Liagora J.V., 1812
Lectotype species: Liagora viscida (Forsskål) C.Agardh
Original publication:Lamouroux, [J.V.F.] (1812). Extrait d'un mémoire sur la classification des Polypiers coralligènes non entièrement pierreux. Nouveaux Bulletin des Sciences, par la Société Philomathique de Paris 3: 181-188.
Type designated in Schmitz, F. (1889). Systematische Übersicht der bisher bekannten Gattungen der Florideen. Flora oder Allgemeine botanische Zeitung 72: 435-456, pl. XXI.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Schneider, C.W. & Wynne, M.J. (2007). A synoptic review of the classification of red algal genera a half a century after Kylin's "Die Gattungen der Rhodophyceen". Botanica Marina 50: 197-249.
Description: Thalli calcified, upright, attached to the substratum by a discoid holdfast, with a texture ranging from firm and chalky to soft and mucilaginous. Axes terete, dichotomously to irregularly divided or with percurrent axes, often with many short lateral branches. Construction multiaxial, with a central core of medullary filaments producing anticlinal assimilatory filaments that eventually form a loose outer cortex. Assimilatory filaments sparingly or much divided, generally dichotomous but occasionally tri-polychotomous, composed of ovoid to elongate cells. Adventitious rhizoidal filaments often arising from the lower cells of the assimilatory filaments and acting as medullary filaments and producing additional assimilatory filaments. Outer cortical cells occasionally with terminal hairs or glandular cells. Monoecious or dioecious. Spermatangia arise from outer cortical cells, singly or in clusters on spermatangial mother cells. Carpogonial branches 3-6 celled, arising laterally from lower to mid cortical cells, generally strongly to moderately curved. Gonimoblast developing directly from the carpogonium, initially by a transverse division, eventually forming a diffuse or compact cluster of gonimoblast filaments terminated by a single carposporangium or a short chain of carposporangia. Fusion cell occasionally formed from the cells of the carpogonial branch and rarely the supporting and adjacent cells. Carposporangia either simple or quadripartite. Involucre arising from the cells in the near vicinity of the carpogonial branch, including those of nearby branches and those above and below the supporting cell, rarely the supporting cell itself. Involucral filaments intermingling with the gonimoblast filaments or remaining discrete. Tetrasporangia (where known) borne on a filamentous tetrasporophyte.
Information contributed by: John Huisman. The most recent alteration to this page was made on 20 Jan 2017 by M.D. Guiry.
Numbers of names and species: There are 128 species names in the database at present, as well as 20 infraspecific names. Of the species names, 55 have been flagged as accepted taxonomically on the basis of the listed literature under the species name. In some instances, opinions on taxonomic validity differ from author to author and users are encouraged to form their own opinion. AlgaeBase is a work in progress and should not be regarded as a definitive source only as a guide to the literature..
Names: ('C' indicates a name that is accepted taxonomically; 'S' a homotypic or heterotypic synonym; 'U' indicates a name of uncertain taxonomic status, but which has been subjected to some verification nomenclaturally; 'P' indicates a preliminary AlgaeBase entry that has not been subjected to any kind of verification. For more information on a species click on it to activate a link to the Species database):
Click here to also show infraspecific names in the list below.
Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.
Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in CD format. These AlgaeBase descriptions are now being continually updated, and each current contributor is identified above. The PSA and AlgaeBase warmly acknowledge the generosity of all past and present contributors and particularly the work of Dr Parker.
Descriptions of chrysophyte genera were subsequently published in J. Kristiansen & H.R. Preisig (eds.). 2001. Encyclopedia of Chrysophyte Genera. Bibliotheca Phycologica 110: 1-260.
Created: 01 January 2001 by M.D. Guiry
Verified by: 20 January 2017 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=33189
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 25 June 2019.