Erythrotrichia Areschoug, 1850, nom. cons.

Holotype species: Erythrotrichia ceramicola (Lyngbye) Areschoug

Currently accepted name for the type species: Erythrotrichia carnea (Dillwyn) J.Agardh

Original publication and holotype designation: Areschoug, J.E. (1850). Phycearum, quae in maribus Scandinaviae crescunt, enumeratio. Sectio posterio Ulvaceas continen. Nova Acta Regiae Societatis Scientiarum Upsaliensis 14: 385-454, + 3 pls.

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Description: Thalli may be uniseriate, multiseriate or slightly foliose, to several mm in height. Each cell with a single, stellate chloroplast with central pyrenoid. Contains B-Type II phycoerythrin. Pit plugs absent. Growth may be apical in the early developmental stages, but soon becomes intercalary or diffuse. One or more of the basal cells produce rhizoidal outgrowths. Asexual reproduction via monospores. An oblique cytokinesis cleaves a vegetative cell into two unequal sized cells, the smaller of which becomes the monosporangium. In situ germination of monospores to form lateral branches has been reported. Sexual reproduction has been documented. Gametophytes are tricellular, the apical cell of which produces a spermatangium by an oblique division, and a single spermatium is released. Following spermatium release the remaining apical cell contents differentiate into a carpogonium that a spermatium will contact and fuse with. Following fertilization the zygote germinates in situ and forms a linear series of diploid cells on the gametophyte. These diploid cells eventually form monosporangia and release single monospores. Meiosis is thought to be somatic, occuring at the time of monospore germination. Growing epiphytically on other algae or seagrass.

Information contributed by: M. Hawkes. The most recent alteration to this page was made on 2017-01-19 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 feminine.

Most recent taxonomic treatment adopted: Athanasiadis, A. (2016). Phycologia Europaea Rhodophyta Vol. I. pp. [i]-xxxxviii, 1-762. Thessaloniki: Published and distributed by the author.

Comments: Widely distributed, however, many of the taxa referred to this genus require further investigation. Given the simple morphology and presumed antiquity of these rhodophytes it is highly likely that the species currently placed in Erythrotrichia are not congeneric.

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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.

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M.D. Guiry in Guiry, M.D. & Guiry, G.M. 19 January 2017. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 24 June 2024

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