Trachyceratidae

Fossils of Trachyceratidae are found in marine strata from the Devonian to the Triassic. Fossils are known from many localities in Afghanistan, Canada, China, Europe (Slovenia, Spain, Switzerland, Ukraine), India, Japan, the Russian Federation, Thailand, and the United States. ==Description==

Trachyceratid shells are more or less involute and highly ornamented. They have their whorl sides covered with flexuous ribs that are usually tuberculate. The venters generally have a median furrow bordered by rows of tubercles or continuous keels. ==Classification==

Trachyceratidae • Boreotrachyceras Konstantinov 2012 • Brotheotrachyceras Urlichs 1994 • Hannaoceras Tomlin 1931 • Okhototrachyceras Konstantinov 2012 • Trachyceratinae Haug 1894 • Austrotrachyceras Krystyn 1978 • Muensterites Mojsisovics 1893 • Trachyceras Laube 1869 • Neoprotrachyceras Krystyn 1978 • Arpaditinae Hyatt 1900 • Arctoarpadites Tozer 1994 • Arctosirenites Tozer 1961 • Arpadites Mojsisovics 1879 • Dittmarites Mojsisovics 1893 • Edmundites Diener 1916 • Hisnitites Tozer 1994 • Otoarpadites Tozer 1994 • Sirenotrachyceras Krystyn 1978 • Striatosirenites Popov 1961 • Asklepioceras Renz 1910 • Sinomeginoceras Balini and Zou 2015 == Gallery ==

File:Trachyceras fossil at NMMNHS.jpg|Trachyceras sp. at the New Mexico Museum of Natural History and Science File:Museo delle Grigne - EL88 - Arpadites (Arpadites) szaboi.jpg|Arpadites szaboi File:Museo delle Grigne - EL96A - Arpadites (Arpadites) arpadis.jpg|Arpadites arpadis File:Museo delle Grigne - EL66 - Arpadites telleri.jpg|Arpadites telleri File:Trachyceratidae - Protrachyceras psaeudoarchelonus.JPG|Protrachyceras psaeudoarchelonus File:Protrachyceras archelaus.JPG|Protrachyceras archelaus File:Anolcites doleriticus.jpg|Anolcites doleriticus File:Asklepioceras sp Ladinico Val Badia.JPG|Asklepioceras sp. at Museo di Storia naturale "Antonio Stoppani" File:Protrachyceras gortanii Rasa.JPG|Falsanolcites gortanii (also known as Protrachyceras gortanii) ==References==