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Digiriendo un ecosistema antiguo: coprolitos del yacimiento de Grippia, Triásico Inferior, Svalbard

Vanja Simonsen¹, Aubrey Jane Roberts^1,2, Victoria Sjøholt Engelschiøn¹

¹Natural History Museum, University of Oslo, Oslo, Norway.

|February 23, 2026

Resumen

Heces fosilizadas de Svalbard revelan diversa vida marina en el Triásico Temprano, incluyendo peces, reptiles marinos y la primera evidencia de invertebrados como espículas de esponja y cefalópodos.

Área de la Ciencia:

Paleontología; Biología Marina; Geología

Sus antecedentes:

El yacimiento de Grippia del Triásico Inferior en Svalbard contiene restos fragmentados de vertebrados marinos.
Los coprolitos son indicadores valiosos de dietas y ecosistemas pasados.

Objetivo del estudio:

Clasificar y analizar coprolitos del yacimiento de Svalbard.
Identificar inclusiones dentro de coprolitos para reconstruir la red alimentaria del Triásico Temprano.

Principales métodos:

Clasificación morfológica de 97 coprolitos.
Análisis de inclusiones mediante secciones delgadas, microscopía electrónica de barrido (SEM) y microtomografía computarizada (micro-CT).

Principales resultados:

Se identificaron cinco morfotipos distintos de coprolitos.
Las inclusiones incluyeron material esquelético, escamas de peces, espículas de esponjas, fragmentos de caparazones de cefalópodos y oniquitas.
El escaneo CT demostró ser eficaz para identificar inclusiones de baja densidad como las oniquitas.

Conclusiones:

El estudio amplía el conocimiento del paleoecosistema marino y la red alimentaria del Triásico Temprano en Svalbard.
Los posibles productores de coprolitos incluyen condrictios, osteíctios, ictiopterigios y temnospóndilos.
Se demostró un nuevo método de escaneo CT para el análisis paleobiológico.

Palabras clave:

CT Coprolitos Paleoecología Svalbard Triásico Formación Vikinghøgda

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