Guide to Liverworts of Oregon: Mesoptychia bantriensis (Hook.) L. Söderstr. & Váňa
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Lophozia 1b oil bodies less than 12 per cell > Lophozia 5b leaves bilobed > Lophozia 8a underleaves present > Lophozia 9b gemmae absent > Lophozia 10a dioicous > Lophozia 11a midleaf cells 35-40 μm > Lophozia bantriensis
Synonym: Lophozia bantriensis (Hook.) Steph.; Leiocolea bantriensis (Hook.) Joerg.
Special Status: Special status probably warranted pending further knowledge of its occurrence in Oregon.
Recognition: A relatively large dilophozia with small underleaves consistently present. It is dioicous and lacks gemmae.
Distribution: Grows on wet soil, rocks, or among mosses (Paton 1999); in Oregon known only from a historical Foster collection, Estacada, Oregon.
Comments: Source of the only Oregon record is a literature comment, "The type of Acrobolbus septentrionalis Steph. (Estacada, Ore., Foster 8-7-1904) is unquestionably L. bantriensis, of the form with obtuse leaf lobes. The sinuses are occasionally feebly gibbous and the leaves may be feebly falcate, because of the curvature of the unusually larger ventral lobe. The underleaves are small but distinct, almost never lobed, but bear 1-2 short basal cilia ending in slime papillae. Median cells range from 35-40 X 45-55 μm and possess the large trigones and papillose cuticle of L. bantriensis" (Schuster 1969, p. 391). This specimen is illustrated by Schuster in the same place (1969, p. 390).
Sotler and Crandall-Stotler (2017) recognize the enlarged circumscription of Mesoptychia that includes Leiocolea bantriensis as proposed by Váňa et al. (2012).