Porphyra drewiana Coll & E.C.Oliveira 2001

Publication Details
Porphyra drewiana Coll & E.C.Oliveira 2001: 67-72, figs 1-11, 1 table

Published in: Coll, J. & Oliveira, E.C. (2001). Porphyra drewiana, a new species of red algae (Bangiales, Rhodophyta) from Brazil. Phycological Research 49: 67-72.

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Publication date: March 2001

Type Species
The type species (lectotype) of the genus Porphyra is Porphyra purpurea (Roth) C.Agardh.

Status of Name
This name is currently regarded as a synonym of Pyropia spiralis (E.C.Oliveira & Coll) M.C.Oliveira, D.Milstein & E.C.Oliveira.

Type Information
Type locality: Brazil: Est. Espírito Santo: Ilha do Boi, Vitória; (Index Nominum Algarum) Type: E.C. Oliveira; 4.xii. 1987; SPF; 53750 (Index Nominum Algarum)

General Environment
This is a marine species.

Description
Plants monostromatic, typically with one entire blade, rarely with deep lobes or a few blades; attachment by a distinct discoidal holdfast; blades orbiculate, oblong, obovate or broadly lanceolate, umbilicate or cordate, up to 14 cm long; color deeply violet when alive; texture membranaceous, delicate, not rubbery or cartilaginous; not firmly adherent to paper on drying, then papery and breakable. Infertile margin entire, slightly undulated, withough microscopic teeth. Vegetative cells with one stellate plastid and a central pyrenoid, oval to polygonal, 10-12µm in surface view; total thickness of the blades, at the vegetative central portion, 25-45 µm; fertile pluristromatic portions are about 10-15 µm thicker. Small, elongate, irregularly distributed patches (50-150 µm) call attention to vegetative portions of the blade. In cross section these patches are formed by periclinal divisions of the vegetative cells, resulting in locally bi-pluristromatic areas, 2-3 times thicker than the rest of the thallus. Monospores (type II), neutral spores or aplanospores were never found. Spermatangia and carposporangia are intermixed in a marginal-submarginal rosy band, which is almost continuous around the blade, which becomes perforated and eroded after spermatia and carpospores are shed. The first division of the carpospores and the spermatia mother cell is periclinal. The plastid divides before the nucleus in the first division of the carpospore mother cell, remaining in a central position between the two daughter plastids. Eight to 16 carpospores in two tiers and 16 spermatia in four tiers are produced per mother cell. Three chromosomes were counted in the nuclear divisions leading to spermatium formation. At the type locality the leafy phase was collected on rocks at the upper intertidal fringe, in euthrophic waters at moderate wave-exposed sites, from May to December, being fertile after July.

Created: 26 April 2002 by M.D. Guiry.

Last updated: 20 April 2023

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Linking to this page: https://www.algaebase.org/search/species/detail/?species_id=46901

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 20 April 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 29 March 2024

 
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