153,789 species and infraspecific names are in the database, 21,012 images, 59,564 bibliographic items, 413,155 distributional records.

Taxonomy Detail

Order Sebdeniales

Sebdeniales Withall & G.W.Saunders, 2007: 388.

Type of name: Sebdenia

Source: Huisman, J.M. & Saunders, G.W. (2018). Sebdeniales. In: Algae of Australia. Marine benthic algae of north-western Australia. 2. Red algae. (Huisman, J.M. Eds), pp. 298-303. Canberra & Melbourne: ABRS & CSIRO Publishing.

Original publication: Withall, R.D. & Saunders, G.W. (2007 '2006'). Combining small and large subunit ribosomal DNA genes to resolve relationships among orders of the Rhodymeniophycidae (Rhodophyta): recognition of the Acrosymphytales ord. nov. and Sebdeniales ord. nov. European Journal of Phycology 41: 379-394.

Description:
Thallus soft to firm, erect with a single holdfast, or mat-forming and dorsiventral with secondary holdfasts from the ventral surface, branched or unbranched, with terete compressed or blade-like axes. Structure multiaxial; medulla of loosely arranged or periclinal hyaline filaments, with or without lateral vesicular cells, grading to an outer medulla of stellate or rounded cells; cortex of a few layers of rounded to elongate cells. Spermatangia in sori on outer cortical cells. Carpogonia and auxiliary cells in separate branch systems (non-procarpic) and not forming in specialised ampullae. Carpogonial branches 3- or 4-celled, lateral on cortical cells; auxiliary cells distinct, intercalary, after diploidisation issuing outwardly directed gonimoblasts directly; nutritive filaments present or absent. Cystocarps embedded, with an involucre and a slightly to markedly raised ostiolate pericarp, sometimes with several carposporophytes in a conjoined nemathecial pericarp, with almost all gonimoblast cells becoming carposporangia. Tetrasporangia cruciately or irregularly divided, scattered in the outer cortex or in raised nemathecia, arising laterally on a bearing cell. Life history triphasic, with isomorphic gametophytes and tetrasporophytes [after Schneider & Searles (1991: 268); Schneider et al. (2006)].

Nomenclatural notes:

Included in the Cryptonemiales F.Schmitz (1892: 21) by Athanasiadis (2016: 582).

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

References
(Please note: only references with the binomials in the title are included. The information is from the Literature database.)

Cesar Acleto, O. & Reina Zúñiga, A. (2011). Revisión de las especies peruanas de Sebdenia (Sebdeniales, Rhodophyta) y descripción de Cryptonemia anconensis sp. nov. (Halymeniales, Rhodophyta). Revista Peruana de Biologia 18(1): 97-112.

Huisman, J.M. & Saunders, G.W. (2018). Sebdeniales. In: Algae of Australia. Marine benthic algae of north-western Australia. 2. Red algae. (Huisman, J.M. Eds), pp. 298-303. Canberra & Melbourne: ABRS & CSIRO Publishing.

Kraft, G.T. & Saunders, G.W. (2011). Taxonomic and molecular studies of the family Sebdeniaceae (Sebdeniales, Rhodophyta): new species of Lesleigha gen. nov. and Crassitegula from Hawaii, east Asia and Lord Howe Island. European Journal of Phycology 46(4): 416-441.

N'Yeurt, A.D.R. & Payri, C.E. (2008). Sebdenia cerebriformis sp. nov. (Sebdeniaceae, Sebdeniales) from the south and western Pacific Ocean. Phycological Research 56: 13-20.

Schneider, C.W., Popolizio, T.R. & Lane, C.E. (2014). Notes on the marine algae of the Bermudas. 14. Five additions to the benthic flora, including a distinctive second new species of Crassitegula (Rhodophyta, Sebdeniales) from the western Atlantic Ocean. Phycologia 53(2): 117-126.

Withall, R.D. & Saunders, G.W. (2007 '2006'). Combining small and large subunit ribosomal DNA genes to resolve relationships among orders of the Rhodymeniophycidae (Rhodophyta): recognition of the Acrosymphytales ord. nov. and Sebdeniales ord. nov. European Journal of Phycology 41: 379-394.

Linking to this page: http://www.algaebase.org/browse/taxonomy/detail/?taxonid=88190

Citing AlgaeBase
Cite this record as:
Guiry, M.D. & Guiry, G.M. 2018. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 10 December 2018.

Algaebase taxon LSID: urn:lsid:algaebase.org:taxname:88190

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