morphology

Nesom, G. 1978. Erigeron hessii sp. nov. and Erigeron kuschei Eastwood (Compositae), two closely related narrow endemics from the southwestern United States. Brittonia 30(4): 440-446.

• type locality
• HABITAT
• morphology
• New Mexico
• diagnostic differences
• Erigeron hessii
• Arizona
• Asteraceae

Clench, W. J. and R. D. Turner. 1956. Freshwater mollusks of Alabama, Georgia, and Florida from the Escambia to the Suwanee River. Bulletin of the Florida State Museum Biological Sciences 1(3):97-239.

• morphology
• rara
• Unionidae
• nrDNA
• Zuni Pueblo
• distribution

Hershler, R.H., H.-S. Liu, and C.A. Stockwell. 2002. A new genus and species of aquatic gastropods (Rissooidea: Hydrobiidae) from the North American southwest: phylogenetic relationships and biogeography. Proceedings of the Biological Society of Washingto

Hershler, R.H. 2001. Systematics of the North and Central American aquatic snail genus Tryonia (Rissooidea: Hydrobiidae). Smithsonian Contributions to Zoology, 612: 1-53.

• identification
• Mollusca
• morphology
• distribution
• Gastropoda
• Hydrobiidae