First Record of Gregarious Behavior in Robust Medium-Sized Jurassic Ornithopods: Evidence from the Kimmeridgian Trackways of Asturias (N. Spain) and Some General Considerations on Other Medium-Large Ornithopod Tracks in the Mesozoic Record

Autor:	Mike Romano, Laura Piñuela, José Ignacio Ruiz-Omeñaca, José Carlos García-Ramos
Rok vydání:	2016
Předmět:	010506 paleontology biology Paleontology 010502 geochemistry & geophysics Draconyx biology.organism_classification 01 natural sciences Cretaceous Cumnoria Period (geology) Mesozoic Geology 0105 earth and related environmental sciences Ornithopod
Zdroj:	Ichnos. 23:298-311
ISSN:	1563-5236 1042-0940
DOI:	10.1080/10420940.2016.1178640
Popis:	At least four parallel trackways of medium-sized and robust ornithopods are described from the Upper Jurassic Terenes tracksite in Asturias (N. Spain). While the tracks and trackways of small and gracile ornithopods are common in the Jurassic record, large ornithopods are very rare in this period. Ornithopod gregarious behavior has been recorded from many Cretaceous ichnoassemblages, but there are few examples from the Jurassic, and these always relate to small individuals. The Asturian tracks are quite different from known ichnogenera, but they are not sufficiently well preserved to propose a new one. Medium-large Jurassic ornithopods with robust feet such as Draconyx or Cumnoria are the best candidates to be the trackmakers.
Databáze:	OpenAIRE
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