''Selenichnites'' (‘moon track’) is a

Cambrian The Cambrian Period ( ; sometimes symbolized C with bar, Ꞓ) was the first geological period of the Paleozoic Era, and of the Phanerozoic Eon. The Cambrian lasted 53.4 million years from the end of the preceding Ediacaran Period 538.8 million ...

Jurassic The Jurassic ( ) is a Geological period, geologic period and System (stratigraphy), stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya. The J ...

trace fossil that has been found on every continent. It consists of crescent-shaped impressions interpreted as resting or burrowing traces of Xiphosura (extinct relatives of horseshoe crabs). The ichnogenus was originally named ''Selenichnus'' in 1987 by M. Romano and M. Whyte, but these investigators renamed it as ''Selenichnites'' in 1990 after it was pointed out that the name ''

Selenichnus ''Selenichnus'' is an ichnogenus of dinosaur and or pseudosuchian footprint. See also * List of dinosaur ichnogenera This list of dinosaur ichnogenera is a comprehensive listing of all ichnogenera that have been attributed to dinosaurs, excl ...

'' was already in use for a genus of reptile trace fossils.

References

Arthropod trace fossils Xiphosura {{arthropod-stub