Echinoderm microfossil dating
We confirm the traditional paleontological view that ophiuroids are sister to the asteroids and date the crown group Ophiuroidea to the mid-Permian (270 ± 30 mega-annum).
The abundance and wide distribution of modern and disarticulated fossil Ophiuroidea , including brittle stars and basket stars, make them an ideal model system for global marine biogeography if we have the phylogenetic framework necessary to link extant and fossil morphology in an evolutionary context.
To provide access without cookies would require the site to create a new session for every page you visit, which slows the system down to an unacceptable level.
I posted to several lists asking if anyone had the collection with the names.
Several people from Wards responded, and within 24 hours I had a pdf of the list! Click here for a great description of collecting microfossils.
Search for echinoderm microfossil dating:
This site stores nothing other than an automatically generated session ID in the cookie; no other information is captured.