Browsing by Subject "ITS"

Now showing 1 - 5 of 5
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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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    Integrative taxonomy reveals hidden diversity in the Aloina catillum Complex (Pottiaceae, Bryophyta)
    (MDPI, 2024-02-02) Martínez, Mónica; Hedenäs, Lars; Rodríguez, Omar; Cano Bernabé, María Jesús; Gallego Morales, María Teresa; Guerra Montes, Juan; Jiménez Fernández, Juan Antonio; Biología Vegetal
    Aloina catillum is a variable moss typical of xerophytic environments in the Neotropics, characterized against other closely allied Aloina species with well-differentiated leaf border by its setae twisted to the left throughout. In order to clarify its variability and its relationships with the allied species with differentiated leaf border A. brevirostris, A. obliquifolia, and A. rigida, we performed an integrative study including sequence data from four markers (nuclear ITS, plastid atpB-rbcL, trnG, trnL-F), morphometry, and species assembling by automatic partitioning (ASAP) algorithm. Our data suggest that A. catillum consists of at least three species: A. calceolifolia (an earlier name for A. catillum), and two species described here as a new, A. bracteata sp. nov. and A. limbata sp. nov. This latter species includes the specimens previously identified as A. obliquifolia from South America. Additionally, some morphological and molecular variability was also detected in A. limbata, but was not consistent enough to be recognized taxonomically. The study supports the presence of A. brevirostris in the Neotropics and A. rigida is tentatively excluded from South America. Full descriptions of the A. catillum s.l. species and a diagnostic key to this complex in South America are provided.
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    Schistidium convergens (Grimmiaceae, Bryophyta), a new species from southern Spain and Morocco
    (Schweizerbart Science Publishers, 2019-04-25) Jiménez-Martínez, Juan F.; Alonso García, Marta; Cano Bernabé, María Jesús; Gallego Morales, María Teresa; Guerra Montes, Juan; Biología Vegetal
    Schistidium convergens is described as a new species from southern Spain and northern Morocco, based on morphological and molecular data. The species is fully described and illustrated, its affinities are discussed in detail, and its current distribution mapped. The species is distinguished morphologically by its usually smooth leaf margins, sometimes with short papillae towards the leaf apex, recurved from the leaf base to the apex on both sides, rectangular basal leaf cells, quadrate to short-rectangular, subhyaline basal marginal cells with slightly thickened transverse walls, and irregular, isodiametric, quadrate to short rectangular, sometime oblate distal and medial exothecial cells. A table with characters to distinguish this species from S. apocarpum, the morphologically most similar species, and a phylogenetic analysis in order to detect relationships of the new species with nearby taxa based on the rDNA ITS region are provided. The new species is located in a clade with S. confertum, S. marginale and S. frigidum, among others.
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    SURROGATES: Virtual OBUs to Foster 5G Vehicular Services
    (2019) Santa Lozano, J.; Fernández Ruiz, Pedro Javier; Ortiz Murillo, J.; Skarmeta Gomez, A. F.; Sánchez Iborra, Ramón Jesús; Ingeniería de la Información y las Comunicaciones
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    Untangling Pseudocrossidium crinitum s. l. (Pottiaceae, Bryophyta) through molecular and morphometric analysis
    (Schweizerbart Science Publishers, 2016-02-01) Jiménez, Juan F.; Alonso García, Marta; Cano Bernabé, María Jesús; Jiménez Fernández, Juan Antonio; Biología Vegetal
    Pseudocrossidium crinitum, a dioicous moss distributed mainly in the Southern Hemisphere, has been treated as a single species, in spite of its phenotypical variability. Morphometric methods (PCA; DA) based on quantitative characters and molecular variation using plastid regions trnL-F and trnG of this species, as presently circumscribed, were analyzed. The results suggest that this putative taxon consists of at least five different species, which could belong to different lineages in Pottiaceae. They are Pseudocrossidium crinitum, the neglected P. carinatum, and Barbula santiagensis and two names resurrected from synonymy, Barbula arenicola, and B. flagellaris var. denticulata, which are here combined in Pseudocrossidium.