Formation of Vancouver Island.[7]
Species List:
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
<templatestyles src="Reflist/styles.css" />
- ↑ Cite error: Script error: No such module "Namespace detect".Script error: No such module "Namespace detect".
- ↑ Script error: No such module "Citation/CS1".
- ↑ Cite error: Script error: No such module "Namespace detect".Script error: No such module "Namespace detect".
- ↑ Script error: No such module "citation/CS1".
- ↑ Script error: No such module "Citation/CS1".
- ↑ a b Script error: No such module "Citation/CS1".
- ↑ Ludvigsen, Rolf & Beard, Graham. 1997. West Coast Fossils: A Guide to the Ancient Life of Vancouver Island. pg. 93-94
Script error: No such module "Check for unknown parameters".
- Fossils (Smithsonian Handbooks) by David Ward (Page 163)
External links
- Pages with script errors
- Pages with reference errors
- 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