159,920 species and infraspecific names are in the database, 22,564 images, 61,939 bibliographic items, 469,141 distributional records.

Pikea Harvey, 1853

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

Holotype species: Pikea californica Harvey

Original publication and holotype designation: Harvey, W.H. (1853). Nereis boreali-americana; or, contributions towards a history of the marine algae of the atlantic and pacific coasts of North America. Part II. Rhodospermeae. Smithsonian Contributions to Knowledge 5(5): [i-ii], [1]-258, pls XIII-XXXVI.
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Taxonomic status: currently recognized as a distinct genus.

Most recent taxonomic treatment adopted: Kylin, H. (1956). Die Gattungen der Rhodophyceen. pp. i-xv, 1-673, 458 figs. Lund: C.W.K. Gleerups.

Nomenclatural notes
Named for "Capt. Nicholas Pike of Brooklyn" actually Col. Nicolas [sic] Pike (1818-1905) the soldier-engineer, traveller and naturalist who was US consul at Maritius, and Director of the Brooklyn Institute of Arts and Sciences in New York. - (30 Jan 2015) - M.D. Guiry

Monotypic when first introduced. - (23 Jan 2017) - M.D. Guiry

Description: Uniaxial, terete to compressed, regularly pinnately to subdichotomously branched to five orders. Large axial cell flanked laterally by two or three slightly smaller periaxial and more distal branch cells, surrounded by rhizoids. Cortex of progressively smaller elliptical to spherical cells toward cuticle. Secondary pit connections present. Dioecious. Carpogonium terminating a long, distally recurved, adventitious filament with somewhat enlarged distal cells. Connecting filaments issuing from carpogonial fusion process, contacting a succession of differentiated auxiliary cells occurring near distal ends of separate, occasionally proximally branched, percurrent, adventitious filaments. Two to four gonimoblast filaments arising from remnant of connecting filament attached to auxiliary cell, producing a compact cystocarp that causes the branch bearing it to swell. Most cells maturing into relatively small carposporangia. Gonimoblast fusion cell and carpostome lacking. Spermatangia superficial, cut off by oblique walls. Tetrasporophyte heteromorphic, crustose. Tetrasporangia small, cruciate, attached basally. Monosporangia reported on crust (Scott and Dixon, 1971). Direct life history, circumventing tetrasporophyte, also reported (Chihara, 1972).

Information contributed by: S.C. Lindstrom. The most recent alteration to this page was made on 23 Jan 2017 by M.D. Guiry.

Comments: Antiviral activity has been demonstrated (Ehresmann et al., 1977). Distributed in temperate waters of the northern hemisphere: Pacific Ocean: central Japan and Gulf of Alaska to Baja California; Atlantic Ocean: southwestern England (probably introduced, see Maggs and Guiry, 1987).

Numbers of names and species: There are 7 species names in the database at present, of which 3 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.

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: 23 January 2017 by M.D. Guiry

Linking to this page: http://algaebase.org/search/genus/detail/?genus_id=33202

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 22 January 2021.

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