Lectotype species: Arthrocardia corymbosa (Lamarck) Decaisne
Original publication:Decaisne, J. (1842). Essais sur une classification des algues et des polypiers calcifères de Lamouroux. Annales des Sciences Naturelles, Botanique, Seconde série 17: 297-380, pls 14-17.
Type designated in Manza, A.V. (1940). A revision of the genera of articulated corallines. Philippine Journal of Science 71: 239-316, 20 pls.
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.
"Incertae sedis Corallineae and Janieae" (Athansiadis 2016: 354). - (20 Jan 2017) - M.D. Guiry
Description: Thalli comprising extensive crustose holdfasts bearing one to several erect, branched, articulated fronds. Fronds of calcified intergenicula separated by uncalcified genicula. Branching pinnate in vegetative parts, dichotomous in fertile parts. Intergenicula of arching tiers of straight medullary cells surrounded by a photosynthetic cortex and unistratose layer of epithallial cells. 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, but probably present. Reproductive cells forming within conceptacles originating in medullary meristems at branch apices in line with branch axes (axial conceptacles). At maturity, a single deeply embedded conceptacle terminating axis of each fertile intergeniculum. Conceptacle pores central or subapical. Fertile intergenicula bearing two branches, one on each side of pore. These branches may continue to bear conceptacles and branch again. Pseudolateral conceptacles lacking. Tetrasporangial conceptacles containing >30 mature tetrasporangia prior to spore discharge. Bisporangia unknown. Sexual plants dioecious. Pore of each spermatangial conceptacle opening at tip of short or long beak projecting from roof. Carpogonial conceptacles with extensive layer of supporting cells with carpogonial filaments. Carposporangial conceptacles containing broad, thin fusion cells with gonimoblast filaments arising from upper surface. Spores presumably germinating into crustose sporelings by the Corallina-type of spore germination. Common in southern Africa; less common in India, in southern Australia, and in Brazil. One species occurs on the west coast of North America.
Information contributed by: H.W. Johansen. The most recent alteration to this page was made on 20 Jan 2017 by M.D. Guiry.
Comments: Arthrocardia appears most closely related to Corallina, especially in view of the pinnate branching in both genera. The ancestors of Arthrocardia probably diverged from Corallina with the evolution of branching systems of fertile intergenicula, which may be extensive in highly fertile fronds. The intergenicula of most species of Arthrocardia are larger than those in Corallina, and there may be as many as 40 tiers of medullary cells per intergeniculum, versus 20 or fewer in Corallina
Numbers of names and species: There are 31 species names in the database at present, as well as 1 infraspecific names. Of the species names, 10 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: 20 January 2017 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=34485
Please cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2019. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 26 March 2019.