Anchura, is a genus of extinct marine gastropods (snails) found as fossils only in marine deposits of Cretaceous age (between 145.5 million and 65.5 million years old). It is thus a useful guide or index fossil because it is easily recognizable. The shell whorls are globular and ornamented with raised crenulations; the spire is sharply pointed; the body whorl, the final and largest whorl, has a prominently extended outer lip. Paleontologist studying Anchura have defined different species. Which species concept was used?
Answers: 3
Geography, 22.06.2019 21:00, blessing03
When you cross a time zone going east what happens to the time
Answers: 1
Geography, 23.06.2019 00:30, dorindaramirez0531
In the following diagram, four different index fossils are labeled: which of the labeled fossils comes from the oldest organism? a b c d
Answers: 1
Anchura, is a genus of extinct marine gastropods (snails) found as fossils only in marine deposits o...
Physics, 25.01.2021 20:50
Chemistry, 25.01.2021 20:50
Arts, 25.01.2021 20:50