Trentepohlia C.Martius, 1817, nom. cons.

Holotype species: Trentepohlia aurea (Linnaeus) C.Martius

Original publication and holotype designation: Martius, C.F.P. von (1817). Flora cryptogamica erlangensis sistens vegetabilia e classe ultima Linn. in agro erlangesi hucusque detecta.... pp. [i]-lxviii, [1-2, h. t. and motto], 1-512, 6 folded plates. Norimbergae [Nürnberg]: sumptibus J. L. Schrag.

Description: Thallus filamentous, formed by a prostrate system of creeping filaments from which erect filaments, sparsely to profusely branched, arise. The relative development of the prostrate and erect parts differs among species (sometimes in the same species, depending on the environmental conditions). Specialized rhizoids do not occur. In some species, hair-like, colourless unicellular protuberances are borne on the vegetative cells. Gametangia lateral, terminal, or intercalary, usually borne on the erect filaments but in some species found also on prostrate filaments. The gametangia are globular or ovoid and produce a variable number of biflagellate gametes. The gametes are released through a circular ostiole or an elongated beak, and fuse by isogamy. Sporangiate laterals usually solitary, borne at the top of the erect filaments or short lateral branches; in a few species they are clustered in groups of 2–8 on enlarged apical cells at the top of the erect filaments. The life history is presumed to consist of an alternation of two generations with identical morphology, a haploid gametophyte reproducing sexually by gametes, and a diploid sporophyte reproducing asexually by zoospores. However, direct observations of gametes fusing are infrequent; at the same time, gametes behaving as spores and reproducing new thalli without sexual fusion have been documented for several species.

Information contributed by: Skaloud et al. (2018: 228).. The most recent alteration to this page was made on 2024-04-22 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: Škaloud, P., Rindi, F., Boedeker, C. & Leliaert, F. (2018). Süßwasserflora von Mitteleuropa. Freshwater flora of central Europe: Chlorophyta V: Ulvophyceae. Vol. 13 pp. [i]-vii, [1]-288, 182 figures. Berlin: Springer Spektrum.

Comments: Species of Trentepohlia occur on many different substrata (rocks, tree bark, leaves, twigs, fruits, soil, woodwork, carved stone, concrete walls and pillars, metals, plastics), where they may form large orange, red or yellow patches at sites with conditions of high humidity. Often lichenised.

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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. 22 April 2024. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway.; searched on 22 June 2024

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