Lejeunea pocsii RMSchust. is a heterotypic synonym of L. helmsiana (Steph.) Steph. (Lejeuneaceae, Marchantiophyta)

摘要

Two names, Lejeunea helmsiana and L. pocsii, are currently applied to New Zealand Lejeunea that possess the following three characters: a multicellular first lobule tooth, an inflated lobule carinal region, and pentacarinate perianth. To explore whether the recognition of two species is warranted we searched for size and shape differences in underleaves and lobules among nine individual:; with these three characters. Cluster analysis identified three groups on the basis of size data, and two on the basis of shape. There was no concordance between cluster membership and individual membership for modules, which is evidence a against the existence of more than one taxon. Allometric data describe it relationship that appears to account for differences between types of L. helmsiana (Steph.) Steph. and L. pocsii R.M.Schust. Here we formally reject the hypothesis that the names L. helmsicina and L. pocsii apply to separate evolutionary entities, and accordingly synonymise L. pocsii with L. helmsiana.