- Helix devia A.A. Gould 1846 (1846–1850): 165.
- Helix baskervillei L. Pfeiffer 1850: 130.
Identification. Shell depressed-globose. Spire conical, sides slightly convex. Periphery rounded, medial. Whorls c. 5–6, convex. Suture moderately indented. Protoconch c. 1½ whorls, initially smooth, then granular. Teleoconch with low, coarse, irregular striae, wrinkled below suture, and fine, shallow spiral lines. Aperture subovate-lunate, wider than high. Apertural denticle in adults: parietal tooth long, curved. Umbilicus small, c. 1/12 of W, almost entirely overhung by columellar lip. Shell opaque, semi-matte, yellowish brown; lip and parietal denticle whitish. Shell toc. 19–26 mm wide (wider than high).
Comparison. This species is most like C. mullani but with a more raised spire.
Habitat. Unknown for BC but moist, lowland forests below 600 ft [180 m] in the USA (Vagvolgyi 1968).
Geographic range. Historically known in BC from Sumas Prairie in the Fraser Valley (Dall 1905) and Esquimalt on Vancouver Island (Taylor 1889), and more generally “Vancouver’s Island” (Pfeiffer 1850). Extreme south-western BC, south through western Washington to the Columbia Gorge, Oregon (Pilsbry 1940; Vagvolgyi 1968).
Etymology. Cryptomastix: derived from the Greek kryptos, hidden + mastix, flagellum. Devius (Latin), solitary or out of the way.
Remarks. This species was first reported from what was to become BC by Pfeiffer (1850), and it has not been seen alive in BC for many years and is presumed extirpated (COSEWIC 2002, 2013).
References
- COSEWIC (2002) COSEWIC assessment and status report on the Puget Oregonian snail Cryptomastix devia in Canada. Committee on the Status of Endangered Wildlife in Canada, Ottawa, Ontario, Canada, vi + 20 pp.
- COSEWIC (2013) COSEWIC Status Appraisal Summary on the Puget Oregonian Cryptomastix devia in Canada. COSEWIC, Ottawa, Ontario, Canada, xv pp.
- Dall WH (1905) Land and fresh water mollusks. Alaska Harriman Expedition. Volume 13. Doubleday, Page and Co., New York, New York, USA, 1–171, pls.
- Pfeiffer L (1850) Descriptions of twenty-four new species of Helicea, from the collection of H. Cuming, Esq. Proceedings of the Zoological Society of London for 1849 17: 126–131.
- Pilsbry HA (1940) Land Mollusca of North America (north of Mexico), Volume I, Part 2. The Academy of Natural Sciences of Philadelphia, Monographs 3: i–viii + 1–994 + i–ix.
- Taylor GW (1889) The land shells of Vancouver Island. The Ottawa Naturalist 3: 84–94.
- Vagvolgyi J (1968) Systematics and evolution of the genus Triodopsis (Mollusca: Pulmonata: Polygyridae). Harvard University, Museum of Comparative Zoology, Bulletin 136: 145–254.