Grotta Del Fiume- Grota Grande Del Veneto Cave System (Italy)

The hypogenic karst complex of Frasassi Caves are located in the Mediterranean region, on eastern slopes of the Apennines in central Italy. The caves are formed in Jurassic and Cretacic limestones, and consist in a dendritic network of superimposed and interconnected levels located at different elevations in the Frasassi Gorge incised by the Sentino River in different steps. The Frasassi cave system hosts an incredible diversity of groundwater metazoan community supported by sulphur-based lithoautotrofic bacteria and a large number of endemic species. The number of invertebrate species found in Frasassi cave system is 56 of which 16 are endemics.

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