| Hallirhoidae Temporal range: Cretaceous - Eocene | |
|---|---|
 | |
| Various Cretaceous Hallirhoiids | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Porifera |
| Class: | Demospongiae |
| Subclass: | Heteroscleromorpha |
| Family: | †Hallirhoidae |
| Genera | |
| |
Hallirhoidae is an extinct family of heteroscleromorph demosponges found throughout the world from the Cretaceous to the Eocene, whereupon they became extinct.[1] The highest concentration of species occurred in the Tethys Ocean during the upper Cretaceous. The hallirhoid demosponges were very distinctive-looking, largely pear-shaped sponges that were attached to the seafloor by a long stem-like stalk.[2][3]
References
- ↑ Carlton, Robert L. (2018-03-07). A Concise Dictionary of Paleontology. Springer. ISBN 9783319730554.
- ↑ "Callopegma en Phymatella, twee tetracladine krijtsponzen van Westerhaar en Sibculo". natuurtijdschriften.nl. Retrieved 2019-01-22.
- ↑ "Sponge". The Fossil Forum. Retrieved 2019-05-21.
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