|
Menefeeceratops Size Comparison
''Menefeeceratops'' (meaning "Menefee Formation horned face") is a genus of ceratopsid dinosaur from the Menefee Formation in New Mexico, United States. It is potentially the oldest known member of the ceratopsids, as well as the centrosaurine subfamily, related to animals including '' Yehuecauhceratops'' and '' Crittendenceratops''. The type and only species is ''Menefeeceratops sealeyi,'' known from a partial, non-articulated skeleton. Discovery and naming The holotype, NMMNH P-25052, of ''Menefeeceratops'' was discovered by Paul Sealey in 1996 and later mentioned in a paper in 1997,. but was not given a name until it was revisited in 2021 by Sebastian Dalman, Peter Dodson, and colleagues. The holotype was collected at the NMMNH locality 3033 in Sandoval County, New Mexico, USA, whose rocks came from the early Campanian rocks of the Allison Member of the Menefee Formation. The holotype was later collected by the New Mexico Museum of Natural History with permission of the B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Campanian
The Campanian is the fifth of six ages of the Late Cretaceous Epoch on the geologic timescale of the International Commission on Stratigraphy (ICS). In chronostratigraphy, it is the fifth of six stages in the Upper Cretaceous Series. Campanian spans the time from 83.6 (± 0.2) to 72.1 (± 0.2) million years ago. It is preceded by the Santonian and it is followed by the Maastrichtian. The Campanian was an age when a worldwide sea level rise covered many coastal areas. The morphology of some of these areas has been preserved: it is an unconformity beneath a cover of marine sedimentary rocks. Etymology The Campanian was introduced in scientific literature by Henri Coquand in 1857. It is named after the French village of Champagne in the department of Charente-Maritime. The original type locality was a series of outcrop near the village of Aubeterre-sur-Dronne in the same region. Definition The base of the Campanian Stage is defined as a place in the stratigraphic column wher ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
