Fauna found in the area include three species of Echinodermata, two Cirripedia, Pelecy- poda, and 29 Gastropoda. Many new gastropod species were discovered in Jacalitos Creek including  Attralium arnoldi, Chrysodomus coalingemis, Fissuridea subelliplica, Murex perangulatui, Natica (Neverita) orbieularis, Trophon magister, Turritella nova; Pelecypoda : Mytilus ketvi, Tivela trigonalis.

Works Cited:

Jorgen O. Nomland, “Fauna from the Lower Pliocene at Jacalitos Creek and Waltham Canyon, Fresno County, California,” (North American Paleontology 1916) <http://journals.cambridge.org/download.php?file=%2FGEO%2FGEO6_3_08%2FS0016756800206043a.pdf&code=143cdf352a36a8ead990e75cf703ee45>