Cephalopod Evolution in Action—The Morphometric Differences of Metacoceras and its Descendant Tainoceras (Hyatt, 1883)
The coiled cephalopod Tainoceras (Hyatt, 1883) has eluded me for years. They are missing due to a good cause; the rocks I pull specimens from are too old to have them. Most coiled cephalopods I pull out of the rocks are Metacoceras (Hyatt, 1883), which compete with Pseudorthoceras (Girty, 1911)Read More →