The Status of <I>Amblyolejeunea</I> (Lejeuneaceae) from Ecuador and Guadeloupe

Molecular and morphological evidence for a new species of liverwort, Lejeunea heinrichsii (Marchantiophyta: Lejeuneaceae) from Taveuni, Fiji

“…Similarly challenging was the existence of the generic rank of the two monotypic genera, Amblyolejeunea and Sphaerolejeunea . Amblyolejeunea fulfordiae Ast was originally described with the distinguishing characters of eplicate perianths, entire underleaves and large leaf lobules (Jovet‐Ast, ), however, these features were considered unstable and the former genus was synonymized under Lejeunea (Zhu & Cheng, ). In the morphological treatment of Sphaerolejeunea , Reiner‐Drehwald & Drehwald () postulated a sister relationship to Lejeunea based on morphological similarities but refrained from lowering the former with the latter genus.…”

Phylogenetic position of Oryzolejeunea (Lejeuneaceae, Marchantiophyta): Evidence from molecular markers and morphology

“…Although previous authors have proposed distant relationships between Oryzolejeunea and either Lejeunea (Bernecker‐Lücking, ; Gradstein et al, ) or Cheilolejeunea (e.g., Schuster, ), the molecular evidence presented in the present study clearly shows that Oryzolejeunea is nested within Lejeunea and does not deserve generic status. Recently, based on morphological evidence, many other genera, such as Amblyolejeunea (Zhu & Cheng, ), Amphilejeunea R. M. Schust., Cryptogynolejeunea R. M. Schust.…”

“…and Nees, and the Asiatic L. mimula Hürl. (Zhu & Cheng, ). The results of our molecular analysis indicate a close relationship between the type species of Oryzolejeunea and the neotropical L. catinulifera .…”

“…have been suggested (Schuster, , ; Bernecker‐Lücking, ). Gradstein et al () emphasized the close resemblance between O. saccatiloba and Amblyolejeunea fulfordiae Ast, the only species in the genus Amblyolejeunea Ast and currently considered a member of Lejeunea (Zhu & Cheng, ). In a broad morphological–phylogenetic analysis of the genera of Lejeuneaceae (Gradstein et al, ), Oryzolejeunea was recovered as a member of the Lejeuneeae clade together with 42 other genera, but its closer affinities remained unresolved.…”

Evidence for Species Recognition on the Basis of a Single Specimen: Nephelolejeunea carcharias sp. nov. (Lejeuneaceae: Jungermanniopsida)

“…Whether we can have confidence in species proposed on the basis of one or few individuals is a difficulty that transcends all modes of inference and all systematic data sources, including morphological and molecular data. This is problematic for studies of the Lejeuneaceae, wherein species are characteristically variable ( Reiner-Drehwald andGoda 2000 , Reiner-Drehwald 2005 ;Hartmann et al 2006 ), differences between species are often primarily quantitative (ReinerDrehwald and Schaefer-Verwimp 2008), and novel entities are often known from few specimens ( Grolle 1973( Grolle , 1980Thiers 1985 ) and in quantities that preclude molecular investigation (see for example Schuster 1984a ;Zhu and Cheng 2008 ).…”