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A New Eocene Casquehead Lizard (Reptilia, Corytophanidae) from North America.

Conrad JL - PLoS ONE (2015)

Bottom Line: A new fossil showing affinities with extant Laemanctus offers the first clear evidence for a casquehead lizard (Corytophanidae) from the Eocene of North America.Along with Geiseltaliellus from roughly coeval rocks in central Europe, the new find further documents the tropical fauna present during greenhouse conditions in the northern mid-latitudes approximately 50 million years ago (Ma).Modern Corytophanidae is a neotropical clade of iguanian lizards ranging from southern Mexico to northern South America.

View Article: PubMed Central - PubMed

Affiliation: Department of Anatomy, NYIT College of Osteopathic Medicine, Northern Boulevard, Old Westbury, NY, 11568, United States of America; Department of Vertebrate Paleontology, American Museum of Natural History, Central Park West at 79th Street, New York, NY, 10024, United States of America.

ABSTRACT
A new fossil showing affinities with extant Laemanctus offers the first clear evidence for a casquehead lizard (Corytophanidae) from the Eocene of North America. Along with Geiseltaliellus from roughly coeval rocks in central Europe, the new find further documents the tropical fauna present during greenhouse conditions in the northern mid-latitudes approximately 50 million years ago (Ma). Modern Corytophanidae is a neotropical clade of iguanian lizards ranging from southern Mexico to northern South America.

No MeSH data available.


Holotype (UWBM 89090) specimen for Babibasiliscus alxi nov. taxon.Photographs in (A) right lateral, (B) dorsal, and (C) ventral views. Digital reconstructions derived from HRXCT in (D) left lateral view and (E) transverse section. The vertical red line in (D) indicates the plane of section in (E).
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pone.0127900.g001: Holotype (UWBM 89090) specimen for Babibasiliscus alxi nov. taxon.Photographs in (A) right lateral, (B) dorsal, and (C) ventral views. Digital reconstructions derived from HRXCT in (D) left lateral view and (E) transverse section. The vertical red line in (D) indicates the plane of section in (E).

Mentions: A new fossil corytophanid from the Bridger Formation (Fig 1) represents the sister-taxon to extant Laemanctus (Fig 2). Although modern corytophanids are restricted to Central and South America (Fig 2A and 2B), I posit that the group had a Euramerican/Laurasian origin and became restricted to lower latitudes after post-Eocene global cooling.


A New Eocene Casquehead Lizard (Reptilia, Corytophanidae) from North America.

Conrad JL - PLoS ONE (2015)

Holotype (UWBM 89090) specimen for Babibasiliscus alxi nov. taxon.Photographs in (A) right lateral, (B) dorsal, and (C) ventral views. Digital reconstructions derived from HRXCT in (D) left lateral view and (E) transverse section. The vertical red line in (D) indicates the plane of section in (E).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4489568&req=5

pone.0127900.g001: Holotype (UWBM 89090) specimen for Babibasiliscus alxi nov. taxon.Photographs in (A) right lateral, (B) dorsal, and (C) ventral views. Digital reconstructions derived from HRXCT in (D) left lateral view and (E) transverse section. The vertical red line in (D) indicates the plane of section in (E).
Mentions: A new fossil corytophanid from the Bridger Formation (Fig 1) represents the sister-taxon to extant Laemanctus (Fig 2). Although modern corytophanids are restricted to Central and South America (Fig 2A and 2B), I posit that the group had a Euramerican/Laurasian origin and became restricted to lower latitudes after post-Eocene global cooling.

Bottom Line: A new fossil showing affinities with extant Laemanctus offers the first clear evidence for a casquehead lizard (Corytophanidae) from the Eocene of North America.Along with Geiseltaliellus from roughly coeval rocks in central Europe, the new find further documents the tropical fauna present during greenhouse conditions in the northern mid-latitudes approximately 50 million years ago (Ma).Modern Corytophanidae is a neotropical clade of iguanian lizards ranging from southern Mexico to northern South America.

View Article: PubMed Central - PubMed

Affiliation: Department of Anatomy, NYIT College of Osteopathic Medicine, Northern Boulevard, Old Westbury, NY, 11568, United States of America; Department of Vertebrate Paleontology, American Museum of Natural History, Central Park West at 79th Street, New York, NY, 10024, United States of America.

ABSTRACT
A new fossil showing affinities with extant Laemanctus offers the first clear evidence for a casquehead lizard (Corytophanidae) from the Eocene of North America. Along with Geiseltaliellus from roughly coeval rocks in central Europe, the new find further documents the tropical fauna present during greenhouse conditions in the northern mid-latitudes approximately 50 million years ago (Ma). Modern Corytophanidae is a neotropical clade of iguanian lizards ranging from southern Mexico to northern South America.

No MeSH data available.