Strigilodus is an extinct genus of cartilaginous fish within the order Petalodontiformes. This genus existed during the Lower Carboniferous period, approximately 350 million years ago.
| Strigilodus Temporal range: Lower Carboniferous
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| Speculative life restoration of S. tollesonae reconstructed after Janassa | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Holocephali |
| Order: | †Petalodontiformes |
| Genus: | †Strigilodus Hodnett, Toomey, Olson, Tweet & Santucci, 2023 |
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The genus was identified in 2023 from fossilized teeth found in the Ste. Genevieve Formation rock layer at Mammoth Cave National Park in Kentucky, the United States.[1] The distinctive teeth, arranged in a fan-like structure, featured a large tooth in the center and three smaller teeth alongside it. Each tooth had a rounded curved cusp for clipping and grasping hard shell prey, with ridges on the inner side for crushing.[2][3]
Species
editThe genus contains 1 known species:
- Strigilodus tollesonae (Hodnett, Toomey, Olson, Tweet & Santucci, 2023)
See also
editReferences
edit- ^ "New Species of Ancient Shark Identified Through Fossil Research at Mammoth Cave National Park – Mammoth Cave National Park (U.S. National Park Service)". www.nps.gov. October 11, 2023. Retrieved 2023-10-17.
- ^ Hodnett, John-Paul M.; Toomey, Rickard; Olson, Rickard; Tweet, Justin S.; Santucci, Vincent L. (2023-07-06). "Janassid petalodonts (Chondrichthyes, Petalodontiformes, Janassidae) from the middle Mississippian (Viséan) Ste. Genevieve Formation, Mammoth Cave National Park, Kentucky, USA". Historical Biology: 1–10. doi:10.1080/08912963.2023.2231955. ISSN 0891-2963.
- ^ Lazaro, Enrico de (2023-10-16). "Paleontologists Discover New Species of Ancient Petal-Toothed Shark | Sci.News". Sci.News: Breaking Science News. Retrieved 2023-10-17.