Actinotrichia Decaisne, 1842

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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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 2010-10-05 by M.D. Guiry.

Taxonomic status: This name is of an entity that is currently accepted taxonomically.

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.

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

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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.

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

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 05 October 2010. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 24 November 2024