Figures 18-24 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 18-24 SEM images of Phreatoviesca spinosa gen. nov. et sp. nov. 18 shell apex with protoconch, UJMC 508 19 paratype 3, shell apex with protoconch, UJMC 503 20 shell apex with protoconch, UJMC 510 21 paratype 1, apex with protoconch, UJMC 501 22 smooth specimen with body whorl shows irregular, strong marked growth lines, UJMC 508 23 paratype 1, body whorl shows irregular, strong marked growth lines, UJMC 501 24 paratype 2, body whorl shows regularly spaced shovel-shaped spines, UJMC 502.