Porifera - Digital Atlas of Ancient Life
Sponges make up the simplest animal group on the planet: phylum Porifera (from the Latin porus ‘pore’ and ferre ‘to bear’). Having no digestive tract, localized sensory region, or true tissues, …
fossil identification by shape - Earth Sci
Most commonly found fossils can usually be classified to their group by observing some simple shapes and features. If your fossil has one of the shapes below, look down the guide for that …
Fossil Sponges - U.S. National Park Service
Sponge fossils in national parks reveal important information about geologic history and the changing life in oceans through time. Sponges played a different ecological role in the …
This Sponge Fossil May Be the Earliest Record of Animal Life
2021年7月28日 · Since a microscopic maze of pale streaks is the only evidence for the earliest prehistoric sponge, a camp of skeptics disagrees with the fossils’ spongeous identity.
Demospongiae - Digital Atlas of Ancient Life
Demospongiae represents the dominant class of living sponges, representing more than 90% of all those alive today. Few demosponges have hard skeletons, leaving behind a sparse fossil …
Fossil sponge collections - Natural History Museum
The Museum has a substantial collection of fossil sponges that contains an estimated 71,000 specimens, including more than 200 type and figured specimens. The collection also contains …
Calcarea - Digital Atlas of Ancient Life
While the vast majority of ancient Calcarea inhabited shallow water throughout their fossil record, modern species have been found across all depths. Some recent Antarctic expeditions have …
It also has a strong practical focus as a tool for sponge identification: providing concise definitions, diagnoses, keys and illustrations of all the valid (i.e., reinterpreted) genera of...
Systema Porifera: A Guide to the Classification of Sponges
Systema Porifera is unique making sponge taxonomy widely available at the practical level of classification (genera, families, order). It is a taxonomic revision of sponges and …
Identification - flint, fossil sponge - Saffron Walden Museum
2020年5月1日 · Sponges are very simple animals which live on the sea floor. They still exist today, and the earliest known fossil sponges are 580 million years old. The silica fills the gaps …