Table S1: Supplementary data. AB – Alberta; AK- Alaska; BC – British Columbia; CA – California; MO – Montana; OR – Oregon; WA – Washington; YU – Yukon.

State-Prov / Range / Glacier / Lat / Longit / Researcher / Ice Worms Present
AK / Alaska / Maclaren / 63.31 / 146.53 / Shain et al. (2001) / no
AK / Chugach / Matanuska / 61.79 / 147.79 / Shain et al. (2001), Hartzell / no
AK / St. Elias / No Name, Nugget Creek / 61.68 / 143.74 / Hartzell / no
AK / St. Elias / Kuskalana / 61.64 / 143.68 / Hartzell / no
AK / St. Elias / No name E of Kuskalana terminus / 61.62 / 143.69 / Hartzell / no
AK / Chugach / Valdez / 61.17 / 146.16 / Hartzell / no
AK / Chugach / Worthington / 61.17 / 61.17 / Shain et al. (2001) / no
AK / Chugach / Shoup / 61.17 / 146.67 / Hartzell / no
AK / Chugach / Milk / 61.06 / 149.09 / Shain et al. (2001) / yes
AK / Chugach / Alyeska / 60.96 / 60.96 / Shain et al. (2001) / no
AK / Chugach / Learnard / 60.80 / 148.72 / Shain et al. (2001) / yes
AK / Kenai / Byron / 60.75 / 148.86 / Shain et al. (2001), Boggs Visitors Center (Hartzell) / yes
AK / Kenai / Portage / 60.74 / 148.79 / Shain et al. (2001) / yes
AK / Chugach / Bagley / 60.51 / 141.95 / Tynen (1970) / yes
YU / Elias / Seward / 60.30 / 140.26 / Odell (1949) / yes
AK / Kenai / Exit / 60.18 / 149.72 / Shain et al. (2001) / yes
AK / Kenai / Alice / 60.14 / 149.30 / Shain / yes
AK / Kenai / Burns / 60.13 / 148.30 / Shain et al. (2001) / yes
AK / Kenai / Marathon / 60.11 / 149.48 / Shain et al. (2001) / yes
AK / St. Elias / Malaspina / 60.00 / 140.50 / Russel (1892), Emery (1898), Moore (1899), Shain et al. (2001) / yes
AK / Kenai / Grewingk / 59.60 / 151.05 / Shain et al. (2001) / no
AK / Coast / Laughton / 59.53 / 135.10 / Shain et al. (2001) / no
BC / St. Elias / Grand Pacific / 59.14 / 137.18 / Welch (1917); Holden (Hartzell) / yes
AK / St. Elias / Muir / 59.08 / 136.37 / Eisen (1904), Wright (1887), Odell (1949) / yes
BC / St. Elias / Grand Pacific/Grand Plateau Junction / 59.07 / 137.88 / Holden (Hartzell) / yes
BC / St. Elias / Ferris / 59.06 / 137.26 / Holden (Hartzell) / yes
AK / St. Elias / Casement / 59.01 / 135.94 / Tynen (1970), Goodman (1971) / yes
AK / St. Elias / Burroughs / 58.99 / 136.30 / Tynen (1970) / yes
AK / St. Elias / Geikie / 58.59 / 136.61 / Odell (1949) / yes
AK / St. Elias / La Perouse / 58.49 / 137.26 / Eisen (1904) / yes
AK / Coast / Mendenhall / 58.45 / 134.55 / Hartzell, Shain et al. (2001) / no
AK / Coast / Lemon Creek / 58.39 / 134.35 / Hartzell / no
AK / Coast / Ptarmigan / 58.38 / 134.38 / Hartzell / no
BC / Coast / Frank Mackie / 56.32 / 130.17 / Tynen (1970) / yes
BC / Coast / Le Duc / 56.22 / 130.37 / Tynen (1970) / yes
BC / Coast / Salmon / 56.12 / 130.07 / Tynen (1970) / yes
BC / Coast / Stewart / 55.89 / 129.83 / Tynen (1970) / yes
BC / Coast / Howson / 54.45 / 127.75 / Tynen (1970) / yes
BC / Coast / Atna / 53.95 / 128.05 / Tynen (1970) / yes
BC / Kootenay / Robson / 53.13 / 119.10 / Tynen (1970) / no
BC / Kootenay / No Name / 52.99 / 120.44 / Tynen (1970) / no
BC / Coast / Mt. Creswell / 52.58 / 126.58 / Tynen (1970) / yes
AB / Kootenay / Athabasca / 52.19 / 117.26 / Tynen (1970), Hartzell / no
BC / Coast / Jacobsen / 52.05 / 126.13 / Tynen (1970) / yes
BC / Coast / Monarch / 51.95 / 126.03 / Tynen (1970) / yes
