Hallirhoidae
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| Hallirhoidae Temporal range: Cretaceous - Eocene
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| File:Hallirhoidae.jpg | |
| Various Cretaceous Hallirhoiids | |
| Scientific classification Edit this classification | |
| 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
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