Life reconstruction of Stethacanthus altonensis , right (female), left (male)。圖片來源：Dmitry Bogdanov，採用  CC BY-SA 3.0  授權 Age Devonian（Frasnian）-Carboniferous（Gzhelian） 382.7-298.9 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Chondrichthyes Order: Symmoriiformes Family: Stethacanthidae Genus: Stethacanthus Species: Stethacanthus altonensis Morphological description Stethacanthus altonensis  possessed a slender body with a moderate size. The most distinctive feature in

Reconstruction of Belantsea montana （圖片來源：Stanton F. Fink，採用  CC BY-SA 3.0  授權） Age Carboniferous（Serpukhovian） 330.9-323.2 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Chondrichthyes Order: Petalodontiformes Family: Belantseidae Genus: Belantsea Species: Belantsea montana Morphological description The fossil of Belantsea montana  was discovered in the Bear Gulch Limestone Member of Montana, USA. Its dentition consists of a symmetrical symphysial tooth family accomp

Reconstruction of Dracopristis hoffmanorum （圖片來源：Gasmasque，採用  CC BY-SA 4.0  授權。） Age Carboniferous（Kasimovian ） 307-303.7 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Chondrichthyes Order: Ctenacanthiformes Family: Ctenacanthidae Genus: Dracopristis Species: Dracopristis hoffmanorum Morphological description Dracopristis hoffmanorum  is a medium-sized ctenacanthiform shark, reaching approximately 2.06 meters in length. Its body is elongated and dorsoventrally flatt

Reconstruction of Aquilolamna milarcae （圖片來源：Apokryltaros，採用  CC BY-SA 4.0  授權） Age Cretaceous（Turonian） 93 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Chondrichthyes Order: Lamniformes (?) Family: Aquilolamnidae Genus: Aquilolamna Species: Aquilolamna milarcae Morphological description Aquilolamna milarcae  possessed exceptionally large, wing-like pectoral fins, with a span reaching approximately 1.9 meters, while the total body length was only about 1.65 meters. T

Reconstruction of Cosmoselachus mehlingi （感謝American Museum of Natural History提供） Age Carboniferous（Late Visean-Early Serpukhovian ） 331-326 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Chondrichthyes Order: Symmoriiformes Family: Falcatidae Genus: Cosmoselachus Species: Cosmoselachus mehlingi Morphological description The fossil of Cosmoselachus mehlingi  was originally recovered from the Fayetteville Shale as early as 1979. It was initially part of a private collec

Reconstruction of Harpagofututor volsellorhinus （圖片來源：Nix Draws Stuff，採用  CC BY-NC 4.0  授權） Age Carboniferous（Serpukhovian） 324-318 Ma Taxonomy Kingdom: Animalia Phylum: Chordata Class: Chondrichthyes Order: Chondrenchelyiformes Genus: Harpagofututor Species: Harpagofututor volsellorhinus Morphological Description The fossil specimens of Harpagofututor volsellorhinus  reach a maximum body length of approximately 17 cm. The body is elongate and eel-like in appearance. Males po