Arietitidae is a family of true ammonites that make up part of the superfamily Psiloceratoidea, named after the type genus Arietites. They comprise medium-size to large or gigantic genera which in general are strongly ribbed, tuberculate in some, with keeled or grooved and keeled venters, and well differentiated ammonitic sutures. The aptycus is single valved with a shiny, concentrically striated surface. Arietitidae dominated Lower Jurassic, Sinemurian ammonites, worldwide, extending into the lower Pliensbachian.
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| - Arietitidae (en)
- Arietitidae (es)
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| - Arietitidae is a family of true ammonites that make up part of the superfamily Psiloceratoidea, named after the type genus Arietites. They comprise medium-size to large or gigantic genera which in general are strongly ribbed, tuberculate in some, with keeled or grooved and keeled venters, and well differentiated ammonitic sutures. The aptycus is single valved with a shiny, concentrically striated surface. Arietitidae dominated Lower Jurassic, Sinemurian ammonites, worldwide, extending into the lower Pliensbachian. (en)
- Arietitidae es una familia de amonitas verdaderas que forman parte de la superfamilia Psiloceratoidea, nombrada así por el género tipo Arietites. Se componen de géneros de tamaño mediano a grande o gigantes, que en general son fuertemente nervados, tuberculados en algunos, con vientres con quillas o con estrías y quillas, y suturas amoníticas bien diferenciadas. El aptycus tiene una sola válvula con una superficie brillante y estriada concéntricamente. Arietitidae dominó las amonitas del Jurásico Inferior , Sinemuriense , en todo el mundo, extendiéndose hasta el Pliensbachiense inferior . (es)
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| - Asteroceras stellare (en)
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subdivision
| - * Alsatitinae
* Arietitinae
* Agassiceratinae
* Pseudotropitinae
* Asteroceratinae
* Hypasteroceratinae (en)
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| - Arietitidae is a family of true ammonites that make up part of the superfamily Psiloceratoidea, named after the type genus Arietites. They comprise medium-size to large or gigantic genera which in general are strongly ribbed, tuberculate in some, with keeled or grooved and keeled venters, and well differentiated ammonitic sutures. The aptycus is single valved with a shiny, concentrically striated surface. Arietitidae dominated Lower Jurassic, Sinemurian ammonites, worldwide, extending into the lower Pliensbachian. The Arietitidae may have their origin in the Schlotheimiidae if not directly from the Psiloceratidae, and is the probably source for the Oxynoticeratidae. (en)
- Arietitidae es una familia de amonitas verdaderas que forman parte de la superfamilia Psiloceratoidea, nombrada así por el género tipo Arietites. Se componen de géneros de tamaño mediano a grande o gigantes, que en general son fuertemente nervados, tuberculados en algunos, con vientres con quillas o con estrías y quillas, y suturas amoníticas bien diferenciadas. El aptycus tiene una sola válvula con una superficie brillante y estriada concéntricamente. Arietitidae dominó las amonitas del Jurásico Inferior , Sinemuriense , en todo el mundo, extendiéndose hasta el Pliensbachiense inferior . Los Arietitidae pueden tener su origen en Schlotheimiidae, si no directamente de Psiloceratidae y es probablemente la fuente de Oxynoticeratidae . (es)
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