Chrysymenia pseudoventricosa W. E. Schmidt, Gurgel and Fredericq, 2016

Schmidt, W. E., Gurgel, C. F. D. & Fredericq, S., 2016, Taxonomic Transfer of the Red Algal Genus Gloiosaccion to Chrysymenia (Rhodymeniaceae, Rhodymeniales), Including the Description of a New Species, Chrysymenia pseudoventricosa, for the Gulf of Mexico, Phytotaxa 243 (1), pp. 54-70 : 62

publication ID

https://doi.org/ 10.11646/phytotaxa.243.1.2

DOI

https://doi.org/10.5281/zenodo.13680456

persistent identifier

https://treatment.plazi.org/id/03A487B9-FFB3-2305-FF50-FC94D4C7F9D6

treatment provided by

Felipe

scientific name

Chrysymenia pseudoventricosa W. E. Schmidt, Gurgel and Fredericq
status

sp. nov.

Chrysymenia pseudoventricosa W. E. Schmidt, Gurgel and Fredericq , sp. nov.

Figures 9–16 View FIGURES 9–16 .

HOLOTYPE: sample LAF-NSF-II-78-2 ( WES 16 ), Campeche Banks , Southeastern Gulf of Mexico, Mexico, 22˚10’420” N, 91˚ 09’550” W), 42–43 m depth sample NSF-II-106-3, vegetative plant, attached to rhodolith. Figs. 9–14 View FIGURES 9–16 , leg. Suzanne Fredericq, deposited in LAF.

ETYMOLOGY: the specific epithet refers to the similarity in habit with C. ventricosa .

SYNONYM: Chrysymenia ventricosa in part

MATERIAL EXAMINED: Campeche Banks, SE Gulf of Mexico, Mexico, LAF-NSF-II-63-1 ( WES 88 ), 21˚48’048” N, 91˚54’962” W), 30–38 m depth ; LAF-NSF-II-106-3, 22˚10’420” N, 91˚ 09’550” W, 18.vi.2005, dredged from a depth of 37–43 m, attached to rhodolith ; sample NSF-II-106-3, vegetative plant. See Table 1.

GEOGRAPHIC DISTRIBUTION: Gulf of Mexico, Florida, Caribbean, Bermuda, Canary Islands [see records in Taylor (1960), Littler and Littler (2000) as C. “ ventricosa ”]

HABIT AND VEGETATIVE STRUCTURE: Thalli up to 10.5 cm tall and 13 cm in width, terete to moderately compressed, with a thickness of approximately 4.5 mm, from a small attachment stipe of 2 mm in height, and a small discoid holdfast ( Fig. 9 View FIGURES 9–16 ). The blade is hollow and filled with mucilage. Gland cells are pyriform, solitary ( Fig. 10 View FIGURES 9–16 ), or borne on unmodified medullary cells ( Fig. 11 View FIGURES 9–16 ). The thallus is completely corticated ( Fig. 12 View FIGURES 9–16 ), composed of threeto-four pigmented cortical cell layers ( Fig. 13 View FIGURES 9–16 ), a larger layer of roundish subcortical cells, and one-to-two medullary layers of hyaline cells ( Fig. 14 View FIGURES 9–16 ). The middle portion of the stipe is of complete solid construction, with pigmented cortical cells transitioning into large hyaline medullary cells filling the solid mass with rhizoidal filaments ( Fig. 15 View FIGURES 9–16 ). Internal filaments develop either from transformed medullary cells, or invading medullary cells ( Fig. 16 View FIGURES 9–16 ). Female, male and tetrasporangial thalli were not seen.

REPRESENTATIVE SEQUENCES: HQ400581 (rbc L), KT154726 (LSU), KT154701 (UPA).

N

Nanjing University

W

Naturhistorisches Museum Wien

LAF

University of Louisiana at Lafayette

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