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- Symmorium es un género extinto de peces cartilaginosos del orden Symmoriida, parecido a Stethacanthus, del que se diferencia por la ausencia de aleta dorsal en forma de yunque. Los científicos consideran que Symmorium era la hembra de Stethacanthus.[cita requerida]
* Datos: Q7661350
* Multimedia: Symmorium / Q7661350 (es)
- Symmorium is a dubious genus of extinct stethacanthid holocephalian from the Devonian and Carboniferous of the United States (Illinois) and Russia. The type species, Symmorium reniforme, was named by Edward Drinker Cope in 1893 and several other species were originally classed under this genus, but they have since been classified into other genera such as Petalodus. Symmorium bears close similarity in size and appearance to Stethacanthus but the former is missing the "spine and brush" on its back. Some paleontologists think that the two forms are simply the males and females of related species, while other scientists think they were distinct genera.
* Preserved S. reniforme specimen
* Tooth from an unnamed Symmorium species (en)
- Symmorium est un genre éteint de poissons cartilagineux qui donne son nom à la famille des Symmoriidae (ordre des Symmoriida). Le genre est connu en Amérique du Nord et en Russie. Il vit au cours du Dévonien terminal (Famennien) et du Carbonifère, entre environ -376 et -307 Ma (millions d'années). (fr)
- Symmorium is een uitgestorven haai behorend tot de Symmoriiformes die in het Devoon en Carboon leefde. (nl)
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- Devonian-Carboniferous, (en)
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- Fossil specimen of S. reniforme, Field Museum of Natural History (en)
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- Symmorium es un género extinto de peces cartilaginosos del orden Symmoriida, parecido a Stethacanthus, del que se diferencia por la ausencia de aleta dorsal en forma de yunque. Los científicos consideran que Symmorium era la hembra de Stethacanthus.[cita requerida]
* Datos: Q7661350
* Multimedia: Symmorium / Q7661350 (es)
- Symmorium est un genre éteint de poissons cartilagineux qui donne son nom à la famille des Symmoriidae (ordre des Symmoriida). Le genre est connu en Amérique du Nord et en Russie. Il vit au cours du Dévonien terminal (Famennien) et du Carbonifère, entre environ -376 et -307 Ma (millions d'années). (fr)
- Symmorium is een uitgestorven haai behorend tot de Symmoriiformes die in het Devoon en Carboon leefde. (nl)
- Symmorium is a dubious genus of extinct stethacanthid holocephalian from the Devonian and Carboniferous of the United States (Illinois) and Russia. The type species, Symmorium reniforme, was named by Edward Drinker Cope in 1893 and several other species were originally classed under this genus, but they have since been classified into other genera such as Petalodus. Symmorium bears close similarity in size and appearance to Stethacanthus but the former is missing the "spine and brush" on its back. Some paleontologists think that the two forms are simply the males and females of related species, while other scientists think they were distinct genera. (en)
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- Symmorium (es)
- Symmorium (fr)
- Symmorium (nl)
- Symmorium (en)
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