Published Sep 8th, 2021, 9/8/21 3:35 pm
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Tristychius is an extinct genus of shark from the Carboniferous period (Visean). Fossils of T. arcuatus, the type and only species, including fin spines have been found in Scotland.
It was a small shark with a well-developed caudal fin that was aimed upwards, similar to that of many modern sharks. Tristychius also had spikes attached to the bases of its dorsal fins, probably for protection against predators. The pectoral and pelvic fins had much narrower bases, and were therefore more flexible swimming appendages that the broad-based, rigid fins of earlier sharks, such as Cladoselache. The upper obe of teh tail was developed into the powerful, propulsive, upturned fin seen in modern-day pelagic sharks. It was related to the larger Hybodus.
Source 1: Tristychius - Wikipedia
Source 2: Tristychius | Fossil Wiki | Fandom
It was a small shark with a well-developed caudal fin that was aimed upwards, similar to that of many modern sharks. Tristychius also had spikes attached to the bases of its dorsal fins, probably for protection against predators. The pectoral and pelvic fins had much narrower bases, and were therefore more flexible swimming appendages that the broad-based, rigid fins of earlier sharks, such as Cladoselache. The upper obe of teh tail was developed into the powerful, propulsive, upturned fin seen in modern-day pelagic sharks. It was related to the larger Hybodus.
Source 1: Tristychius - Wikipedia
Source 2: Tristychius | Fossil Wiki | Fandom
| Credit | Wikipedia, Fossil Wiki, Nobu Tamura |
| Model | Salmon |
| Resolution | Vanilla |
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