BC / Coast / Pantheon / 51.75 / 125.13 / Tynen (1970) / yes
BC / Kootenay / Bow / 51.65 / 116.53 / Tynen, Hartzell / no
AB / Kootenay / Yoho / 51.60 / 116.49 / Hartzell / no
AB / Kootenay / Diableret / 51.60 / 116.46 / Hartzell / no
BC / Coast / Klinaklini / 51.47 / 125.78 / Tynen (1970) / yes
BC / Coast / Remote / 51.47 / 125.52 / Tynen (1970) / yes
BC / Coast / Scimitar / 51.45 / 125.22 / Tynen (1970) / yes
BC / Coast / Tiedemann / 51.33 / 125.05 / Tynen (1970) / yes
BC / Coast / Waddington / 51.32 / 125.17 / Tynen (1970) / yes
BC / Coast / Confederation / 51.30 / 125.47 / Tynen (1970) / yes
BC / Coast / Franklin / 51.27 / 125.38 / Tynen (1970) / yes
BC / Kootenay / Illecillewaet / 51.24 / 117.17 / Tynen (1970) / no
BC / Coast / Majestic / 51.22 / 124.38 / Tynen (1970) / yes
BC / Coast / Cumsack / 50.95 / 125.00 / Tynen (1970) / yes
BC / Coast / Meager Creek-Lillooet / 50.61 / 123.39 / Tynen (1970) / yes
BC / Pacific / Armchair / 50.27 / 122.78 / Hartzell / no
BC / Pacific / Weart / 50.16 / 122.79 / Hartzell / yes
BC / Pacific / Wedgemount Disconnect / 50.16 / 122.79 / Hartzell / yes
BC / Pacific / No Name, btwn Wedgemount and Weart / 50.16 / 122.79 / Hartzell / no
BC / Pacific / Wedgemount / 50.16 / 122.78 / Hartzell / yes
BC / Coast / Kwoiek / 50.08 / 121.95 / Tynen (1970) / yes
BC / Pacific / Overlord / 50.02 / 122.84 / Hartzell / yes
BC / Coast / Diavolo / 50.01 / 122.80 / Tynen (1970) / yes
BC / Coast / Helm / 49.96 / 123.00 / Tynen (1970) / yes
BC / Coast / Sphinx / 49.92 / 122.96 / Tynen (1970) / yes
BC / Coast / Sentinel / 49.89 / 122.98 / Tynen (1970) / yes
BC / Coast / Mt Tantalus / 49.82 / 123.30 / Tynen (1970) / yes
BC / Coast / Misty / 49.81 / 122.63 / Tynen (1970) / yes
BC / Coast / Tantalus-Lovely Water / 49.78 / 123.27 / Tynen (1970) / yes
BC / Kootenay / Kokanee / 49.75 / 117.14 / Tynen (1970) / no
BC / Coast / Roderick / 49.70 / 123.32 / Tynen (1970) / yes
BC / Coast / Sky Pilot / 49.63 / 123.08 / Tynen (1970) / yes
BC / Vancouver Island / Cliffe / 49.53 / 125.40 / Tynen (1970) / yes
BC / Vancouver Island / Big Interior North / 49.47 / 125.57 / Tynen (1970) / yes
WA / North Cascades / Ptarmigan / 48.82 / 121.75 / Hartzell / yes
WA / North Cascades / Mazama / 48.81 / 121.80 / Hartzell / yes
WA / North Cascades / Sholes / 48.81 / 121.77 / Hartzell / yes
WA / North Cascades / Rainbow / 48.80 / 121.78 / Hartzell / yes
WA / North Cascades / Roosevelt / 48.79 / 121.83 / Tynen (1970) / yes
WA / North Cascades / Coleman / 48.78 / 121.85 / Hartzell / yes
WA / North Cascades / Lower Curtis / 48.78 / 121.80 / Tynen (1970), Hartzell / yes
WA / North Cascades / McMillan South / 48.77 / 121.27 / Hartzell / yes
WA / North Cascades / Boulder / 48.77 / 121.80 / Hartzell / yes
WA / North Cascades / No Name / 48.77 / 121.27 / Hartzell / yes
WA / North Cascades / Deming / 48.76 / 121.84 / Hartzell / yes
MO / Livingston / Grinnell / 48.75 / 113.72 / Hartzell / no
WA / North Cascades / Easton / 48.75 / 121.83 / Hartzell / yes
WA / North Cascades / Squak / 48.75 / 121.81 / Hartzell / yes
MO / Livingston / No Name, next to Siyeh / 48.74 / 113.66 / Hartzell / no
MO / Livingston / Siyeh / 48.74 / 113.65 / Hartzell / no
WA / North Cascades / Oaks West / 48.73 / 121.21 / Hartzell / yes
WA / North Cascades / Triumph Main / 48.70 / 121.35 / Hartzell / yes
