Fig 5 - uploaded by Tamás Pócs
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Radula camerunensis Pócs et Döbbeler.-A = Male branch with a gemma bearing enlarged lobus. B = Capsule valves. C = Perianth mouth. D = Relatively small, young perianth. All drawn from the type.
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Citations
... With ca. 250 currently accepted extant species, Radula is one of the largest genera of liverworts (Yamada, 2003;Promma and Chantanaorrapint, 2015;Söderström et al., 2016;Zhang and Zhu, 2016;Pócs, 2017;Promma et al., 2018) and widely distributed from Arctic to Antarctic regions, with a center of species diversity in humid tropical to warm temperate environments (Devos et al., 2011a(Devos et al., , 2011b. ...
With ca. 250 extant species, Radula is one of the largest genera of the Porellales and the sole extant genus of the leafy liverwort family Radulaceae, widely distributed around the world. The earliest fossils of Radula were described from mid-Cretaceous Kachin amber of Myanmar, namely R. cretacea and R. heinrichsii. Here, we report two new exquisitely preserved specimens of R. heinrichsii from Kachin amber, yielding new morphological characters for an extended description of this taxon. Cladistic analysis based on a matrix of fourteen morphological characters and a molecular backbone constraint suggests its close relationship with extant species of Radula subgenus Amentuloradula. But due to distinctive morphological characters in R. heinrichsii and the younger estimated age for the crown group, it is likely that R. heinrichsii represents a stem group of the subgenus. The genus Radula is characterized by a high degree of morphological homoplasy, which makes the assignment of fossils to this extant taxon difficult and requires profound knowledge of the morphology of fossils.
... Epiphyllae (Devos et al. 2011;Patiño et al. 2017;Renner et al. 2013c) were only based on five epiphyllous species, the preliminary molecular evidence supported the hypothesis that epiphyllous species were grouped in a highly supported monophyletic clade. Pócs (2017) accepted the status of sect. Epiphyllae, and placed R. yanoella R.M.Schust. ...
... (Schuster 1991), R. grandilobula Promma et Chantanaorr. (Promma & Chantanaorrapint 2015), and R. camerunensis Pócs et Döbbeler (Pócs 2017) in this section. The same proposal was also made for R. hainanensis L.N.Zhang et R.L.Zhu . ...
Radula deflexilobula Promma, L.N.Zhang et R.L.Zhu is described and illustrated as a new species from Thailand. This species is distinctive in 1) the presence of dimorphic leaf lobules that are subrhombic and strongly reflexed on pendulous shoots, subquadrate and not reflexed on creeping shoots; 2) leaf lobules covering the stem ca. 1/3-1/2 of the stem-width, not auriculate at base, and 3) leaf cells thin walled with indistinct trigones and smooth cell surface. Our phylogenetic analyses based on three chloroplast regions (trnG, trnL-F, atpB-rbcL) confirm that this new species belongs to subg. Radula and is sister to R. decurrens Mitt. known from Fiji.
