Appendix I
The following list includes all specimens examined in this study, with their respective localities and acronyms. Specimens in brackets were used in the distribution map, and those with an asterisk in the morphometric analysis. See Materials and Methods for abbreviations:
Phyllotis amicus (n = 12). PERU: Cajamarca; El Arenal, 1 km S and 6 km W Pomahuaca -6° 7' 44" S, -79° 3' 25.992" W (MVZ 135721*, 135722*); Ancash: 29 km S (by road), Casma -9° 42' 23.47" S, -78° 16' 25.21" W (MVZ 139262*, 139263*); Huaylas, Huallanca, Huallanca -8° 49' 8.47" S, -77° 51' 45.25" W (MUSM 2439 - 2442); Huarmey, Lomas de Lupin -10° 22' 0.12" S, -77° 55' 59.88" W (MUSM 2448); La Libertad: Valle del Moche (MUSM 2443); Camino a Otuzco (MUSM 2449); Lima: Cerro San Gerónimo (MUSM 2438).
Phyllotis andium (n = 48). PERU: Ancash: Pallasca, Conchuco, Buena Vista -8° 16' 55.06" S, -77° 51' 6.16" W (MUSM 4531*, 4532*, 4579*); Pallasca, Conchucos, Laguna Llamacocha -8° 14' 55.32" S, -77° 49' 1.02" W (MUSM 23230*, 23231*); Pallasca, Conchucos, Quebrada Chalhuacocha, Laguna Magullo Chico -8° 15' 13.61" S, -77° 48' 0.04" W (MUSM 23234*, 23235*); Pallasca, Conchucos, Quebrada Toldobamba -8° 14' 39.01" S, -77° 49' 49.26" W (MUSM 23236*); Pallasca, Quebrada Toldobamba, Vivero Cumbal -8° 15' 9.76" S, -77° 49' 43.5" W (MUSM 23238*, 23239*, 23240*, 23241*, 23242*, 23243); La Libertad: Daniel A. Carrión, Huamachuco, La Arena -7° 52' 30.14" S, -78° 8' 28.75" W (MUSM 24127*, 24128*, 24129*, 24130*, 24131, 24132, 24133, 24134*, 24159, 24160*, 24161*, 24162*, 24163*, 24164*, 24165*, 24166); Otuzco, Usquil, Coina (cuenca del Río Perejil, ca. Hostería El Sol) -7° 48' 12.67" S, -78° 22' 4.26" W (MUSM 24900*); Sánchez Carrión, Sanagorán, Sanagorán, Río Chuyuhual -7° 47' 7.91" S, -78° 8' 55.39" W (MUSM 24750*, 24751*, 24752*, 24753*, 24754*); Santiago de Chuco, Mollepata, Río Pampas -8° 12' 10.44" S, -77° 56' 58.13" W (MUSM 23244, 23245, 23246*); Santiago de Chuco, Mollepata, Río Pampas, Tablachaca -8° 12' 10.51" S, -77° 56' 58.24" W (MUSM 23247*); Santiago de Chuco, Quiruvilca, Quebrada Negra -7° 56' 17.52" S, -78° 12' 58.64" W (MUSM 23186); Santiago de Chuco, Quiruvilca, Lagunas Norte, Río Caballo Moro -8° 2' 25.19" S, -78° 13' 52.61" W (MUSM 24742*, 24743*, 24744*, 24745*, 24746*, 24747*, 24748*); Santiago de Chuco, Quiruvilca, Lagunas Norte, Río Perejil, San Pedro -7° 55' 22.91" S, -78° 16' 37.99" W (MUSM 24749*, 24902*).
Phyllotis gerbillus (n = 4). PERU: PIURA: Sechura, Médano Tres Brazos, a 10.2 Km E de Sechura -5° 33' 36.468" S, -80° 43' 43.14" W (MUSM 20936*); Sechura, Cerro Illescas (MUSM 2479*, 2480*); Paita, Colán, ca. Colán (MUSM 2481*).
Phyllotis definitus (n = 10). PERU: Ancash: Tinco, 2 km S and 15 Km W Huaraz -9° 33' 0" S, -77° 40' 0"W (MVZ 135791*, 135792*, 135793*); 1 km N and 12 km E Pariacoto -9° 30' 27.47" S, -77° 46' 26.54" W (MVZ 135794*, 135795, 135797*, 135802*, 135803*, 135805*, 135806*).
