Platoma heteromorphum Schils 2002
Publication Details
Platoma heteromorphum Schils 2002: 256-259, figs 7-17
Published in: Schils, T. & Coppejans, E. (2002). Gelatinous red algae of the Arabian Sea, including Platoma heteromorphum sp. nov. (Gigartinales, Rhodophyta). Phycologia 41: 254-267.
Request PDFType Species
The type species (holotype) of the genus Platoma is Platoma cyclocolpum (Montagne) F.Schmitz.
Status of Name
This name is of an entity that is currently accepted taxonomically.
Type Information
Type locality: Masirah Island, close to Ra’s Zarri, Oman (site 09: 20o11’85"N, 58o42’55"E); (Schils & Coppejans 2002: 258) Holotype: T.Schils; 9 November 1999; subtidal, 9m. Species-rich algal flora, dominant species are Spatoglossum asperum J.Agardh, Sebdenia flabellata (J.Agardh) P.G. Parkinson, Dictyota spp. and Padina spp. Rocky platform with grooves and rocky outcrops; MAS; 139, upper left specimen on herbarium sheet (field picture, Fig. 7) (Schils & Coppejans 2002: 258)
General Environment
This is a marine species.
Description
Deep red plants, foliose to subcylindrical in shape. Multiple blades with short stipes (6-9 mm long) arise from a single discoid holdfast (1 mm across). Cortex consists of four to eight outer cortical cells,
containing numerous intercalary gland cells, and an inner layer of elongated cells (including X- and V-shaped cells) giving rise to medullary filaments. Three-celled carpogonial branches occasionally bearsterile cells. The fertilized carpogonium divides longitudinally into two halves, fusing with adjacent subsidiary auxiliary cells. One of the diploidized subsidiary cells and the cell distal to it initiate septate an intercalary position in separate cortical filaments and are characterized by their obpyriform shape (16-21 µm x 11-13 µm) and deep staining with Aniline Blue. After lateral fusion of a connecting filament with a generative auxiliary cell, the former continues to grow and effects further diploidizations. The diploidized generative auxiliary cell divides transversely, producing a conical gonimoblast initial (6.5-9.5 µm x 6-10 µm). Two gonimolobes are formed, which mature
sequentially and produce angular carposporangia (11.5-30 µm in diameter). Tetrasporangia and spermatangia unknown.
Created: 19 August 2002 by M.D. Guiry.
Last updated: 13 May 2007
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Linking to this page: https://www.algaebase.org/search/species/detail/?species_id=54542
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 13 May 2007. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 26 April 2024
