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| type_species_authority = Jenkins and Walsh, 1993
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'''''Eocaecilia''''' is an [[extinction|extinct]] [[genus]] of [[caecilian]] (limbless amphibian) from the Early Jurassic Period in [[Arizona]], [[USA]].<ref name=lisanfos>{{cite web |url=http://www.lisanfos.mncn.csic.es/?module=taxon&id=294&lang=en |title=Eocaecilia |author=Martín, C. & Sanchiz, B. |year=2014 |work=Lisanfos KMS. Version 1.2. Online reference accessible at http://www.lisanfos.mncn.csic.es/ |publisher=Museo Nacional de Ciencias Naturales, MNCN-CSIC, Madrid (Spain) |accessdate=13 January 2014}}</ref> One species is described, '''''Eocaecilia micropodia'''''.<ref>{{cite web |url=http://www.lisanfos.mncn.csic.es/?module=taxon&id=1106&lang=en |title=Eocaecilia micropodia |author=Martín, C. & Sanchiz, B. |year=2014 |work=Lisanfos KMS. Version 1.2. Online reference accessible at http://www.lisanfos.mncn.csic.es/ |publisher=Museo Nacional de Ciencias Naturales, MNCN-CSIC, Madrid (Spain) |accessdate=13 January 2014}}</ref>
'''''Eocaecilia''''' is an [[extinction|extinct]] [[genus]] of [[caecilian]] (limbless amphibian) from the early Jurassic [[Kayenta Formation]] of [[Arizona]], [[USA]]. One species is described, '''''Eocaecilia micropodia'''''.
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[[File:Eocaecilia BW.jpg|thumb|left|Restoration]]


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[[File:Eocaecilia BW.jpg|thumb|left|Life restoration]]
''Eocaecilia'' shared some characteristics with [[salamander]]s and the now extinct ''[[Microsauria]]''. It was of small size, about 15&nbsp;cm in length. Unlike modern caecilians, which are legless, ''Eocaecilia'' possessed small legs, and while modern caecilians have poorly developed [[eye]]s and spend a lot of time under ground, ''Eocaecilia'''s eyes were somewhat better well-developed. Although the precise ancestry of ''Eocaecilia'' is debated (and other caecilians by extension), it likely resided among the ancestral [[lepospondyl]]<ref>Jenkins, F.A. & Walsh, D.M. (1993) An Early Jurassic caecilian with limbs. Nature 365: 246-250.</ref><ref>Huttenlocker, A. K.; Pardo, J. D.; Small, B. J.; Anderson, J. S. (2013). "Cranial morphology of recumbirostrans (Lepospondyli) from the Permian of Kansas and Nebraska, and early morphological evolution inferred by micro-computed tomography". Journal of Vertebrate Paleontology 33 (3): 540. doi:10.1080/02724634.2013.728998</ref><ref>Anderson, J. S.; Reisz, R. R.; Scott, D.; Fröbisch, N. B.; Sumida, S. S. (2008). "A stem batrachian from the Early Permian of Texas and the origin of frogs and salamanders". Nature 453 (7194): 515–518. doi:10.1038/nature06865</ref> or [[temnospondyl]]<ref>Jenkins, F.A. ''et al.'' (2007) [http://www.bioone.org/doi/abs/10.3099/0027-4100(2007)158%5B285:AOEMAL%5D2.0.CO%3B2 Anatomy of ''Eocaecilia micropodia'', A Limbed Caecilian of the Early Jurassic]. ''Bulletin of the Museum of Comparative Zoology'' 158(6):285-365.</ref><ref>Maddin H.C., Jenkins F.A. Jr. & Anderson J.S. (2012) [http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0050743 The Braincase of ''Eocaecilia micropodia'' (Lissamphibia, Gymnophiona) and the Origin of Caecilians]. ''PLoS ONE'' 7(12):e50743.</ref> amphibians of the Paleozoic and Mesozoic.
''Eocaecilia'' shared some characteristics with [[salamander]]s and the now extinct ''[[Microsauria]]''. It was of small size, about 15&nbsp;cm in length. Unlike modern caecilians, which are legless, ''Eocaecilia'' possessed small legs, and while modern caecilians have poorly developed [[eye]]s and spend a lot of time under ground, ''Eocaecilia'''s eyes were somewhat better well-developed. Although the precise ancestry of ''Eocaecilia'' is debated (and other caecilians by extension), it likely resided among the ancestral [[lepospondyl]]<ref>Jenkins, F.A. & Walsh, D.M. (1993) An Early Jurassic caecilian with limbs. Nature 365: 246-250.</ref><ref>Huttenlocker, A. K.; Pardo, J. D.; Small, B. J.; Anderson, J. S. (2013). "Cranial morphology of recumbirostrans (Lepospondyli) from the Permian of Kansas and Nebraska, and early morphological evolution inferred by micro-computed tomography". Journal of Vertebrate Paleontology 33 (3): 540. doi:10.1080/02724634.2013.728998</ref><ref>Anderson, J. S.; Reisz, R. R.; Scott, D.; Fröbisch, N. B.; Sumida, S. S. (2008). "A stem batrachian from the Early Permian of Texas and the origin of frogs and salamanders". Nature 453 (7194): 515–518. doi:10.1038/nature06865</ref> or [[temnospondyl]]<ref>Jenkins, F.A. ''et al.'' (2007) [http://www.bioone.org/doi/abs/10.3099/0027-4100(2007)158%5B285:AOEMAL%5D2.0.CO%3B2 Anatomy of ''Eocaecilia micropodia'', A Limbed Caecilian of the Early Jurassic]. ''Bulletin of the Museum of Comparative Zoology'' 158(6):285-365.</ref><ref>Maddin H.C., Jenkins F.A. Jr. & Anderson J.S. (2012) [http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0050743 The Braincase of ''Eocaecilia micropodia'' (Lissamphibia, Gymnophiona) and the Origin of Caecilians]. ''PLoS ONE'' 7(12):e50743.</ref> amphibians of the Paleozoic and Mesozoic.


