153,581 species and infraspecific names are in the database, 20,980 images, 59,369 bibliographic items, 411,009 distributional records.

Constantinea Postels & Ruprecht, 1840

Classification:
Empire Eukaryota
Kingdom Plantae
Subkingdom Biliphyta
Phylum Rhodophyta
Subphylum Eurhodophytina
Class Florideophyceae
Subclass Rhodymeniophycidae
Order Gigartinales
Family Dumontiaceae

Lectotype species: Constantinea rosa-marina (S.G.Gmelin) Postels & Ruprecht

Original publication:Postels, A. & Ruprecht, F. (1840). Illustrationes algarum in itinere circum orbem jussu imperatoris Nicolai I. Atque auspiciis navarchi Friderici Lütke annis 1826, 1827, 1828 et 1829 celoce Seniavin exsecuto in Oceano pacifico, inprimis septemtrionale ad littora rossica asiatico-americana collectarum. pp. [i-vi ], [i]- iv, 1-28 [1-2, index], [Latin:] [-iv], [1]-22, [1-2, index], 40 pls. Petropoli [St. Petersburg]: Typis Eduardi Pratz.

Type designated in Schmitz, F. (1889). Systematische Übersicht der bisher bekannten Gattungen der Florideen. Flora oder Allgemeine botanische Zeitung 72: 435-456, pl. XXI.
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Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Schneider, C.W. & Wynne, M.J. (2007). A synoptic review of the classification of red algal genera a half a century after Kylin's "Die Gattungen der Rhodophyceen". Botanica Marina 50: 197-249.

Description: Stipe terete, branched or unbranched, each axis terminating in a peltate or perfoliate, coriaceous, dusky red blade. Perennial. Stipe of longitudinally coursing, pseudodichotomous filaments. Blades of subspherical cells, decreasing in diameter toward cuticle. Axial filaments and surrounding rhizoids in blades frequently aggregated, producing macroscopically visible veins radiating from stipe to margin of blade. Additional rhizoids crossing from cortex to cortex. New blades initiated in autumn in response to short photoperiods (Lindstrom, 1980; Powell, 1986). Pit plugs lacking cap layers. Thalli dioecious. Carpogonium terminating a long, adventitious, distally recurved filament with extremely enlarged, lobed distal cells. Auxiliary cell on separate, adventitious filament, distal, with adjacent enlarged, lobed cells. Fertilization occurring in spring; post-fertilization development delayed until autumn (Lindstrom, 1981). Connecting filaments present. Most cells of cystocarp becoming relatively large carposporangia. Spermatangia distal on elongate, superficial spermatangial mother cells. Tetrasporophyte isomorphic. Large, zonate tetrasporangia borne superficially in nemathecia on upper, low or rarely both surfaces of blades. Outer fertile portions of terminal blades deciduous following release of reproductive products. Nondeciduous portions of blades eventually eroding and leaving scars on stipes.

Information contributed by: S.C. Lindstrom. The most recent alteration to this page was made on 7 Oct 2010 by M.D. Guiry.

Comments: Low intertidal to subtidal. Occurring only in the cool temperate to subarctic North Pacific Ocean: Japan, U.S.S.R., Alaska to California.

Numbers of names and species: There are 7 species names in the database at present, of which 4 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.

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

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Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=36503

Citing AlgaeBase
Please 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 14 November 2018.

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