Figures 14-17 from: Czaja A, Gladstone NS, Becerra-López JL, Estrada-Rodríguez JL, Sáenz‑Mata J, Hernández-Terán F (2021) A remarkable new genus and species of subterranean freshwater snail from a recently dried-up spring of Viesca, Coahuila, Northern Mexico. Subterranean Biology 39: 129-141. https://doi.org/10.3897/subtbiol.39.67799

Figures 14-17 SEM images of Phreatoviesca spinosa gen. nov. et sp. nov. 14 specimen with strong spines, UJMC 506 15 specimen with ribs, UJMC 507 16 specimen with smooth whorls, UJMC 508 17 specimen with smooth whorls, UJMC 509. Scale bar: 1 mm.