Person:
Medina Bujalance, Rafael

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First Name
Rafael
Last Name
Medina Bujalance
URI
https://hdl.handle.net/20.500.14352/74313
Affiliation
Universidad Complutense de Madrid
Faculty / Institute
Ciencias Biológicas
Department
Biodiversidad, Ecología y Evolución
Area
Botánica
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2010 - 20194
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Author: Vicente Mazimpaka × Start date: 2010 ×

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Now showing 1 - 4 of 4
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    Unnoticed diversity within the disjunct moss Orthotrichum tenellum s.l. validated by morphological and molecular approaches
    (Taxon, 2013) Medina Bujalance, Rafael; Francisco Lara; Bernard Goffinet; Ricardo Garilleti; Vicente Mazimpaka
    Transoceanic disjunctions are thought to be common in species of bryophytes. While much effort focuses on identifying the causes of these disjunctions, few studies test the assumption that the disjunct populations are conspecific. The moss Orthotrichum tenellum is considered to be disjunct between western North America and the western Old World. A thorough morphological revision together with molecular analyses using four plastid (atpB-rbcL, rps4, trnG, trnL-F) and two nuclear loci (adk, ort-LFY) reveals that this putative taxon is composed of six well-supported species, each of them diagnosable by morphological and phylogenetic criteria. Furthermore, these species, which were previously treated as a single, morphologically variable taxon, belong to different lineages within the genus and are the result of separated evolutionary histories. Only two of them (O. tenellum s.str., O. norrisii) are sister species that may have resulted from speciation following a transatlantic disjunction. Today, all species are either restricted to the Old World (i.e., O. tenellum s.str., O. comosum sp. nov.) or endemic to North America (i.e., O. coulteri, O. norrisii, O cucullatum sp. nov., O. franciscanum sp. nov.). This work emphasizes the relevance of integrative approaches to solve taxonomic problems and to provide more solid bases for biodiversity assessment.
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    Epiphytic bryophytes in harsh environments: theJuniperus thuriferaforests
    (Journal of Bryology, 2010) Medina Bujalance, Rafael; Francisco Lara; Belén Albertos; Isabel Draper; Ricardo Garilleti; Vicente Mazimpaka
    The forests of Juniperus thurifera are peculiar ecosystems that typically grow on mountains and highplateaux of the western Mediterranean basin with dry and continental climates. Some previous surveys suggested that these forests house a rather distinctive epiphytic bryophyte flora. Epiphytic bryophyte communities were systematically sampled in 19 representative juniper forests, for the first time spanning all the distribution area of this conifer. The flora consists of 44 species (32 acrocarpous mosses, 10 pleurocarpous mosses and 2 liverworts). Orthotrichum species are the most frequent and abundant in most of the sampled localities, including some uncommon taxa such as Orthotrichum vittii which shows a clear association with J. thurifera. Epiphytic bryophyte communities on this species were highly homogeneous, although they can be arranged into different groups in response to environmental conditions. Typically, the epiphytic communities of the Mediterranean juniper forests comprise a distinct combination of xerophytic taxa that enhances the interest of these ecosystems and provides new fields for their research and conservation.
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    Orthotrichum pilosissimum (Orthotrichaceae), a new moss from arid areas of Nevada with unique axillary hairs
    (Bryologist, 2011) Medina Bujalance, Rafael; Francisco Lara; Vicente Mazimpaka; James R. Shevock; Ricardo Garilleti
    Orthotrichum pilosissimum is described from herbarium material and recently collected specimens in the state of Nevada. Its specific epithet refers to the diagnostic hyper-developed axillary hairs, which are frequently longer than 1 mm, multiseriate and branched, covering most of the stems surface and sometimes protruding from the foliose shoots. These hairs are not only unique in the genus but also among mosses, providing a reliable diagnostic character for the new taxon. Additional gametophytic and sporophytic characters that contribute to its taxonomic delimitation are also given.
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    On the priority of Orthotrichum cylindrocarpum over O. coulteri and Lesquereux's early vindication of an autonomous American bryology
    (Taxon, 2019) Medina Bujalance, Rafael; Francisco Lara; Bernard Goffinet; Ricardo Garilleti; Vicente Mazimpaka
    In a recent revision of the Orthotrichum tenellum complex, the authors erroneously concluded that the name O. coulteri predated the supposed synonym O. cylindrocarpum. This confusion was due to incongruent publication dates reported in the literature and lack of evidence of effective publication of the latter. Here, we demonstrate that the name O. cylindrocarpum was indeed published a few months before O. coulteri based on correspondence by the authorities and dated reprints. The almost simultaneous publication of both names occurred during a period in which some early American bryologists advocated that the discovery of new species from North America should be reported by them and not by their European colleagues.