Abstract
The extant irregular echinoidsEchinoneus cyclostomusLeske andBrissus unicolor(Leske) are reported from the middle Pleistocene of Barbados. The moderately robustE. cyclostomusis well-preserved, whileB. unicolor, which had a thin test in life, occurs as an internal mold. The holectypoidE. cyclostomus sensu latooccurs in fossiliferous deposits of Upper Oligocene to Pleistocene age in the Antillean region, showing remarkably little overall variation in test shape during this period. Similarly, gross morphological features of RecentB. unicolorare not dissimilar to those seen in some Caribbean species from the Paleogene, such asB.sp. cf.B. unicolorfrom the Middle Eocene of Jamaica. Superior fossil specimens will be required to determine if certain fossil species within these genera are valid. This analysis supports the observation that many taxa of the modern Antillean, shallow-water echinoid fauna have essentially persisted within the region since at least the Oligocene.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