Revision as of 12:07, 16 August 2015

Eocaecilia
Temporal range: Early Jurassic, 199.6–175.6 Ma
3D scan of the holotype skull
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Amphibia
Order: Gymnophiona
Genus: †Eocaecilia
Jenkins and Walsh, 1993
Type species
†Eocaecilia micropodia
Jenkins and Walsh, 1993

Eocaecilia is an extinct genus of caecilian (limbless amphibian) from the early Jurassic Kayenta Formation of Arizona, USA. One species is described, Eocaecilia micropodia.

Life restoration

Eocaecilia shared some characteristics with salamanders and the now extinct Microsauria. It was of small size, about 15 cm in length. Unlike modern caecilians, which are legless, Eocaecilia possessed small legs, and while modern caecilians have poorly developed eyes and spend a lot of time under ground, Eocaecilia's eyes were somewhat better well-developed. Although the precise ancestry of Eocaecilia is debated (and other caecilians by extension), it likely resided among the ancestral lepospondyl[1][2][3] or temnospondyl[4][5] amphibians of the Paleozoic and Mesozoic.

References

  1. ^ Jenkins, F.A. & Walsh, D.M. (1993) An Early Jurassic caecilian with limbs. Nature 365: 246-250.
  2. ^ Huttenlocker, A. K.; Pardo, J. D.; Small, B. J.; Anderson, J. S. (2013). "Cranial morphology of recumbirostrans (Lepospondyli) from the Permian of Kansas and Nebraska, and early morphological evolution inferred by micro-computed tomography". Journal of Vertebrate Paleontology 33 (3): 540. doi:10.1080/02724634.2013.728998
  3. ^ Anderson, J. S.; Reisz, R. R.; Scott, D.; Fröbisch, N. B.; Sumida, S. S. (2008). "A stem batrachian from the Early Permian of Texas and the origin of frogs and salamanders". Nature 453 (7194): 515–518. doi:10.1038/nature06865
  4. ^ Jenkins, F.A. et al. (2007) Anatomy of Eocaecilia micropodia, A Limbed Caecilian of the Early Jurassic. Bulletin of the Museum of Comparative Zoology 158(6):285-365.
  5. ^ Maddin H.C., Jenkins F.A. Jr. & Anderson J.S. (2012) The Braincase of Eocaecilia micropodia (Lissamphibia, Gymnophiona) and the Origin of Caecilians. PLoS ONE 7(12):e50743.
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