Pseudocrossidium linearifolium (Pottiaceae) comb. et stat. nov

Alonso

et al. 2015

Self Cite

A new species of Pseudocrossidium R.S.Williams, P. exiguum M.J.Cano & J.A.Jimé nez, is described from South America (Argentina, Brazil and Peru). The species is distinguished morphologically by its lingulate to oblong-ovate leaves, leaf marginal cells not or scarcely differentiated from inner, costa ending below apex or percurrent, and semicircular to elliptical in cross-section with two guide cells, scarcely differentiated perichaetial leaves and peristome of short and straight teeth. Drawings and light microscope photographs of the new species are provided. The principal distinctive characters that separate it from the nearest species of Pseudocrossidium and related genera are discussed.

Section: Introductionmentioning

confidence: 81%

Section: Introductionmentioning

confidence: 99%

Pseudocrossidium exiguumM.J.Cano & J.A.Jiménez (Pottiaceae), a new species from South America

Alonso

et al. 2015

Self Cite

“…J.A.Jiménez & M.J.Cano, a species known from Argentina, Bolivia, and Ecuador (Jiménez et al, 2009). They share a similar leaf shape, the curvature of the margins, the anatomical structure of the costa, and the excurrent costa forming a mucro.…”

Section: Taxonomic Notesmentioning

confidence: 99%

OnBarbula munyensisR.S.Williams (Pottiaceae), an overlooked species from the tropical montane forest of South America

Churchill

2014

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Barbula munyensis R.S.Williams, a neglected moss species known only from the type material collected in central Peru in 1923, is newly reported for the moss floras of Argentina and Bolivia. The species is described, illustrated, mapped, and its habitat preferences are provided. Diagnostic characters and differentiation from some closely related South American taxa, with which it may be confused, are discussed. Barbula orizabensis Mü ll.Hal., a similar taxon, is excluded from the South American moss flora.

“…Pseudocrossidium R.S.Williams includes 17 species in the world (Zander, 1993;Jiménez et al, 2009;Cano, 2011). It is distributed mostly in South America, and only four species, P. adustum Zander (1993) important characters for this genus are the usual small sizes, absence of ventral stereid band and the broadly crescent-shaped dorsal stereid band, with a clearly differentiated dorsal epidermis of cells often with semicircular lumens through differential thickening of the walls.…”

Section: Introductionmentioning

confidence: 99%

“…In our studies of the South American genera of Pottiaceae (Cano, 2008;Cano & Gallego, 2008;Cano et al, 2010aCano et al, , 2010bGallego & Cano, 2009;Jiménez et al, 2009), we have devoted recent years to the taxonomic revision of the genus Pseudocrossidium. This study has provided the opportunity to examine the type material of most of the taxa included in this genus.…”

Section: Introductionmentioning

confidence: 99%

Pseudocrossidium perpapillosum (Pottiaceae) a new species from South America

Guerra

2011

Pseudocrossidium perpapillosum M.J.Cano & J.A.Jimé nez is described and illustrated as a new South American species from Argentina and Chile. It differs from other species of Pseudocrossidium R.S.Williams by the costa excurrent in an awn, elliptical in cross-section, with 4-5(6) guide cells, marginal laminal cells differentiated with rounded, thin-walled and papillose cells, paracostal distal cells with 1-2(4) bi-to quadrifurcate, long papillae, and perichaetial leaves differentiated.