Solenostoma pseudopyriflorum, Bakalin & Vilnet, 2010

Váňa, Jiří, Söderström, Lars, Hagborg, Anders & Konrat, Matt Von, 2013, Notes on Early Land Plants Today. 44. Comments on sexuality in Solenostoma (Solenostomataceae, Marchantiophyta) and on some newly described taxa, Phytotaxa 152 (1), pp. 33-47 : 37

Solenostoma pseudopyriflorum / Solenostoma pyriflorum

The above discussion brings up the question of the taxonomy of the Solenostoma pseudopyriflorum / pyriflorum complex including Solenostoma rishiriense Amakawa (1956: 48) , which Bakalin & Vilnet (2010: 159) accepted as a separate species. Solenostoma pseudopyriflorum was separated by Bakalin & Vilnet (l.c.: 160) from Solenostoma pyriflorum on the basis of the paroicous inflorescence. In the same study they (l.c.: 160) stated “one of its striking features is an easy disintegration of antheridia and only loosely or almost not inflated base of male bracts”. Some of the specimens were formerly recorded as Solenostoma rishiriense ( Gambaryan 1992, Bakalin 2009a: 230) and Solenostoma pyriflorum (Váňa & Ignatov 2005, Bakalin 2009b:108). It should be mentioned that the identification of two specimens by the senior author (attributed to Solenostoma pseudopyriflorum by Bakalin & Vilnet 2010: 160) was based only on the fact that one specimen has only terminal androecia and the second one is fully sterile (at least the parts of specimens available for examination).

The separation of Solenostoma pseudopyriflorum is partly supported by molecular data (trnL-F cpDNA). In Bakalin & Vilnet (2010: 153) in both maximum parsimony and maximum likelihood phylogenetic trees Solenostoma pseudopyriflorum (5 specimens from Eastern Siberia) form a separate clade sister to a clade based on two specimens of Solenostoma pyriflorum from South Korea (from the same or nearly the same locality). Solenostoma pseudopyriflorum demonstrates “a stable and almost invariable sequence pattern over extensive territory of about 300 km, from Baikal to Kuril Islands” (l. c.: 155) and the “data support the segregation of Solenostoma pseudopyriflorum as a separate species distinct from S. pyriflorum .” It should be only mentioned that Solenostoma pseudopyriflorum replaces Solenostoma pyriflorum north of 40º N latitude. In the study Bakalin & Vilnet (2012: 570) used the combined trnL-F + trnG intron nucleotide sequence where Solenostoma pseudopyriflorum forms a separate basal clade in the major clade formed by Solenostoma pyriflorum , Solenostoma major ( Hattori 1950: 8) Bakalin & Vilnet (2012: 574) (= Solenostoma pyriflorum var. major (S.Hatt.) Bakalin (2009a: 230)) and “ Solenostoma sp. ”.