Cryptogamie, Bryologie 42 (2), 11-18, (12 February 2021) https://doi.org/10.5252/cryptogamie-bryologie2021v42a2
KEYWORDS: Schistochilaceae, liverworts, New Caledonia, morphology, Perssoniella, new species
Schistochila gradsteinii Thouvenot sp. nov., is added to the five Schistochila Dumort. species formerly known in New Caledonia. The new species is distinctive by the lack of underleaves, bilobed leaves entire margined, with larger ventral lobes oblong-lanceolate to oblong-ovate, apiculate, dorsal lobes oblong-ovate, inserted on the dorsal surface of ventral lobes, the free margins not reaching the ventral margins, leaf cells with seemingly 3-layered trigones, stems with a conspicuous epidermis. It shares with the endemic S. vitreocincta (Herzog) X.L.He & Glenny some features distinctive from the rest of the genus. In addition, the occurrence of S. vitreocincta is clarified, the gynoecium of S. integerrima Steph. is newly described and a key to the New Caledonian species of Schistochila is provided.