Bifericeras is a Lower Jurassic ammonite belonging to the family Eoderoceratidae, and sometimes placed in the subfamily Xipherceratinae. Whorls are strongly depressed, but still evolute in coiling. The early growth state is prolonged, and smooth, followed by a late growth stage with rounded, straight, bituberculate ribs. Bifericeras was named by Buckman in 1913 and is found in Europe.
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| - Bifericeras (en)
- Bifericeras (nl)
- Bifericeras (pl)
- Bifericeras (pt)
- 對菊石 (zh)
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| - Bifericeras is a Lower Jurassic ammonite belonging to the family Eoderoceratidae, and sometimes placed in the subfamily Xipherceratinae. Whorls are strongly depressed, but still evolute in coiling. The early growth state is prolonged, and smooth, followed by a late growth stage with rounded, straight, bituberculate ribs. Bifericeras was named by Buckman in 1913 and is found in Europe. (en)
- Biferoceras is een uitgestorven geslacht van mollusken, dat leefde tijdens het Vroeg-Jura. (nl)
- Bifericeras – rodzaj głowonogów z wymarłej podgromady amonitów. Żył w okresie jury (synemur). (pl)
- Bifericeras é um gênero extinto do filo Mollusca, da família . (pt)
- 對菊石（學名：Bifericeras），又名畢佛菊石，是生存於侏羅紀早期的一屬菊石，生活在深度適中的海域中，以小型無脊椎動物或其他屍體為食。如同其他菊石，殼體較大的對菊石為雌性，殼體較小的對菊石則為雄性，較大的體型有利於雌性菊石的產卵及孵化。其化石僅被發現於英格蘭薩默塞特郡的。國際地層委員會將屬化石和本屬下Bifericeras donovani化石的訂為侏羅紀普連斯巴奇期開始的標誌。 (zh)
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| - *B. annulosum
*B. bifer
*B. curvicosta
*B. juengsti
*B. nudicosta
*B. reclinatum
*B. serpentinum
*B. soelli
*B. subplanicosta
*B. vitreum (en)
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| - Bifericeras is a Lower Jurassic ammonite belonging to the family Eoderoceratidae, and sometimes placed in the subfamily Xipherceratinae. Whorls are strongly depressed, but still evolute in coiling. The early growth state is prolonged, and smooth, followed by a late growth stage with rounded, straight, bituberculate ribs. Bifericeras was named by Buckman in 1913 and is found in Europe. (en)
- Biferoceras is een uitgestorven geslacht van mollusken, dat leefde tijdens het Vroeg-Jura. (nl)
- Bifericeras – rodzaj głowonogów z wymarłej podgromady amonitów. Żył w okresie jury (synemur). (pl)
- Bifericeras é um gênero extinto do filo Mollusca, da família . (pt)
- 對菊石（學名：Bifericeras），又名畢佛菊石，是生存於侏羅紀早期的一屬菊石，生活在深度適中的海域中，以小型無脊椎動物或其他屍體為食。如同其他菊石，殼體較大的對菊石為雌性，殼體較小的對菊石則為雄性，較大的體型有利於雌性菊石的產卵及孵化。其化石僅被發現於英格蘭薩默塞特郡的。國際地層委員會將屬化石和本屬下Bifericeras donovani化石的訂為侏羅紀普連斯巴奇期開始的標誌。 (zh)
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