Aglaothamnion diaphanum L'Hardy-Halos & Maggs 1991

Publication Details
Aglaothamnion diaphanum L'Hardy-Halos & Maggs 1991: 468, figs 1-41

Published in: L'Hardy-Halos, M.-T. & Maggs, C.A. (1991). A novel life history in Aglaothamnion diaphanum sp. nov. (Ceramiaceae, Rhodophyta) from the British Isles and Brittany. Phycologia 30: 467-479.

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Type Species
The type species (holotype) of the genus Aglaothamnion is Aglaothamnion furcellariae (J.Agardh) Feldmann-Mazoyer.

Status of Name
This name is of an entity that is currently accepted taxonomically.

Type Information
Holotype locality: St John’s Point, Co. Donegal, Ireland; Holotype: C.A.Maggs; 28 viii 1990; PC; (Maggs & Hommersand 1993: 95) Notes: Holotype is a bisporophyte. Isotypes in PC, BM, GALW, O.

Origin of Species Name
Adjective (Latin), colourless and nearly or quite transparent, diaphanous (Stearn 1973).

General Environment
This is a marine species.

Plants solitary or in small groups arising from discoid filamentous holdfast or creeping axes, usually less than 5 mm in length, occasionally up to 10 mm long, of a delicate texture and pale pink in colour; main axes lacking adherent cortex but forming loose rhizoidal filaments that attach to the substratum; branching in a single plane, regularly alternate, distichous, first cell of lateral branches always bearing an adaxial branchlet, apices corymbose; all cells uninucleate, containing a few ribbon-like plastids arranged longitu­ dinally; occasional cells of thalli striated in ap­ pearance, densely packed with spiny structures of unknown nature. Dioecious; spermatangia and bisporangia on separate plants or occasionally mixed on same thallus; spermatangial branchlets adaxial, 1-3 per cell, consisting of 3-4 cells bearing sper­ matangia in groups of two to four, spermatangial nuclei in median position; carpogonial branch 4-celled, post-fertilization events unknown; bisporangia adaxial, normally sessile, 42-58 x 22-36 µm, obliquely divided; released bispores giving rise in culture to further bisporophytes that may also form spermatangia.

Created: 17 May 1996 by M.D. Guiry.

Last updated: 09 February 2017

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Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 09 February 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 04 March 2024

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