dcsimg

Morphology

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Other Physical Features: ectothermic ; bilateral symmetry

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bibliographic citation
Ast, J. 2003. "Sphenodontidae" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Sphenodontidae.html
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Jennifer C. Ast
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Reproduction

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Key Reproductive Features: gonochoric/gonochoristic/dioecious (sexes separate)

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The Regents of the University of Michigan and its licensors
bibliographic citation
Ast, J. 2003. "Sphenodontidae" (On-line), Animal Diversity Web. Accessed April 27, 2013 at http://animaldiversity.ummz.umich.edu/site/accounts/information/Sphenodontidae.html
author
Jennifer C. Ast
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Animal Diversity Web

Sphenodontidae

provided by wikipedia EN

Sphenodontidae is a family within the reptile group Rhynchocephalia, comprising taxa most closely related to the living tuatara of the genus Sphenodon. The included taxa within Sphenodontidae have varied greatly between analyses, and the group has lacked a formal definition. Cynosphenodon from the Early Jurassic of Mexico has consistently been recovered as a close relative of the tuatara in most analyses.[2]

The following is a cladogram of Rhynchocephalia after Rauhut et al. (2012):[3]

Sphenodontidae

Sphenodon (Tuatara)

     

Oenosaurus

     

Cynosphenodon

   

Zapatadon

       

References

  1. ^ Apesteguia RO, Rougier GW (2012). "A basal sphenodontian (Lepidosauria) from the Jurassic of Patagonia: new insights on the phylogeny and biogeography of Gondwanan rhynchocephalians". Zoological Journal of the Linnean Society. 166 (2): 342–360. doi:10.1111/j.1096-3642.2012.00837.x. [R. Benson/R. Benson]
  2. ^ Simões TR, Caldwell MW, Pierce SE (December 2020). "Sphenodontian phylogeny and the impact of model choice in Bayesian morphological clock estimates of divergence times and evolutionary rates". BMC Biology. 18 (1): 191. doi:10.1186/s12915-020-00901-5. PMC 7720557. PMID 33287835.
  3. ^ Rauhut OW, Heyng AM, López-Arbarello A, Hecker A (2012). "A new rhynchocephalian from the late jurassic of Germany with a dentition that is unique amongst tetrapods". PLOS ONE. 7 (10): e46839. Bibcode:2012PLoSO...746839R. doi:10.1371/journal.pone.0046839. PMC 3485277. PMID 23118861.
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