Caridosuctor is an extinct genus of marine coelacanth that lived during the Carboniferous period (Serpukhovian stage, about 318 - 326 million years ago). It contains a single species, C. populusum, with fossils known from the Bear Gulch Limestone in Montana.Rhabdodermatidae - Paleobiology Database It is the largest and most common coelacanth known from Bear Gulch, reaching a body length of .Lund WL, Lund R, Klein G. Coelacanth feeding mechanisms and ecology of the Bear Gulch coelacanths. Compte Rendus du Neuvième Congrès International sur la Stratigraphie et la Géologie du Carbonifère. 1985;5:492–500. In a 1985 study in which the species was nicknamed "long body", it was suggested to be a slow cruising predator with stomach contents indicating that its diet included fish and crustaceans (including the early mantis shrimp Tyrannophontes) and was probably an environmental generalist.
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Fossil fishes of Bear Gulch: Caridosuctor populosum