Phyllotis haggardi (n = 2). ECUADOR: Pichincha, 22 km NNE Quito, (1 km NW Equator Monument) -0° 1' 59.45" S, -78° 25' 27.73" W (MVZ 139575*); Pichincha, 26 km NNE Quito -0° 0' 30.08" N, -78° 24' 38.23" W (MVZ 140054*).
Phyllotis pearsoni (n = 52). PERU: Ancash:-Pallasca, Conchucos, Quebrada Chalhuacocha, Laguna Labrascocha [13] -8° 15' 20.66" S, -77° 44' 40.81" W (MUSM 23232); La Libertad: Santiago de Chuco, Quiruvilca, Campamento Callacuyán, Laguna Misha [5] -7° 57' 32.87" S, -78° 15' 8.17" W (MUSM 17429, 17430); Santiago de Chuco, Quiruvilca, Campamento Callacuyán, Laguna Negra [3] -7° 56' 20.47" S, -78° 14' 31.74" W (MUSM 17431 -Holotype); Santiago de Chuco, Quiruvilca, Laguna del Toro (MUSM 17247, 17248); Santiago de Chuco, Quiruvilca, Campamento Callacuyán, Quebrada Alto La Flor [10] -7° 59' 45.20" S, -78° 11' 27.31" W (MUSM 17432); Santiago de Chuco, Quiruvilca, Campamento Callacuyán -7° 56' 20.47" S, -78° 14' 31.74" W (MUSM 17436, 17437, 17438); Santiago de Chuco, Quiruvilca, arriba de Laguna Negra -7° 57' 4.536" S, -78° 14' 14.67" W (MUSM 17339); Santiago de Chuco, Quiruvilca, Lagunas Norte, Callacuyán -7° 57' 40.61" S, -78° 15' 35.32" W (MUSM 24755*, 24756*, 24757, 24758*, 24905, 24906*, 24907, 24908); Santiago de Chuco, Quiruvilca, Lagunas Norte, Shulcahuanga -7° 56' 29.90" S, -78° 15' 8.38" W (MUSM 24759, 24760*); Santiago de Chuco, Quiruvilca, Lagunas Norte, depresión camino a laguna Las Vizcachas -7° 55' 16.43" S, -78° 14' 58.38" W (MUSM 24762*); Santiago de Chuco, Quiruvilca, Las Vizcachas -7° 54' 54.47" S, -78° 14' 59.14" W (MUSM 24763*, 24764*); Santiago de Chuco, Quiruvilca, Lagunas Norte, quebrada Pampa Huacha -7° 58' 30. 72" S, -78° 16' 46.236" W (MUSM 24765*); Santiago de Chuco, Quiruvilca, Lagunas Norte, quebrada San Francisco [11] -8° 0' 0.83" S, -78° 16' 59.56" W (MUSM 24767*, 24768*, 24769*, 24770, 24914*, 24915, 24916*); Santiago de Chuco, Quiruvilca, Lagunas Norte, Río Negro -7° 55' 10.38" S, -78° 15' 16.13" W (MUSM 24771, 24772*, 24773); Santiago de Chuco, Quiruvilca, Cruce entre el Río Grande y el Río Moche [8] -7° 59' 8.45" S, 7-8° 21' 13.21" W (MUSM 24903*, 24904); Santiago de Chuco, Quiruvilca, Lagunas Norte, quebrada Alto La Flor [7] -7° 58' 33.89" S, -78° 12' 29.81" W (MUSM 24909*); Santiago de Chuco, Quiruvilca, Lagunas Norte, quebrada Pampa Huacha [6] -7° 58' 29.21" S, -78° 16' 45.41" W (MUSM 24910*, 24911*, 24912*, 24913*); Santiago de Chuco, Quiruvilca, Lagunas Norte, quebrada Vira Vira [4] -7° 57' 32.87" S, -78° 15' 8.17" W (MUSM 24917); Santiago de Chuco, Quiruvilca, Lagunas Norte, Río Caballo Moro [9] -7° 59' 31.06" S, -78° 14' 48.16" W (MUSM 24918*); Santiago de Chuco, Quiruvilca, Lagunas Norte, Río Cashanga [12] -8° 1' 32.88" S, -78° 15' 0.47" W (MUSM 24923); Santiago de Chuco, Quiruvilca, Lagunas Norte, Río Negro [2] -7° 54' 59.87" S, -78° 15' 20.63" W (MUSM 24924*, 24925, 24926); Cajamarca: Encañada, Combayo [1] -6° 57' 39.492" S, -78° 27' 39.78" W (MUSM 26517, 26518, 26519, 26520).