Hyla regilla sierra Jameson, Mackey, and Richmond, 1966, Proc. California Acad. Sci., Ser. 4, 33: 599. Holotype: CAS 100991, by original designation. Type locality: "1 1/4 miles SSE. of Tioga Pass Ranger Station (east of entrance to Yosemite National Park); R25E, T1N, S31, 9.600 feet [elevation]", California, USA.
Hyla regilla palouse Jameson, Mackey, and Richmond, 1966, Proc. California Acad. Sci., Ser. 4, 33: 599. Holotype: CAS 100982, by original designation. Type locality: "6 miles SE. of La Grande, Oregon, at the junction of highways US 30 and Oregon 203, 2,800 feet [elevation]", USA.
Hyla sierra — Recuero, Martínez-Solano, Parra-Olea, and García-París, 2006, Mol. Phylogenet. Evol., 41: 511.
Eastern Oregon Treefrog (Pseudacris regilla palouse [no longer recognized]: Crother, Boundy, Campbell, de Queiroz, Frost, Highton, Iverson, Meylan, Reeder, Seidel, Sites, Taggart, Tilley, and Wake, 2001 "2000", Herpetol. Circ., 29: 13).
Sierran Treefrog (Pseudacris regilla sierra: Crother, Boundy, Campbell, de Queiroz, Frost, Highton, Iverson, Meylan, Reeder, Seidel, Sites, Taggart, Tilley, and Wake, 2001 "2000", Herpetol. Circ., 29: 13).
Sierran Treefrog (Pseudacris sierra: Frost, McDiarmid, and Mendelson, 2008, in Crother (ed.), Herpetol. Circ., 37: 10; Frost, McDiarmid, Mendelson, and Green, 2012, in Crother (ed.), Herpetol. Circ., 39: 20).
Sierra Chorus Frog (Pseudacris sierra: Collins and Taggart, 2009, Standard Common Curr. Sci. Names N. Am. Amph. Turtles Rept. Crocodil., ed. 6: 7).
Highly provisional (see comment): central California, eastern Oregon, Idaho, and western Montana, USA; presumably extreme northwestern Utah.
Recuero, Martínez-Solano, Parra-Olea, and García-París, 2006, Mol. Phylogenet. Evol., 39: 293-304, partitioned this taxon (as Pseudacris regilla, sensu stricto—name applied in error; see comment under Pseudacris regilla) out of former Pseudacris regilla (sensu lato), but did not detail the range and the zone of contact with both Pseudacris regilla and Pseudacris hypochondriaca is not documented. See comment under Pseudacris regilla.
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