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Genus	Species
Antrorbis	2
Aphaostracon	1
Aroapyrgus	1
Balconorbis	2
Chorrobius	1
Cochliopa	1
Cochliopina	1
Durangonella	0
Eremopyrgus	1
Eupaludestrina	6
Heleobia	121
Heleobops	3
Ipnobius	1
Juturnia	3
Lithococcus	1
Littoridina	0
Littoridinops	4
Mexipyrgus	2
Mexithauma	1
Minckleyella	1
Onobops	1
Phreatoceras	1
Pseudotryonia	4
Pyrgophorus	3
Semisalsa	3
Spurwinkia	1
Stygopyrgus	3
Texapyrgus	2
Trichonia	1
Tryonia	35
Vitropyrgus	1
Zetekina	1