The Calizas de Lychnus Formation is a Maastrichtian geologic formation in northern central Spain. Dinosaur remains diagnostic to the genus level are among the fossils that have been recovered from the formation.Weishampel, et al. (2004). "Dinosaur distribution." Pp. 517-607.
Fossil content Dinosaurs cf. Euronychodon sp. cf. Paronychodon sp. (?Troodontidae indet.) ?Hypselosaurus sp. Nodosauridae indet. Rhabdodontidae indet. Titanosauridae indet. Dinosauria indet. Sauropoda indet. ?Dromaeosauridae indet.
Invertebrates Bithynella sp. Physa cf. patula
Fish Actinopterygii indet.
Other reptiles Acynodon lopezi Crocodylia indet. Eusuchia indet. Testudines indet.
Mammals Labes quintanillensis ?Palaeoryctidae indet.
Flora Typha sp. Arecaceae indet. Charophyta indet.
See also List of dinosaur-bearing rock formations List of stratigraphic units with few dinosaur genera
References
Bibliography Weishampel, David B.; Dodson, Peter; and Osmólska, Halszka (eds.): The Dinosauria, 2nd, Berkeley: University of California Press. 861 pp. C. Pol, A. D. Buscalioni, J. Carballeira, V. Francés, N. López Martínez, B. Marandat, J. J. Moratalla, J. L. Sanz, B. Sigé and J. Villatte. 1992. Reptiles and mammals from the Late Cretaceous new locality Quintanilla del Coco (Burgos Province, Spain). Neues Jahrbuch für Geologie und Paläontologie - Abhandlungen 184(3):279-314 J. L. Sanz, A. D. Buscalioni, J. J. Moratalla, V. Francés, and M. Antón. 1990. Los reptiles Mesozoicos del registro español [The Mesozoic reptiles from the Spanish record]. Monografias del Museo Nacional de Ciencias Naturales 2:1-79