Holotype species: Calliarthron cheilosporioides Manza
Currently accepted name for the type species: Calliarthron cheilosporioides Manza
Original publication and holotype designation: Manza, A.V. (1937). The genera of the articulated corallines. Proceedings of the National Academy of Science of the United States of America 23: 44-48.
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: Thalli comprising crustose holdfasts bearing one to several erect, variously branched, articulated fronds. Fronds of calcified intergenicula separated by uncalcified genicula. Intergenicula of arching tiers of medullary cells surrounded by a photosynthetic cortex and a unistratose layer of epithallial cells. Intergenicular medullary filaments interlaced, except sometimes near genicula. Cells in contiguous filaments often fusing; secondary pit-connections lacking. Genicula consisting of single tiers of long, straight, unbranched cells uncalcified except where they project into neighboring intergenicula. Trichocytes unknown. Reproductive cells forming within conceptacles originating on intergenicular margins near branch apices (marginal conceptacles) or in lateral conceptacles originating in cortex lower in the frond (lateral conceptacles). Conceptacle pores central or excentric. Conceptacles lacking surmounting branches. Tetrasporangial conceptacles lacking paraphyses and containing >30 mature tetrasporangia prior to spore discharge. Bisporangia unknown. Sexual plants dioecious. Spermatangial conceptacles opening by pore at tip of beak projecting from roof. Spermatangial mother cells and spermatangia produced from densely packed layer of basal cells on floor and walls of conceptacle chamber. Carpogonial conceptacles with extensive layer of >200 supporting cells with carpogonial filaments. Carposporangial conceptacles containing broad, thin fusion cells with gonimoblast filaments arising from upper surface. Spores germinating into crustose sporelings by the Corallina-type of spore germination. Subsequent growth is into a slowly spreading crust from which fronds develop.
Information contributed by: H.W. Johansen. The most recent alteration to this page was made on 9 Jun 2011 by Paul Gabrielson.
Comments: Calliarthron contains robust plants which, in C. cheilosporioides, may be up to 30 cm tall. The two species are endemic and prominent in the northeast Pacific where they form luxuriant growths in deep tide pools, on shallow sublittoral rocks, and in kelp forests. Despite sharing the character of interlaced medullary filaments with Alatocladia, rbcL molecular sequence data does not support a sister taxon relationship with Calliarthron.
Numbers of names and species: There are 13 species names in the database at present, of which 2 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.
Gabrielson, P.W., Miller, K.A. & Martone, P.T. (2011). Morphometric and molecular analyses confirm two distinct species of Calliarthron (Corallinales, Rhodophyta), a genus endemic to the northeast Pacific. Phycologia 50(3): 298-316.
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: 29 December 2000 by M.D. Guiry
Verified by: 09 June 2011 by Paul Gabrielson
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=36448
Please cite this record as:
Paul Gabrielson in Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 20 January 2019.