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Crinoides de Gondwana descubren diversidad oculta y rutas de dispersión de crinoideos
Mariusz A Salamon1, Madani Benyoucef2, Mohamed Amine Zaidi2
1University of Silesia in Katowice, Będzińska 60, 41-200, Sosnowiec, Poland. paleo.crinoids@poczta.fm.
Scientific reports
|February 4, 2026
Resumen
Nuevos fósiles de crinoideos del Jurásico de Argelia revelan una diversidad inesperada y amplían el rango conocido de géneros clave como Apsidocrinus y Tetracrinus. Este descubrimiento mejora la comprensión de la vida marina antigua y la biogeografía en el hemisferio sur.
Área de la Ciencia:
- Paleontología
- Biología Marina
- Estratigrafía
Sus antecedentes:
- El registro fósil del orden de crinoideos Cyrtocrinida en los continentes del sur es escaso.
- Los cirtocrínidos muestran una diversidad morfológica y ecológica significativa.
Objetivo del estudio:
- Documentar nuevos fósiles de cirtocrínidos del Jurásico de Argelia.
- Investigar la paleobiogeografía de los cirtocrínidos en los márgenes de Gondwana.
Principales métodos:
- Excavación e identificación de fósiles.
- Análisis de rangos estratigráficos y geográficos.
- Reconstrucción paleobiogeográfica.
Principales resultados:
- Descubrimiento de tres nuevos taxones de cirtocrínidos de Argelia.
- Primer cirtocrínido inequívoco del margen gondwaniano del hemisferio sur.
- Ampliación de los rangos geográficos y estratigráficos de Apsidocrinus y Tetracrinus a las etapas Calloviana y Oxfordiana.
- Identificación de nuevos vínculos paleobiogeográficos a lo largo de los márgenes sur de Tetis y del paleopacífico.
Conclusiones:
- Existen lagunas significativas en el registro fósil de cirtocrínidos del sur.
- Nuevos descubrimientos pueden refinar los modelos de evolución, dispersión y paleobiogeografía de los cirtocrínidos.
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