Related Overviews


More Like This

Show all results sharing this subject:

  • Earth Sciences and Geography


Show Summary Details

Quick Reference

1 An external, longitudinal ridge situated on the venter of an ammonoid (Ammonoidea).

2 In flying birds, a ridge projecting forward from the sternum and serving for the attachment of the enlarged pectoral muscles.

Subjects: Earth Sciences and Geography.

Reference entries

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.