How old is Cystiphyllum?
Join Britannica’s Publishing Partner Program and our community of experts to gain a global audience for your work! Cystiphyllum, extinct genus of solitary corals found as fossils in Silurian and Devonian marine rocks (the Silurian Period preceded the Devonian Period and ended 416 million years ago).
What organism group is Cystiphyllum in?
Cystiphyllum Lonsdale, 1839
| Organism group | Biota |
|---|---|
| Phylum | Cnidaria |
| Class | Anthozoa |
| Subclass | Rugosa |
| Order | Cystiphyllida |
Where are Silurian fossils found?
Well-preserved fossils from Silurian reefs can be found in the Great Lake States of Minnesota, Wisconsin, Michigan, and Illinois. Silurian rocks can also be found exposed in the Appalachian Mountains, in several provinces of Canada, and in northern Mexico.
What is fossil study?
The study of fossils is called paleontology, from the Greek meaning ‘ancient (paleo-) being (onto-) study (-logy)’. Scientists who study fossils are called paleontologists.
What fossil group does Hexameroceras belong to?
Hexameroceras is a genus of nautiloid cephalopods belonging to the order Oncocerida that lived during the middle and late Silurian. Its fossils have been found in North America in Indiana, New York, Ohio, and Wisconsin, and in Europe in the Czech Republic.
When did Bathyurus Extans first appear?
Bathyurus extans ✝
| Source Data | Source ID Link Global Biodiversity Information Facility ID (GBIF) 8687925 https://www.gbif.org/species/8687925 PaleoBioDB ID (PBDB) 177414 https://paleobiodb.org/classic/checkTaxonInfo?taxon_no=177414 |
|---|---|
| Status (PBDB) | extinct |
| Taxon Size (PBDB) | 2 |
| First Recorded Appearance | 472 – 458 Ma Ordovician |
What are Silurian fossils?
Silurian Fossils (440 to 410 mya) fossil are found. Perhaps most important is the appearance of vascular plants, particularly Cooksonia and Lycophites. The Silurian witnessed substantial evolution of fishes. The first jawed fished appeared and jawless fishes dispersed widely.
What plants lived during the Silurian period?
Bryophytes such moss, hornworts and liverworts first appeared in the late Ordovician. The first known plant to have an upright stalk, and vascular tissue for water transport, was the Cooksonia of the mid-Silurian deltas. This little plant was a few centimeters high with a branched structure with small bulbous tips.
How old is the Hexameroceras?
What period did Nerinea Trinodosa live in?
List of index fossils
| Scientific Name | Geological time interval | Million Years Ago |
|---|---|---|
| Scaphites hippocrepis | Cretaceous | 145 to 66 million years ago |
| Inoceramus labiatus | Cretaceous | |
| Perisphinctes tiziani | Jurassic | 201.3 to 145 million years ago |
| Nerinea trinodosa | Jurassic |