Sonorella aguacalientensis H.A. Pilsbry& J.H. Ferriss, 1915
Helminthoglypta allyniana S.S. Berry, 1920 California, Kern County
Sonorella allynsmithi (W.O. Gregg& W.B. Miller, 1969) Arizona, Maricopa County
Sonorella ambigua H.A. Pilsbry& J.H. Ferriss, 1915 USA, Arizona23 mm
Sonorella anchana S.S. Berry, 1948 USA, California17,6 mm
Herpeteros angelus W.O. Gregg, 1949 California18,2 mm
Sonorella animasensis H.A. Pilsbry, 1939 USA, New Mexico16,6 mm
Sonorella apache H.A. Pilsbry& J.H. Ferriss, 1915 USA, Arizona18,1 mm
Chamaearionta aquaealbae (S.S. Berry, 1922) California, San Bernardino
Micrarionta areolata (G.B. III Sowerby in L. Pfeiffer, 1845) Mexico, Baja California Sur, La Paz
Eremariontoides argus (H.M. Edson, 1912) Hawaii
Sonorella arida H.A. Pilsbry& J.H. Ferriss, 1915
Helminthoglypta arrosa (W.G. Binney, 1858) California32 mm
Helminthoglypta arrosa marinensis H.A. Pilsbry, 1927 California25 mm
Helminthoglypta arrosa pomoensis (W.G. Binney, 1858) USA, California
Sonorella ashmuni P. Bartsch, 1904 Arizona, Tucson26,6 mm
Sonorelix avawatzica (S.S. Berry, 1930) California14,6 mm
Helminthoglypta avus P. Bartsch, 1916 California, Kern County
Helminthoglypta ayersiana (W. Newcomb, 1861) California20 mm
Sonorella baboquivariensis H.A. Pilsbry& J.H. Ferriss, 1915 USA, Arizona20 mm
Sonorella baboquivariensis depressa H.A. Pilsbry& J.H. Ferriss, 1906 USA, Arizona17,4 mm
Sonorella bagnarai W.B. Miller, 1967 Arizona, Pima County
Sonorelix baileyi (P. Bartsch, 1904) California15 mm
Sonorelix baileyi eremita (H.A. Pilsbry, 1939) California14,2 mm
Sonorella bartschi H.A. Pilsbry& J.H. Ferriss, 1915 USA, Arizona18,3 mm
Micrarionta beatula T.D.A. Cockerell, 1929 California10 mm
Helminthoglypta benitoensis H.N. Lowe, 1930 California, San Bernardino
Sonorella bequaerti W.B. Miller, 1967 Arizona, Pima County
Helminthoglypta berryi G.D. Hanna, 1929 California, Kern County
Helminthoglypta betheli (J. Henderson, 1914)
Sonorella bicipitis H.A. Pilsbry& J.H. Ferriss, 1910 USA, Arizona22,8 mm
Sonorella binneyi H.A. Pilsbry& J.H. Ferriss, 1910 USA, Arizona18,5 mm
Sonorella binneyi franciscana H.A. Pilsbry& J.H. Ferriss, 1919 USA, Arizona17,2 mm
Sonorelix borregoensis (S.S. Berry, 1929)
Sonorelix borrogoensis (S.S. Berry, 1929) California22,8 mm