Halarachnion Kützing, 1843

Holotype species: Halarachnion ligulatum (Woodward) Kützing

Original publication and holotype designation: Kützing, F.T. (1843). Phycologia generalis oder Anatomie, Physiologie und Systemkunde der Tange. Mit 80 farbig gedruckten Tafeln, gezeichnet und gravirt vom Verfasser. pp. [part 1]: [i]-xxxii, [1]-142, [part 2:] 143-458, 1, err.], pls 1-80. Leipzig: F.A. Brockhaus.

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Description: Plants reach dimensions of 50 by 20 cm, are erect from crustose bases, and are compressed or flattened, irregularly to dichotomously divided and usually marginally proliferous. Medullary filaments are few and usually loosely arranged. GametophyteS are monoecious, the spermatangia occurring in small superficial sori. Supporting cells are monocarpogonial and usually 3-celled. Tetrasporophytes in the type species are crustose, corresponding in morphology to Cruoria rosea (P. L. and H. M. Crouan) P. L. and H. M. Crouan, whereas those in H. latissimum Okamura are reported to be isomorphic with the gametophytes. Life history studies have been made by Boillot (1965), and anatomy has been investigated by Knauss and Hommersand (1989).

Information contributed by: G.T. Kraft. The most recent alteration to this page was made on 2017-01-23 by M.D. Guiry.

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

Gender: This genus name is currently treated as neuter.

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: Distribution: The type species is widespread in the eastern Atlantic from Norway to Morocco and Great Britain, and the Mediterranean Sea. The second species, H. latissimum Okamura, occurs in southern Japan.

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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Some of the descriptions included in AlgaeBase were originally from the unpublished Encyclopedia of Algal Genera, organised in the 1990s by Dr Bruce Parker on behalf of the Phycological Society of America (PSA) and intended to be published in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=17

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 23 January 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 21 November 2024