On the fossil record of the Gekkota

Juan D. Daza, Aaron M. Bauer, Eric D. Snively

Research output: Contribution to journalArticle

33 Citations (Scopus)

Abstract

Gekkota is often interpreted as sister to all remaining squamates, exclusive of dibamids, or as sister to Autarchoglossa. It is the only diverse lineage of primarily nocturnal lizards and includes some of the smallest amniotes. The skeleton of geckos has often been interpreted as paedomorphic and/or "primitive" but these lizards also display a wide range of structural specializations of the postcranium, including modifications associated with both scansorial locomotion and limb reduction. Although the concept of "Gekkota" has been variously applied by different authors, we here apply a rigorous apomorphy based definition, recent advances in gekkotan morphology and phylogenetics, and diverse comparative material to provide a comprehensive assessment of 28 known pre-Quaternary geckos, updating the last such review, published three decades ago. Fossils evaluated include both sedimentary fossils and amber-embedded specimens. Known Cretaceous geckos are exclusively Asian and exhibit character combinations not seen in any living forms. Cenozoic gekkotans derive from sites around the world, although Europe is especially well represented. Paleogene geckos are largely known from disarticulated remains and show similarities to Sphaerodactylidae and Diplodactylidae, although resemblances may be plesiomorphic in some cases. Many Neogene gekkotans are referable to living families or even genera, but their geographic occurrences are often extralimital to those of modern groups, as is consistent with paleoclimatic conditions. The phylogenetic placement of fossil gekkotans has important repercusions for timetree calibration, but at present only a small number of fossils can be confidently assigned to even family level groupings, limiting their utility in this regard. Anat Rec, 297:433-462, 2014.

Original languageEnglish
Pages (from-to)433-462
Number of pages30
JournalAnatomical Record
Volume297
Issue number3
DOIs
StatePublished - 1 Mar 2014
Externally publishedYes

Fingerprint

Lizards
Gekkonidae
fossil record
fossils
fossil
lizard
lizards
phylogenetics
amber
phylogeny
Squamata
locomotion
limbs (animal)
Paleogene
skeleton
Amber
Neogene
limb
calibration
Locomotion

Keywords

  • Gekkonoidea
  • Paleontology
  • Phylogeny
  • Pygopodoidea
  • Timetree calibration

Cite this

Daza, Juan D. ; Bauer, Aaron M. ; Snively, Eric D. / On the fossil record of the Gekkota. In: Anatomical Record. 2014 ; Vol. 297, No. 3. pp. 433-462.
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On the fossil record of the Gekkota. / Daza, Juan D.; Bauer, Aaron M.; Snively, Eric D.

In: Anatomical Record, Vol. 297, No. 3, 01.03.2014, p. 433-462.

Research output: Contribution to journalArticle

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