Alocolytoceratinae is a subfamily of lytoceratids that comprises genera characterized by many deep constrictions in the shell resulting in capricorn-like (goat's horm) ornamention, especially in the middle whorls, but becoming smooth and more involute in the outer whorls. Saddle endings in the suture tend to be phylloid, (leaf-like). Alcolytocerainae includes Alocolytoceras, Lobolytoceras, , and , which are mostly from the Toarcian. One genus, Pachylotoceras, extends into the lower Bajocian.
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| - Alocolytoceratinae is a subfamily of lytoceratids that comprises genera characterized by many deep constrictions in the shell resulting in capricorn-like (goat's horm) ornamention, especially in the middle whorls, but becoming smooth and more involute in the outer whorls. Saddle endings in the suture tend to be phylloid, (leaf-like). Alcolytocerainae includes Alocolytoceras, Lobolytoceras, , and , which are mostly from the Toarcian. One genus, Pachylotoceras, extends into the lower Bajocian. (en)
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| - * Alocolytoceras
* Audaxlytoceras
* Derolytoceras
* Lobolytoceras
* Pachylytoceras
* Pleurolytoceras (en)
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| - Alocolytoceratinae is a subfamily of lytoceratids that comprises genera characterized by many deep constrictions in the shell resulting in capricorn-like (goat's horm) ornamention, especially in the middle whorls, but becoming smooth and more involute in the outer whorls. Saddle endings in the suture tend to be phylloid, (leaf-like). Alcolytocerainae includes Alocolytoceras, Lobolytoceras, , and , which are mostly from the Toarcian. One genus, Pachylotoceras, extends into the lower Bajocian. (en)
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