Exceptional soft-tissue preservation in a theropod dinosaur from Italy

The Lower Cretaceous Pietraroia Plattenkalk (Benevento Province, southern Italy) has been known since the eighteenth century for its beautifully preserved fossil fishes. During Albian time (about 113 Myr ago), deposition of fine marly limestone in a shallow lagoonal environment, affected by cyclic p...

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Bibliographic Details
Published in:Nature (London) 1998-03, Vol.392 (6674), p.383-387
Main Authors: Sasso, Cristiano Dal, Signore, Marco
Format: Article
Language:English
Subjects:
Anatomy
Brazil
Cretaceous
Deposition
Dinosaurs
Earth sciences
Earth, ocean, space
Exact sciences and technology
Fish
Fossils
Humanities and Social Sciences
letter
Limestone
multidisciplinary
Paleontology
Preservation
Science
Science (multidisciplinary)
Soft tissues
Vertebrate paleontology
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Summary:The Lower Cretaceous Pietraroia Plattenkalk (Benevento Province, southern Italy) has been known since the eighteenth century for its beautifully preserved fossil fishes. During Albian time (about 113 Myr ago), deposition of fine marly limestone in a shallow lagoonal environment, affected by cyclic periods of low oxygen levels, led to exceptional preservation of soft tissue in a juvenile theropod. The specimen, diagnosed here as Scipionyx samniticus gen. et sp. nov., is the first dinosaur ever to be found in Italy. The fossil has been mentioned previously in two brief notes, and generally examined in a doctoral thesis. Here we report the full preparation of the specimen which shows details of soft anatomy never seen previously in any dinosaur. The preservation is better than in other lagerstätten (conservative deposits) where theropod soft tissue has been reported, such as the Santana Formation of Brazil and the Yixian Formation of China. Despite this, there is no evidence of feathers or any other integumentary remnants in the Italian specimen. Scipionyx represents a new maniraptoriform theropod. Its discovery is remarkable considering also the scarcity of juvenile theropod dinosaurs in the fossil record.
ISSN:0028-0836
1476-4687
DOI:10.1038/32884