World Library  
Flag as Inappropriate
Email this Article


Article Id: WHEBN0017980209
Reproduction Date:

Title: Steneosaurus  
Author: World Heritage Encyclopedia
Language: English
Subject: List of marine reptiles, Holzmaden, Tithonian, Toarcian, Aalenian, Bajocian, Bathonian, Berriasian, Callovian, Oxfordian (stage)
Publisher: World Heritage Encyclopedia


Temporal range: 183–142Ma
Toarcian - Berriasian
Steneosaurus bollensis, Holzmaden Germany
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Sauropsida
Infraclass: Archosauromorpha
(unranked): Mesoeucrocodylia
Suborder: Thalattosuchia
Family: Teleosauridae
Genus: Steneosaurus
Geoffroy, 1825
  • S. baroni
  • S. bollensis
  • S. boutilieri
  • S. brevior
  • S. edwardsi
  • S. gracilirostris
  • S. heberti
  • S. jugleri
  • S. larteti
  • S. leedsi
  • S. megarhinus
  • S. megistorhynchus (type)
  • S. obtusidens
  • S. priscus

Steneosaurus is an extinct genus of teleosaurid crocodyliform from the Early Jurassic to Early Cretaceous (Toarcian to Berriasian). Fossil specimens have been found in England, France, Germany, Switzerland and Morocco. The largest species, S. heberti, reached up to 5 m (16.5 ft) long, though 2.5-3.5 m was far more common.[2]


Species in this genus are traditionally classed into two skull groups: longirostrine (long, narrow jaws) and brevirostrine (short, broad jaws).


  • S. baroni: Madagascar from the Bathonian.
  • S. bollensis: Western Europe (England, France and Germany) from the Toarcian.
  • S. boutilieri: Western Europe (England, France and Switzerland) from the Bathonian.
  • S. gracilirostris: Western Europe (England) from the Toarcian.
  • S. heberti: Western Europe (France) from the Callovian and Oxfordian.
  • S. jugleri: Western Europe (Germany and Switzerland) from the late Kimmeridgian and early Tithonian. Was originally the type species of the genus Sericodon
  • S. larteti: Western Europe (England and France) from the Bathonian.
  • S. leedsi: Western Europe (England and France) from the Callovian.
  • S. megarhinus: Western Europe (England) from the late Kimmeridgian.
  • S. megistorhynchus: (type) Western Europe (France) from the Bathonian.
  • S. priscus: Western Europe (Germany) from the early Tithonian. Also is the type species of the genus Aeolodon.


  • S. brevior: Western Europe (England) from the Toarcian.
  • S. edwardsi: Western Europe (England and France) from the Callovian and Oxfordian.
  • S. obtusidens: Western Europe (England) from the Callovian.

Evolutionary relationships

A recent phylogenetic analysis into the evolutionary relationships of Thalattosuchia did not support the monophyly of Steneosaurus, as the genera Machimosaurus and Teleosaurus both fell within Steneosaurus.[3]

Niche partitioning

Steneosaurus priscus is one of five thalattosuchian species known from the Mörnsheim Formation (Solnhofen limestone, early Tithonian) of Bavaria, Germany. Steneosaurus was the only teleosaurid known from this Formation, co-existing with four metriorhynchid species from the genera Dakosaurus and Geosaurus. It has been hypothesised that niche partitioning enabled several species of crocodyliforms to co-exist.[4]

From the semi-aquatic Oker locality in Lower Saxony, Germany (Kimmeridgian-age) two genera of teleosaurids (Steneosaurus and Machimosaurus) are known, in addition to the neosuchian genera Goniopholis and Theriosuchus.[5] Steneosaurus and Machimosaurus are also found together in the same Tithonian-age deposits of western France.[6]

See also

Paleontology portal

External links

  • Angellis Net pdf


This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.

Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.