Skip to main content
×
×
Home

The Cretaceous marine squamate Mesoleptos and the origin of snakes

  • MICHAEL S.Y. LEE (a1) and JOHN D. SCANLON (a2)
Abstract

The poorly known marine squamate Mesoleptos is reassessed based on two previously known specimens and a newly referred specimen. The three specimens of Mesoleptos zendrinii share unique characters such as long, posteriorly tapering centra and distally straight but non-pachyostotic ribs. Mesoleptos had a narrow neck (and presumably small head), long laterally compressed body, and small fore- and hindlimbs. Phylogenetic analysis suggests that Mesoleptos is the nearest relative of snakes; this phylogenetic position is consistent with its morphology being intermediate between typical marine squamates (e.g. mosasauroids) and primitive marine snakes (pachyophiids). However, this interpretation remains tentative because Mesoleptos is very poorly known, and many of the characters uniting it with mosasauroids and primitive snakes are correlates of marine habits and/or limb reduction.

Copyright
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Bulletin of the Natural History Museum: Zoology Series
  • ISSN: 0968-0470
  • EISSN: 1475-2980
  • URL: /core/journals/bulletin-of-the-natural-history-museum-zoology-series
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed