Prosobranchia

Drewry, G. 1987. Endangered and threatened wildlife and plants; Notice of findings on petitions and initiation of status review. Federal Register 52(126):24485-24488.

• single site
• Fontelicella
• Pecosorbia kansasensis
• Prosobranchia

Hershler, R and J. J. Landye. 1988. Arizona Hydrobiidae (Prosobranchia: Rissoacea). Smithsonian contributions to zoology. Num. 459:1-63.

• systematics
• Rissoacea
• snail
• Gastropoda
• Hydrobiidae
• Prosobranchia