Eupogodon Kützing, 1845

Holotype species: Eupogodon planus (C.Agardh) Kützing

Original publication and holotype designation: Kützing, F.T. (1845). Phycologia germanica, d. i. Deutschlands Algen in bündigen Beschreibungen. Nebst einer Anleitung zum Untersuchen und Bestimmen dieser Gewächse für Anfänger. pp. [i]-x, [1]-340 ['240']. Nordhausen: zu finden bei Wilh. Köhne.

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Description: Thallus erect to subprostrate, sympodially developed and bilaterally (Kylin 1956, Millar 1996) to radially organized (Howe 1920, Schlech 1990, de Jong et al. 1997), alternately or dichotomously to irregularly branched, consisting of several irregular and entangled, branched main axes arising from a central holdfast, some species beset with short spine-like branches. Indeterminate axes terete or slightly flattened and spirally or randomly producing determinate pseudolateral branch systems (ramelli) from each polysiphonous segment, these at times tufted. Pseudolaterals pigmented, monosiphonous except at the extreme base, simple to adaxially-subdichotomously branched, often deciduous below, and one per segment arranged in a counterclock-wise spiral or deflected in a bilateral pattern. Axial row surrounded by 5 periaxial cells which quickly cut off corticating cells that give rise to short descending filaments that pit-connect with lower periaxial and corticating cells, collectively forming heavy cortication obscuring the periaxials. Plants isomorphic and dioecious, with male filaments at times more slender than those on cystocarpic or tetrasporic plants (Schlech & Abbott 1989). Spermatangia formed in several successive whorled series on monosiphonous stalks of upper portions of pseudolaterals, overall forming organized conical to linear-lanceolate stichidia often with sterile tips. One or more stichidium can form on the same pseudolateral branch system. Procarps, produced laterally on determinate or indeterminate polysiphonous axes, consist of a supporting cell, a 4-celled carpogonial branch and 2 sterile cells, one borne laterally on the carpogonial branch and the other basally on the supporting cell. Cystocarps with extensive pericarps lateral to the indeterminate axes, with or without short beaks. Tetrahedral sporangia produced in successive whorls on short, modified, polysiphonous, pseudolaterals or short adventitious branches, forming linear-lanceolate to apiculate stichidia. Tetrasporangia only partially enclosed by cover cells at maturity.

The most recent alteration to this page was made on 2023-12-08 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 masculine.

Most recent taxonomic treatment adopted: Cormaci, M., Furnari, G., Alongi, G. & Serio, D. coautrice per le Ceramieae (2023). Flora marina bentonica del Mediterraneo: Rhodophyta - Rhodymeniophycidae III: Ceramiales I (RHODOMELACEAE escluse). Bollettino Accademia Gioenia di Scienze Naturali in Catania 56(386): 81-621, 109 pls.

Comments: Two recent papers on the taxonomic staus of Eupogodon (Millar, 1996; de Jong et al. 1997) confirm the lack of consensus on the key diagnostic features of this genus. Millar (1996) would restrict to Eupogodon only those species that are bilaterally organized. This genus has a rich nomenclatural history that is nicely detailed by de Jong et al. (1997). A subtidal genus predently known only from the Atlantic coast of Spain, Canary Is., Mediterranean Sea, Black Sea, and Malaysia.

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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=35485

Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 08 December 2023. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 22 November 2024

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