163,902 species and infraspecific names are in the database, 22,783 images, 63,101 bibliographic items, 483,547 distributional records.

Halopeltis J.Agardh, 1854

Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Rhodymeniophycidae
Order Rhodymeniales
Family Rhodymeniaceae

Holotype species: Acropeltis australis J.Agardh

Currently accepted name for the type species: Halopeltis australis (J.Agardh) G.W.Saunders

Original publication and holotype designation: Agardh, J.G. (1854). Nya algformer. Öfversigt af Kongl. Vetenskaps-Academiens Förhandlingar, Stockholm 11(4): 107-111.
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Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Saunders, G.W. & McDonald, B. (2010). DNA barcoding reveals multiple overlooked Australian species of the red algal order Rhodymeniales (Florideophyceae), with resurrection of Halopeltis J. Agardh and description of Pseudohalopeltis gen. nov. Botany 88: 639-667, 73 figs.

Nomenclatural notes
Saunders & McDonald (2010: 656-657) recount the "convoluted" nomenclatural history of this entity: "Agardh (1854) erected the genus Halopeltis ultimately on the basis Rhodymenia australis Sonder, which unfortunately has a convoluted nomenclatural history. Sonder (1845) included (as var. constricta) Fucus constrictus Turner (1809-1811) in his description of Rhodymenia australis, rendering his name superfluous and thus illegitimate. In recognizing this, Silva (in Silva et al. 1996) proposed the substitute name Rhodymenia sonderi P.C. Silva unaware of Womersley's (1996, p. 77) proposal, published just three days earlier, that R. foliifera Harvey (1863) be regarded as a taxonomic synonym of Rhodymenia australis and thus an available name for this species. However, an earlier legitimate name is available for this taxon if it is transferred from Rhodymenia. In his transfer of R. australis to Sphaerococcus (as S. australis), Kützing (1849) excluded F. constrictus such that this binomial is not superfluous rendering "australis" a legitimate epithet and available for this species in genera for which the binomial is not a later homonym. Unfortunately, Sphaerococcus australis Kützing is a later homonym of S. australis Harvey (1844), rendering this binomial illegitimate. However, in transferring S. australis Kützing to Acropeltis, J. Agardh (1852) established a legitimate name (Acropeltis australis J. Agardh) for what is presently called Rhodymenia sonderi P.C. Silva, in the event this species is transferred from Rhodymenia. Acropeltis australis is thus a legitimate name on which Agardh (1852) based his genus Halopeltis. Unfortunately, Agardh never formally made the combination Halopeltis australis (effected here), but he did validly publish his genus (Agardh 1852, pp. 110), which we resurrect for this speciose genus thus far known only from the Southern Hemisphere." - (26 Mar 2011) - M.D. Guiry

Description: Rhodymeniacean taxa with a medulla of large cells, typically two ordered rows near apices in some species, in irregular arrays in others, the cells separated by intervening spaces with small intercalating cells. Tetrasporangial sori initiated by the swelling of pre-existing (i.e., not adventitious) intercalary and terminal outer cortical cells, some converting to sporangial production, others compressed between developing sporangia appearing as 1–2- celled sterile filaments, but the general impression is that most outer cortical cells will eventually convert to sporangial production. Tetrasporangial sori are confined to a single thallus surface in some species, produced predominantly on one surface in others, or developing equally on both surfaces, but with one side lagging in development relative to the other. Sori are initially circular to oval, but expand with age to become oblong to cordiform (where branch tips are dichotomous). Cystocarps are protuberant, spherical or occasionally hemispherical, weakly to strongly basally constricted, and ostiolate; pericarp chambers are lined to varying degrees with an anastomosing network of typically stellate cells. Spermatangial mother cells, where known, are typically columnar to obpyriform.

Information contributed by: G.W.Saunders. The most recent alteration to this page was made on 8 Apr 2011 by M.D. Guiry.

Numbers of names and species: There are 9 species names in the database at present, of which 9 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.

Wynne, M.J. & Schneider, C.W. (2010). Addendum to the synoptic review of red algal genera. Botanica Marina 53: 291-299.

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

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: 13 October 2010 by M.D. Guiry

Verified by: 26 March 2011 by M.D. Guiry

Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=51081

Citing AlgaeBase
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2021. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 23 October 2021.

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