Arnioceras is an extinct genus of large, evolute, discoidal ammonite from the Lower Jurassic. The shell is normally coiled so that all whorls are exposed. Sides bear strong sharp ribs that are straight until reaching the ventrolateral edge where they swing forward and fade. The rim (venter) is keeled and free of grooves. Arnioceras, named by Alpheus Hyatt, is included in the arietitid family of the Psiloceratoidea, an ammonitid supefamily. Its distribution is fairly worldwide, having been found in Europe, south Asia, and North and South America.
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| - Arnioceras (en)
- Arnioceras (de)
- Arnioceras (es)
- Arnioceras (pl)
- 阿爾尼奧菊石 (zh)
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| - Arnioceras is an extinct genus of large, evolute, discoidal ammonite from the Lower Jurassic. The shell is normally coiled so that all whorls are exposed. Sides bear strong sharp ribs that are straight until reaching the ventrolateral edge where they swing forward and fade. The rim (venter) is keeled and free of grooves. Arnioceras, named by Alpheus Hyatt, is included in the arietitid family of the Psiloceratoidea, an ammonitid supefamily. Its distribution is fairly worldwide, having been found in Europe, south Asia, and North and South America. (en)
- Arnioceras ist eine Gattung recht großer, evoluter, scheibenförmiger Ammoniten. Sie tritt als Leitfossil im Sinemurium nahezu weltweit auf. (de)
- Arnioceras – rodzaj głowonogów z podgromady amonitów. Żył w okresie jury (synemur). (pl)
- 阿爾尼奧菊石（學名：Arnioceras）是生存在早侏羅世海洋中的一屬菊石。其化石分布於全世界，在歐洲、南亞和美洲等地都有發現。 (zh)
- Arnioceras es un género extinto de amonites grandes, evolutas y discoidales del Jurásico Inferior. El caparazón normalmente se enrolla para que todos los verticilos queden expuestos. Los lados tienen costillas fuertes y afiladas que son rectas hasta llegar al borde ventrolateral donde se mueven hacia adelante y se desvanecen. El borde (vientre) tiene quilla y no tiene ranuras. (es)
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| - Arnioceras acuticarinatu (en)
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| - * Arnioceras arnouldi (Dumortier 1867)
* Arnioceras ceratitoides (Quenstedt 1848)
* Arnioceras fieldingiceroides (Dommergues and Faure 1986)
* Arnioceras insolitum (Fucini 1902)
* Arnioceras miserabile (Quendstedt 1858)
* Arnioceras nevadanum (Gabb 1869)
* Arnioceras paucicostum (Fucini 1901)
* Arnioceras rejectum (Fucini 1902)
* Arnioceras robustum (Quenstedt 1884)
* Arnioceras semicostatum (Young and Bird 1828)
* Arnioceras speciosum (Fucini 1902) (en)
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| - * Arniotites
* Burkhardticeras (Lopez 1967)
* Eparnioceras (Spath 1924)
* Laevispirus (Venturi and Nannarone 2002)
* Melanhippites (Crickmay 1928) (en)
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| - Arnioceras is an extinct genus of large, evolute, discoidal ammonite from the Lower Jurassic. The shell is normally coiled so that all whorls are exposed. Sides bear strong sharp ribs that are straight until reaching the ventrolateral edge where they swing forward and fade. The rim (venter) is keeled and free of grooves. Arnioceras, named by Alpheus Hyatt, is included in the arietitid family of the Psiloceratoidea, an ammonitid supefamily. Its distribution is fairly worldwide, having been found in Europe, south Asia, and North and South America. (en)
- Arnioceras ist eine Gattung recht großer, evoluter, scheibenförmiger Ammoniten. Sie tritt als Leitfossil im Sinemurium nahezu weltweit auf. (de)
- Arnioceras es un género extinto de amonites grandes, evolutas y discoidales del Jurásico Inferior. El caparazón normalmente se enrolla para que todos los verticilos queden expuestos. Los lados tienen costillas fuertes y afiladas que son rectas hasta llegar al borde ventrolateral donde se mueven hacia adelante y se desvanecen. El borde (vientre) tiene quilla y no tiene ranuras. Arnioceras, nombrado por Alpheus Hyatt, está incluido en la familia Arietitidae de Psiloceratoidea, una supefamilia ammonitida. Su distribución es bastante mundial, habiéndose encontrado en Europa, el sur de Asia y América del Norte y del Sur. (es)
- Arnioceras – rodzaj głowonogów z podgromady amonitów. Żył w okresie jury (synemur). (pl)
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