Abundance: 0.00 to 36.46% (median 3.01%)

Latitudinal range: 27.0° to 39.7°

Habitats: (10) only

Found in 10 samples

Mexico: El Zurdo

Spain: Cueva de Nerja (Tardiglacial), Bolomor Cave (Level XI), Bolomor Cave (Level IV)

United States: Fort Center Mound A, Coffey (Horizon III-5, KSU), Coffey (Horizon III-5, 1972-73), Jones, Sunshine Locality (Unit C), Sunshine Locality (Unit E)

See also Aythya, Aythya affinis, Aythya americana, Aythya collaris, Aythya ferina, Aythya marila, Aythya nyroca, Aythya spp.