Calypogeia neesiana (C. Massal. et Carestia) Muell .Frib., Verh. Bot. Vereins Prov. Brandenburg 47: 320. 1905.

Bakalin, Vadim A., Klimova, Ksenia G. & Nguyen, Van Sinh, 2020, A review of Calypogeia (Marchantiophyta) in the eastern Sino-Himalaya and Meta-Himalaya based mostly on types, PhytoKeys 153, pp. 111-154 : 111

Calypogeia neesiana (C. Massal. et Carestia) Muell.Frib., Verh. Bot. Vereins Prov. Brandenburg 47: 320. 1905.

Basionym.

Kantius trichomanis var. neesianus C. Massal. et Carestia, Nuovo Giorn. Bot. Ital. 12 (4): 351. 1880.

Original material.

Italia, Rive Valsesia; not seen.

Remarks.

The species was described from the Italian Alps ( Massalongo and Carestia 1880) and later found as a sub-circumpolar (distinctly more common in amphi-oceanic areas) boreal and mainly montane species. The area of the taxon largely overlaps that of C. integristipula , although C. neesiana seems to be much rarer than the former, more inclined to inhabit decaying wood and slightly more southern in distribution (reaching to Japan and the Korean Peninsula; in both these sites, it is represented by Calypogeia neesiana subsp. subalpina (Inoue) Inoue). The species likely occurs in Northeast China; however, it has not been recorded there. The reports of the species from the southern half of China (Anhui, Jiangxi, Taiwan, and Yunnan, cf. Wang et al. 2011, Piippo et al. 1997, Fang et al. 1998; Piippo 1990) are at least partly based on Calypogeia cordistipula (synonymized with C. neesiana by Piippo et al. 1997) - another taxon accepted here with species status. Therefore, we doubt the occurrence of this species in the Sino-Himalaya and expect at least some of these records to be referred to C. cordistipula .