Browsing by Subject "Pottiaceae"

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    Circumscription and phylogenetic position of two propagulose species of Syntrichia (Pottiaceae, Bryophyta) reveals minor realignments within the tribe Syntricheae
    (MDPI, 2022-02-25) Cano Bernabé, María Jesús; Gallego Morales, María Teresa; Guerra Montes, Juan; Jiménez Fernández, Juan Antonio; Biología Vegetal
    In the course of a worldwide revision of the genus Syntrichia, we identified problems in the circumscription of some species of the genus as well as among some allied genera grouped in the tribe Syntricheae. This is the case for the two propagulose Syntrichia amphidiacea and S. gemmascens, closely related to Streptopogon. We analyzed phylogenetic relationships between these species, based on nuclear (ITS) and two plastid (trnL-F and trnG) markers and morphological features. Species delimitation using molecular data was consistent with our preliminary morphological inference. Phylogenetic analyses were performed using maximum likelihood and Bayesian inference methods. Our results placed Syntrichia amphidiacea in the Streptopogon clade. Syntrichia gemmascens is also included in Streptopogon in spite of the discrepancy of the ITS and plastid relationships, which could be evidence of an exchange of genetic material between species in various lineages in the Pottioideae. Streptopogon is maintained as a separate genus on the basis of morphology characters, and we consider the differentiation of laminal papillae and the presence of a stem central strand as new characters in the genus. We accept Sagenotortula as distinct genus sister to Syntrichia. We consider the lack of costal dorsal epidermis and the differentiation of a crescent-shaped costal dorsal stereid band as distinctive generic characters in Syntrichia. Additionally, we include Syntrichia percarnosa as a new synonym for S. breviseta. Three names are lectotypified.
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    Taxonomic revision of Chiololoma (Pottiaceae, Bryophyta)
    (Missouri Botanical Garden Press, 2019-11-18) Alonso García, Marta; Cano Bernabé, María Jesús; Jiménez Fernández, Juan Antonio; Biología Vegetal
    A worldwide taxonomic revision of the species belonging to the moss genus Chionoloma Dixon (Pottiaceae) is here presented. Our work is based on the morphological analysis of more than 2600 specimens deposited in different herbaria or collected during field trips. A total of 131 names were found and their nomenclatural types were examined, resulting in the lectotypification of 45 names. It is concluded that Chionoloma is composed of 22 species and one variety, seven of them are here newly combined (C. circinatum (Besch.) M. Alonso, M.J. Cano & J.A. Jiménez; C. cylindrotheca (Mitt.) M. Alonso, M.J. Cano & J.A. Jiménez; C. hyalinoblastum (Broth.) M. Alonso, M.J. Cano & J.A. Jiménez; C. melanostomum (Mitt.) M. Alonso, M.J. Cano & J.A. Jiménez; C. orthodontum (Müll. Hal.) M. Alonso, M.J. Cano & J.A. Jiménez; C. sarawakense (Dixon) M. Alonso, M.J. Cano & J.A. Jiménez; and C. stenocarpum (Thér.) M. Alonso, M.J. Cano & J.A. Jiménez). Moreover, 42 names are newly synonymized and a total of 74 new records for various countries are reported. Keys, descriptions, illustrations, photographs, and distribution data of each species are provided.