| Falcatus Temporal range: 335–318 Ma Middle Viséan - Late Serpukhovian |
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| Life restoration of female (top) and male (bottom) Falcatus falcatus | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Order: | Symmoriida |
| Family: | Falcatidae |
| Genus: | Falcatus Lund, 1985 |
| Species | |
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Falcatus is an extinct genus of Falcatidae which lived during the early Carboniferous Period in Bear Gulch bay and what is now Missouri. It was a 25-30 cm or 10-12 inches long "cladodont-toothed stethacanthid shark" [1] The first material known from the genus were the prominent fin spines that curved anteriorly over the head of the animal. When first described in 1883 from the St. Louis Limestone, these remains were given the name Physonemus falcatus. However, in 1985, fossils of a new type of condrichthyan from Montana were described that displayed a high degree of sexual dimorphism. The same spines that were previously named P. falcatus were found on one of the morphs, identified as the male due to the presence of valvae. As a result the present generic name was constructed for the species as well as the related F. hamatus and F. proclivus
Falcatus was featured briefly in an episode of Paleoworld called "Prehistoric Sharks".