161,424 species and infraspecific names are in the database, 22,723 images, 62,809 bibliographic items, 473,325 distributional records.

Actinotrichia Decaisne, 1842

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Nemaliophycidae
Order Nemaliales
Suborder Galaxaurineae
Family Galaxauraceae

Holotype species: Actinotrichia rigida (J.V.Lamouroux) Decaisne

Currently accepted name for the type species: Actinotrichia fragilis (Forsskål) Børgesen

Original publication and holotype designation: Decaisne, J. (1842). Mémoire sur les corallines ou polypiers calcifères. Annales des Sciences Naturelles, Botanique, Seconde Série 18: 96-128.
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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: Plants calcified, dichotomously branched; branches, terete, weakly articulated, multiaxial, with apical depression. Gametophytes and tetrasporophytes isomorphic. Medulla filamentous; cortical cells closely packed and polygonal to circular in surface view, inner cortical cells large, progressively smaller toward surface, surface cortical cells bearing multicellular, photosynthetic filaments in whorls or distributed irregularly around the axes. Dioecious; spermatangia and sterile filaments formed around the periphery of male conceptacles; cystocarpic conceptacles ostiolate, lined with sterile filaments; gonimoblast filaments compacted into a central column; carposporangia terminal on gonimoblast filaments. Tetrasporangia cruciately divided, terminal on photosynthetic filaments.

Information contributed by: R.B. Searles. The most recent alteration to this page was made on 5 Oct 2010 by M.D. Guiry.

Comments: Rarely collected in tropical and subtropical waters of the Red Sea, Indian and Pacific Ocean

Numbers of names and species: There are 7 species names in the database at present, of which 5 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.

Contributors
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: 28 December 2000 by M.D. Guiry

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Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=34149

Citing AlgaeBase
Please cite this record as:
Guiry, M.D. & Guiry, G.M. 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 06 May 2021.

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