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In order to maintain a stable nomenclature, we propose conserving I Colurolejeunea tenuicornis i , the basionym of I Colura tenuicornis i , against I Lejeunea ceratophora i , the basionym of I Colura ceratophora i . I Colura tenuicornis i is the name that has been widely and persistently used for this taxon for almost 70 years. [Extracted from the article]

A new species from Fiji, Lejeunea heinrichsii is described and illustrated herein based on morphological characters and molecular phylogenetic analyses. The taxonomic descriptions of L. heinrichsii and the comparison with their allies are presented, together with the Maximum Likelihood (ML) and Bayesian phylogenetic analyses based on sequences of two chloroplast regions (trnL‐trnF, rbcL) and the nuclear ribosomal ITS region. This delicate and rather minute species is characterized by its autoicy, eplicate perianths, the oblong‐rectangular leaf lobes, the distantly arranged underleaves with lobes to 1/2‐2/3 underleaf length, and the leaf cells without well‐developed trigones and intermediate thickenings. In the molecular phylogeny, L. heinrichsii is placed sister to the Asian L. compressiuscula from Indonesia and forms an independent lineage including accessions of Neotropical L. adpressa from the Dominican Republic and the widespread Palaeotropical L. anisophylla from São Tomé and Príncipe. Morphologically, L. heinrichsii is very similar to L. capensis, however the result based on the molecular phylogenetic analyses revealed that the two species are very distinct. [ABSTRACT FROM AUTHOR]

The evolutionary history and classification of epiphyllous cryptogams are still poorly known. Leptolejeunea is a largely epiphyllous pantropical liverwort genus with about 25 species characterized by deeply bilobed underleaves, elliptic to narrowly obovate leaf lobes, the presence of ocelli, and vegetative reproduction by cladia. Sequences of three chloroplast regions ( rbcL, trnL-F, psbA) and the nuclear ribosomal ITS region were obtained for 66 accessions of Leptolejeunea and six outgroup species to explore the phylogeny, divergence times, and ancestral areas of this genus. The phylogeny was estimated using maximum-likelihood and Bayesian inference approaches, and divergence times were estimated with a Bayesian relaxed clock method. Leptolejeunea likely originated in Asia or the Neotropics within a time interval from the Early Eocene to the Late Cretaceous (67.9 Ma, 95% highest posterior density [ HPD]: 47.9-93.7). Diversification of the crown group initiated in the Eocene or early Oligocene (38.4 Ma, 95% HPD: 27.2-52.6). Most species clades were established in the Miocene. Leptolejeunea epiphylla and L. schiffneri originated in Asia and colonized African islands during the Plio-Pleistocene. Accessions of supposedly pantropical species are placed in different main clades. Several monophyletic morphospecies exhibit considerable sequence variation related to a geographical pattern. The clear geographic structure of the Leptolejeunea crown group points to evolutionary processes including rare long-distance dispersal and subsequent speciation. Leptolejeunea may have benefitted from the large-scale distribution of humid tropical angiosperm forests in the Eocene. [ABSTRACT FROM AUTHOR]

Aim How disjunct distributions arise and why organisms differ in diversification patterns remain some of the most compelling fundamental questions in biogeography. We carry out phylogeographical analyses of the pantropical liverwort genus Ceratolejeunea to identify its geographical origin and the dispersal routes by which it gained its Neotropical-African disjunction. Furthermore, we investigate whether there is geographical structure in Ceratolejeunea on islands and whether island diversity is a result of radiations or recurrent migration. Location America, Africa and Australasia. Methods Sequences of two chloroplast regions ( trnL- F, rbcL) and the nuclear ribosomal ITS region were obtained for 55 accessions of 20 species to explore the phylogeny, divergence times and ancestral areas of Ceratolejeunea. The phylogeny was reconstructed using maximum likelihood and Bayesian inference approaches, and divergence times were estimated with a Bayesian relaxed clock method and fossil and secondary calibrations. Ancestral areas were estimated using BioGeoBEARS. Results Ceratolejeunea likely originated in the Neotropics during the Palaeogene (42.2 Ma, 95% HPD: 22.2-64.8) and the initial diversification of its crown group took place between the Eocene and Miocene (25.5 Ma, 95% HPD: 16.6-35.8). Although boreotropical migration and subsequent extinction in northern regions cannot be rejected, the observed disjunctions are best explained by four transoceanic dispersal events from the Neotropics to Africa during the late Oligocene to Pleistocene. Geographical structure is prevalent on islands, particularly in the C. cornuta complex. Three species and the subgenus Ceratolejeunea are recovered as paraphyletic. Main conclusions Widespread paraphyly and sister group relationships between disjunct taxa indicate an important role of cryptic speciation and transoceanic dispersal with subsequent genetic differentiation in the evolution of Ceratolejeunea. On islands, recurrent migration, rather than radiation, has shaped bryophyte diversity. [ABSTRACT FROM AUTHOR]

I Metzgeriopsis i is a monospecific genus from Asia described by Goebel (in Ann. I Metzgeriopsis i (K.I. Goebel) Pócs) is four years older than the generic name I Cololejeunea i (Spruce) Steph. and therefore has priority. However, accepting the priority of I Metzgeriopsis i would require the transfer of several hundred species names currently accepted in I Cololejeunea i . [Extracted from the article]

Lepidolejeunea is a largely epiphytic, pantropical genus of leafy liverworts. While the phylogenetic position of Lepidolejeunea has been the subject of recent molecular investigations, the relationships within this genus have been little studied. We employed sequences of two chloroplast regions (trnL–trnF, rbcL) and the nuclear ribosomal ITS region from 32 accessions of Lepidolejeunea to reconstruct its phylogeny. Two accessions of Rectolejeunea were used as outgroup. Maximum parsimony and likelihood analyses indicate that the diversity of Lepidolejeunea is underestimated by current morphological classification, and that Lepidolejeunea involuta consists of two independent entities, Lepidolejeunea involuta s.str. and Lepidolejeunea cuspidata comb. nov. Despite being treated as synonymous in earlier studies, both species nest in different main clades of Lepidolejeunea. Lepidolejeunea involuta belongs to L. subg. Kingiolejeunea which includes species with ocelli of the same size as the surrounding leaf cells. Lepidolejeunea cuspidata instead belongs to the recircumscribed L. subg. Perilejeunea which includes species having ocelli of at least partly smaller size than the surrounding leaf cells. Lepidolejeunea auriculata is introduced as a new species based on molecular and morphological evidence. Our results highlight the need for integrative taxonomic studies to clarify the status of many binomials within Lejeuneaceae. They also suggest that as integrative approaches are applied across liverworts estimates of global diversity will be revised upwards. [ABSTRACT FROM AUTHOR]

Author information LS, https://orcid.org/0000-0002-9315-4978 AH, https://orcid.org/0000-0001-8390-319x TP, https://orcid.org/0000-0002-1359-1298 Acknowledgement We thank John McNeill and John Wiersema for valuable comments on the proposal. To avoid further confusion with the use of I Aphanolejeunea angustissima i Steph. we propose to reject the name outright instead of "moving" the name from one possible later synonym to another. [Extracted from the article]