155,805 species and infraspecific names are in the database, 21,968 images, 60,221 bibliographic items, 439,336 distributional records.

Herpodiscus G.R.South, 1974

Classification:
Empire Eukaryota
Kingdom Chromista
Phylum Ochrophyta
Class Phaeophyceae
Subclass Dictyotophycidae
Order Sphacelariales
Family Sphacelariaceae

Holotype species: Herpodiscus durvilleae (Lindauer) G.R.South

Original publication and holotype designation: South, G.R. (1974). Herpodiscus gen. nov. and Herpodiscus durvilleae (Lindauer) comb. nov., a parasite of Durvillea antarctica (Chamisso) Hariot endemic to New Zealand. Journal of the Royal Society of New Zealand 4: 455-461.

Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Silberfeld, T., Rousseau, F. & Reviers, B. de (2014). An updated classification of brown algae (Ochrophyta, Phaeophyceae). Cryptogamie Algologie 35(2): 117-156.

Taxonomic notes
Heesch et al. (2008) note that results from phylogenetic analyses place this within the order Spacelariales and that molecular data were supported by two morphological features characteristic for the Sphacelariales sensu stricto. However, the strongly heteromorphic life history distinguishes H. durvillaeae from all other members of the Sphacelariales of which the life cycle is known. This variability in life history provides a new systematic character for the order and should be taken into account in any comprehensive systematic revision of the Sphacelariales. - (14 Nov 2008) - Wendy Guiry

Herpodiscus durvillaeae, Sphacelaria pulvinata and the Sphacelaria subgenera Bracteata and Reinkea are merged in an emended Herpodiscus (Draisma et al. 2010). - (2 Nov 2010) - Wendy Guiry

Description: Plants forming little tufts on parenchymatic brown algae and on seagrasses, occasionally epililithic. Filaments with apical growth, haplostichous, oligostichous or polystichous, with or without secondary transverse cell walls. Unilocular zoidangia solitary or in adaxial, lateral sympodia, plurilocular zoidangia on branched small laterals. Life cycle isomorphic, strongly heteromorphic or unknown.

Information contributed by: M.D. Guiry; emended by Draisma, Prud'homme van Reine and Kawai. The most recent alteration to this page was made on 20 Jun 2014 by M.D. Guiry.

Numbers of names and species: There are 12 species names in the database at present, of which 12 have been flagged as accepted taxonomically on the basis of the listed literature under the species name. In some instances, opinions on taxonomic validity differ from author to author and users are encouraged to form their own opinion. AlgaeBase is a work in progress and should not be regarded as a definitive source only as a guide to the literature..

Names: ('C' indicates a name that is accepted taxonomically; 'S' a homotypic or heterotypic synonym; 'U' indicates a name of uncertain taxonomic status, but which has been subjected to some verification nomenclaturally; 'P' indicates a preliminary AlgaeBase entry that has not been subjected to any kind of verification. For more information on a species click on it to activate a link to the Species database):

Click here to also show infraspecific names in the list below.

References
Draisma, S.G.A., Prud'homme van Reine, W.F. & Kawai, H. (2010). A revised classification of the Sphacelariales (Phaeophyceae) inferred from a psbC and rbcL based phylogeny. European Journal of Phycology 45(3): 308-326.

Heesch, S., Peters A.F., Broom, J.E. & Hurd, C.L. (2008). Affiliation of the parasite Herpodiscus durvillaeae (Phaeophyceae) with the Sphacelariales based on DNA sequence comparisons and morphological observations. European Journal of Phycology 43: 283-295.

Verification of data
Users are responsible for verifying the accuracy of information before use, as noted on the website Content page.

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.

Created: 28 December 2000 by M.D. Guiry

Verified by: 20 June 2014 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=42585

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 16 July 2019.

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