Halymenia pseudofloresii Collins & M.Howe
publication ID |
https://doi.org/ 10.11646/phytotaxa.387.3.3 |
DOI |
https://doi.org/10.5281/zenodo.13724613 |
persistent identifier |
https://treatment.plazi.org/id/03D1182D-FFB3-B119-FF26-FF3E63209F0B |
treatment provided by |
Felipe |
scientific name |
Halymenia pseudofloresii Collins & M.Howe |
status |
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Halymenia pseudofloresii Collins & M.Howe
Thallus membranous, mucilaginous, laminar, extended, purple-red, 25–36 cm in length, flattened in cross section, 285–310 μm in diameter. Main axes branching irregularly; branches with the appearance of ribbon strips, with margins completely covered by proliferations of sizes and variable diameters, arranged alternately opposite ( Fig. 59 View FIGURES 51–64. 51–53 ). Multiaxial organization with a filamentous medulla and a pseudoparenchymatous cortex ( Fig. 60 View FIGURES 51–64. 51–53 ). Medulla composed of several filaments loosely arranged in mucilaginous gel, 6–12 μm in diameter. Cortex composed of two layers of rounded cells, 10–18 μm in diameter. Tetrasporangia spherical, 15–20 μm in diameter, cruciately divided, scattered among the cortical cells ( Fig. 61 View FIGURES 51–64. 51–53 ).
Taxonomic comment: According to Schneider et al. (2010), from molecular data, Halymenia pseudofloresii is the only species distributed in the American Atlantic coasts. Its sister species, H. floresii , which has been previously recorded for Yucatan Peninsula ( Godínez-Ortega et al. 2008), appears to be restricted to Europe ( Schneider et al. 2010, Wynne 2017).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.