Browsing by Subject "Africa"

Now showing 1 - 3 of 3
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    Fissidens eremicus (Fissidentaceae), a new pseudocryptic African–European species with dimorphic stems
    (Taylor and Francis Group, 2021-05-14) Martínez, Mónica; Cano Bernabé, María Jesús; Guerra Montes, Juan; Jiménez Fernández, Juan Antonio; Biología Vegetal
    Within Fissidens subgenus Fissidens, several species are distinguished in Europe. Some of them are easily identifiable by their morphological characters, and others by a combination of these characters and their sexual reproduction structures. The discovery in the south of the Iberian Peninsula of collections similar to F. viridulus (Sw.) Wahlenb. but with dimorphic fronds (male and female plants) like those of F. sublimbatus Grout suggests that an undescribed taxon exists in this region. Nuclear ITS sequences of four samples of this hypothetical new species from southern Spain and 28 specimens of other species of the subgenera Fissidens and Pachyfissidens were studied. Relationships between specimens were explored with maximum likelihood and Bayesian inference analysis. A morphological study comparing the material to F. sublimbatus was also made. Molecular data showed high support for the recognition of a new species that also presents some morphological differences from Fissidens sublimbatus. Consequently, F. eremicus J.Guerra & J.A.Jiménez has been here described as a new species that can be considered as pseudocryptic and is readily confused with F. sublimbatus. This new taxon is known from the Canary Islands, North Africa and south-southeast Spain, colonising loamy-calcareous soils in ravines of places that are generally neither arid nor subject to much rain.
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    Helvella monachella (Scop.) Fr. (Helvellaceae, Pezizales) in Tunisia, a second report to the rare African Ascomycota
    (Universidad de Murcia. Servicio de Publicaciones, 2025) El Mokni, Ridha; Sin departamento asociado
    Helvella monachella (Scop.) Fr. (Helvellaceae, subg. Elasticae) is here reported for the second time among the African Ascomycota group from northwestern Tunisia, based on mycological surveys and analysis of relevant literature. General characteristics together with original photographs are here provided for Tunisian material. Habitat and current distribution of this new discovery in Tunisia are presented. A discriminating key to species of the genus Helvella known in Tunisia is also proposed.
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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.