Peltasta J., 1892
Holotype species: Peltasta australis J.Agardh
Original publication and holotype designation: Agardh, J.G. (1892). Analecta algologica. Acta Universitatis Lundensis 28(6): 1-182, 3 pls.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Kraft, G.T. & Womersley, H.B.S. (1994). Family Dicranemataceae Kylin 1932: 65. In: The marine benthic flora of southern Australia. Rhodophyta - Part IIIA. (Womersley, H.B.S. Eds), pp. 321-330. Canberra:
Dicranemataceae (Kraft & Womersley 1994: 327). - (22 Jul 2009) - Wendy Guiry
Description: Subdichotomous erect fronds reach 10 cm in length and arise from wiry creeping stolons. Thalli are flattened (2-3 mm in width) and are subdichotomously branched. Pseudoparenchymatous inner cortical cells are not only linked by secondary pit connections, but also by direct cell fusions (Kraft and Woelkerling 1990), a feature uncommon outside the Corallinales. Cystocarps form subterminal swellings which deflect and halt growth of the fertile branch apices. Fusion cells are complex, being composed of a small core of completely fused cells linked by wide cytoplasmic bridges at former pit-connection sites into a network of surrounding, partially consolidated gametophytic cells. Gonimoblast filaments arise on all parts of the fusion complex and can fuse to adjacent unincorporated cells, all of which can give rise to further gonimoblast filaments. Gonimoblasts radiate in all directions, although the mature carposporophyte is oriented toward the surface, to which it is linked by a wide ostiole. The carposporophyte consists of an inner placenta and outer parallel columns of narrow cells cutting off 1-3 carposporangia. Tetrasporangia are scattered through surface layers of slightly splayed branch tips.
Information contributed by: G.T. Kraft. The most recent alteration to this page was made on 7 Oct 2010 by M.D. Guiry.
Comments: Distribution: Endemic to southern Australia from Encounter Bay to Port Phillip Heads and the east coast of Tasmania, where it is very infrequently collected from rock at 4-25 m depths.
Numbers of names and species: There is only one species or infraspecific name in the database at present, which has 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.
Kraft, G.T. (1977). Studies of marine algae in the lesser-known families of the Gigartinales (Rhodophyta). II. The Dicranemaceae. Australian Journal of Botany 25: 219-267, 20 figs.
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: 28 December 2000 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=42792
Please cite this record as:
Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 21 January 2019.