Helodus (from Шаблон:Lang-elШаблон:Transliteration, 'stud' and Шаблон:Lang-elШаблон:Transliteration 'tooth')[1] is an extinct genus of cartilaginous fish from the Upper Devonian through Lower Permian.[2] While the type species, H. simplex is known from an articulated specimen, the rest of the species in this genus are known entirely from isolated teeth.[3] Over twenty species have been attributed to this genus, many of which may be anterior teeth of other cartilaginous fish. This makes Helodus a wastebasket taxon.[4] For this reason, only the type species can be confidently attributed to this genus until articulated remains of other species are found.[3]H. simplex was around 30 centimeters long.[2]
↑ 2,02,1Arno Hermann Müller: Textbook of paleozoology. Volume III, Vertebrates, Part 1. Gustav Fischer Verlag, 1985.
↑ 3,03,1Itano, W.M., Lambert, L.L. A new cochliodont anterior tooth plate from the Mississippian of Alabama (USA) having implications for the origin of tooth plates from tooth files. Zoological Lett 4, 12 (2018). Шаблон:Doi
