Faculty of Biological Sciences, Juarez University of the State of Durango (UJED), 35010 Gmez Palacio, Durango, Mexico..
Institute of Ecology, Odum School of Ecology, University of Georgia, Athens, GA 30602-2202, USA. .
Zootaxa. 2022 Aug 2;5169(5):472-480. doi: 10.11646/zootaxa.5169.5.5.
A new monotypic genus of freshwater snail from late Holocene spring deposits in Viesca, Coahuila (Mexico), is described based on shell morphology. Spinopyrgus luismaedai n. gen. et n. sp. has two to three carinate shells with long and wide shovel-shaped spines, strong axial ridges and a pointed protoconch. All sculptural ornamentations on the teleoconch are part of the calcareous shell material and not projections of the periostracum. This combination of shell features and their almost marine-like appearance is unknown among North American recent and fossil freshwater snails. Because of its shell characteristics, we placed the new genus tentatively in the Cochliopidae. The springs of Viesca dried up in the second half of the 20th century so that any living occurrence of this species in neighboring areas is unlikely, rendering the new genus and species possibly extinct.
一种新的单种淡水蜗牛属，来自科阿韦拉州维塞卡晚全新世泉沉积物，基于壳形态描述。Spinopyrgus luismaedai n. gen. et n. sp. 具有两到三个有脊的壳，带有长而宽的铲形刺，强烈的轴向脊和尖锐的原壳。贝壳上的所有雕塑装饰都是钙质壳材料的一部分，而不是外皮的突起。这种贝壳特征的组合及其几乎类似海洋的外观，在北美现代和化石淡水蜗牛中是未知的。由于其壳特征，我们暂时将新属归入 Cochliopidae 科。维塞卡的泉水在 20 世纪下半叶干涸，因此在邻近地区不太可能有这种物种的任何现存出现，这使得新属和新种可能已经灭绝。