WA / North Cascades / Colonial / 48.66 / 121.14 / Hartzell / yes
WA / North Cascades / Neve / 48.65 / 121.15 / Hartzell / yes
WA / North Cascades / North Klawatti / 48.57 / 121.10 / Hartzell / yes
WA / North Cascades / Klawatti / 48.56 / 121.10 / Tynen (1970), Hartzell / yes
WA / North Cascades / McAllister / 48.56 / 121.11 / Hartzell / yes
WA / North Cascades / Inspiration / 48.53 / 121.12 / Hartzell / yes
WA / North Cascades / El Dorado / 48.52 / 121.12 / Hartzell / yes
WA / North Cascades / Quien Sabe / 48.50 / 121.04 / Hartzell / yes
WA / North Cascades / Sahale / 48.49 / 121.04 / Hartzell / yes
WA / North Cascades / Mix-up / 48.45 / 121.06 / Hartzell / yes
WA / North Cascades / Cache Col / 48.45 / 121.05 / Hartzell / yes
WA / North Cascades / Le Conte / 48.36 / 121.04 / Tynen (1970) / yes
WA / North Cascades / South Cascade / 48.36 / 121.06 / Tynen (1970) / yes
WA / North Cascades / Suiattle / 48.08 / 121.09 / Hartzell / yes
WA / North Cascades / Honeycomb / 48.08 / 121.05 / Hartzell / yes
WA / North Cascades / Whitechuck - North / 48.08 / 121.11 / Hartzell / yes
WA / North Cascades / Whitechuck / 48.06 / 121.10 / Hartzell / yes
WA / North Cascades / White River / 48.06 / 121.10 / Hartzell / yes
WA / North Cascades / Wilman / 47.97 / 121.36 / Hartzell / yes
WA / North Cascades / Columbia / 47.97 / 121.35 / Hartzell / yes
WA / Olympics / Snow Dome / 47.81 / 123.71 / Gudger (1923), Tynen (1970), Hartzell / yes
WA / Olympics / Blue / 47.81 / 123.69 / Tynen (1970), Hartzell / yes
WA / Olympics / Hoh / 47.80 / 123.67 / Tynen (1970), Hartzell / yes
WA / Olympics / Hume / 47.79 / 123.65 / Tynen (1970) / yes
WA / North Cascades / Lynch / 47.57 / 121.18 / Hartzell / yes
WA / North Cascades / Daniels / 47.57 / 121.18 / Hartzell / yes
WA / North Cascades / Ice Worm / 47.56 / 121.16 / Hartzell / yes
WA / North Cascades / Emmons / 46.86 / 121.72 / Tynen (1970) / yes
WA / North Cascades / Muir / 46.83 / 121.73 / Tynen (1970) / yes
WA / North Cascades / Paradise / 46.82 / 121.71 / Tynen (1970), Hartzell / yes
WA / North Cascades / Nisqually / 46.81 / 121.74 / Tynen (1970), Hartzell / yes
WA / North Cascades / Williwakas / 46.81 / 121.71 / Hartzell / yes
WA / North Cascades / Paradise Disconnect / 46.81 / 121.72 / Hartzell / yes
OR / South Cascades / Crater / 45.37 / 121.70 / Hartzell / no
OR / South Cascades / Palmer / 45.37 / 121.70 / Hartzell / no
OR / South Cascades / Zigzag Main / 45.37 / 121.70 / Hartzell / no
OR / South Cascades / White River / 45.35 / 121.70 / Hartzell / no
OR / South Cascades / Zigzag South / 45.35 / 121.72 / Hartzell / no
OR / South Cascades / Black Fin Disconnect / 44.16 / 121.79 / Hartzell / yes
OR / South Cascades / Black Fin / 44.16 / 121.79 / Hartzell / yes
CA / South Cascades / Bolum / 41.42 / 122.20 / Hartzell / no
CA / South Cascades / Hotlum / 41.42 / 122.19 / Hartzell / no
CA / Sierra / No Name 2 (No longer exists) / 37.94 / 119.29 / Hartzell / no
CA / Sierra / No Name 3 (No longer exists) / 37.94 / 119.29 / Hartzell / no
CA / Sierra / No Name 1 (No longer exists) / 37.94 / 119.28 / Hartzell / no
CA / Sierra / No Name 4 (No longer exists) / 37.93 / 119.29 / Hartzell / no
CA / Sierra / No Name 5 / 37.93 / 119.27 / Hartzell / no
CA / Sierra / Gaylor / 37.92 / 119.27 / Hartzell / no

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