Eucheumatopsis isiformis (C.Agardh) Núñez Resendiz, Dreckmann & Sentíes
publication ID |
https://doi.org/ 10.11646/phytotaxa.387.3.3 |
DOI |
https://doi.org/10.5281/zenodo.13724601 |
persistent identifier |
https://treatment.plazi.org/id/03D1182D-FFB0-B11A-FF26-FCF563FD9815 |
treatment provided by |
Felipe |
scientific name |
Eucheumatopsis isiformis (C.Agardh) Núñez Resendiz, Dreckmann & Sentíes |
status |
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Eucheumatopsis isiformis (C.Agardh) Núñez Resendiz, Dreckmann & Sentíes
Thallus cartilaginous, red pink or dark red, 15–50 cm in length, with cylindrical axes in cross section, 850–2200 μm in diameter. Main axes branching irregularly; branches and main axes with smooth margins or covered by numerous spine-like branches, arranged radially or alternately opposite, 1–2.5 mm in length ( Fig. 22 and 26 View FIGURES 17–27. 17 ). Multiaxial organization with a filamentous medulla and a pseudoparenchymatous cortex ( Fig. 23 View FIGURES 17–27. 17 ). Medulla composed of a dense mass of thick filaments, 1.8–6 μm in diameter, with numerous simple rhizoids. Inner cortex with six layers of stellate or rounded cells, 8.8–28.4 μm x 5.2–12 μm in diameter and 34–106 μm x 40–140 μm in diameter, respectively; outer cortex with two layers of ellipsoidal cells, 6–13 μm x 3.5–4.4 μm in diameter, markedly pigmented. Cystocarps developed on short laterals, with a single large central fusion cell from which diploid gonimoblast filaments radiate, 360–498 μm x 400–640 μm in diameter ( Fig. 24 View FIGURES 17–27. 17 ). Tetrasporangia zonately divided, 30–40 μm x 10–15 μm in diameter, embedded in the cortical cells, each sporangium arising laterally from a stellate basal cell ( Fig. 25 View FIGURES 17–27. 17 ).
Taxonomic comment: Until recently, this species had been previously treated as Eucheuma isiforme (C.Agardh) J.Agardh. From molecular evidence this genus was found to be paraphyletic ( Núñez Resendiz et al. 2019), so the new genus Eucheumatopsis Núñez Resendiz, Dreckmann & Sentíes was described to accommodate the species E. isiformis , this name is reinstated.
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.