Critical morphological study of the type of Leiomitra robusta (Steph.) R.M.Schust. (≡ Trichocolea robusta Steph.) showed that L. robusta is conspecific with L. paraphyllina Spruce. The former ...species is proposed as a synonym of the latter. Mexican plants previously reported as T. robusta were also examined and appeared to belong to L. paraphyllina as well, confirming results of previous authors. The latter species is widely distributed in Central and South America. A worldwide key to the species of Leiomitra is provided.
Detailed morphological descriptions of a little-known Japanese species, Riccia wichurae Steph. are given based on the type specimen. SEM images of the spores are also provided for the first time. ...The species is mainly characterized by 0.6–1.0 mm wide thalli with deep median grooves, lacking air chambers, purple or hyaline ventral scales, and large spore size (75–)80–90(–100) μm with irregular thickened wing margins. The author proposes that the species should be treated as a synonym of R. beyrichiana Hampe ex Lehm. which is widely distributed in Japan.
Type materials of Central and South American little-known species in the family Trichocoleaceae are critically reviewed. On the basis of the presence of perianths Trichocolea brevifissa Steph. and ...T. sprucei Steph. are newly included in the genus Leiomitra Lindb.: L. brevifissa (Steph.) T.Katag. and L. sprucei (Steph.) T.Katag. Trichocolea floccosa Herzog & Hatcher from Costa Rica is newly synonymized with L. sprucei. The worldwide key to the species of Leiomitra is given for the first time.
The fossil liverwort Hepaticites oishii from the Momonoki Formation in Western Honshu, Japan is critically reviewed. The type material exhibits the following characteristics: (1) small thalloid ...plants with well-defined midrib and lamina; (2) regularly dichotomously branching habit; (3) attenuate apical part of thallus with unnotched apex; (4) lack of ventral scales; (5) undulate lamina and margin of thallus without marginal teeth or hair; and (6) presence of rhizoids on midrib. These characters suggest an affinity of H. oishii to members of simple thalloid liverworts, particularly Pallaviciniales (Jungermanniopsida, Marchantiophyta). The species is therefore assigned to the fossil genus Pallaviciniites with a new combination: Pallaviciniites oishii (Huzioka & Takahasi) T. Katag. This liverwort fossil is significant because it constitutes the first fossil record of the order Pallaviciniales from the Late Triassic of Eurasia and is the second-oldest fossil liverwort in East Asia after Riccardiothallus devonicus from China.
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Type material of two Australian species: Trichocolea minutifolia Steph. and T. wattsiana Steph. is critically reviewed. On the basis of morphological observations both species are considered to be ...conspecific with T. hatcheri E.A.Hodgs., a species distributed in Australia and New Zealand. Detailed descriptions and illustrations based on the holotype are also provided for T. rigida R.M.Schust., the species newly confirmed on Macquarie Island. The worldwide key to the species of Trichocolea is given for the first time.
Eleven bryophyte fossils from the Pleistocene of the Shiobara Group, Tochigi Prefecture, were studied using a stereo microscope. Based on the detailed morphological observations, eight moss species ...and three liverwort species were identified. Mosses include Plagiomnium maximoviczii（Lindb.） T.J.Kop., a species of Calliergon, a species of Amblystegiaceae, a species of Polytrichaceae, a species of Dicranaceae, and three species of Hypnobryales. Liverworts include Odontoschisma fluitans（Nees） L.Söderstr. & Vá㶡a, a species of Jungermanniales, and a species of Marchantiales. It is interesting to find the inclusion of the species that grow around wet habitats such as P. maximoviczii, a species of Calliergon, a species of Amblystegiaceae and O. fluitans. We consider that this reflects the bryoflora of the lakeside of Pleistocene Shiobara Lake.
Schistochila yakushimensis N.Ohnishi & Deguchi is newly synonymized with S. sciurea (Nees) Schiffn. based on molecular phylogenetic analysis using the Thai plants of S. yakushimensis and on ...morphological observations for both species. A key to the species of Schistochila in Japan is provided.
Plagiochila alaskana A.Evans has been considered as an extreme form of P. semidecurrens (Lehm. & Lindenb.) Lindenb. and also recognized as a variety: P. semidecurrens var. alaskana (A.Evans) Inoue. ...After studying the holotype of P. alaskana the authors are of the opinion that P. alaskana should be considered as an independent species and not as a variety under P. semidecurrens. Study of the holotype specimen of a further taxon in this group, Plagiochila semidecurrens var. longifolia Inoue reveals leaf length : width ratios ranging from 1.5–2.5 : 1.0 which in turn supports the view of it being a habitat modification of P. semidecurrens. Therefore, we are of the opinion that var. longifolia should be treated as a synonym under P. semidecurrens as proposed by Inoue.
Morphological descriptions and taxonomic discussion of a liverwort species from New Zealand, Trichocolea elegans Colenso, are provided, with illustrations based on the lectotype newly designated in ...the present study. T. elegans Colenso is similar to Trichocolea hatcheri E.A.Hodgs. in having (1) small-sized plants of 0.8–1.2 cm wide including branches, (2) leaf discs 2–3 cells high bearing superficial cilia on marginal parts on the abaxial face, (3) dilated septa of leaf cilia, and (4) evenly thickened walls at the distal ends of terminal cells of cilia, and these species are indistinguishable from each other. In accordance with Hodgson’s treatment, T. elegans Colenso should be treated as a synonym of T. hatcheri.
