Dichotomaria Lamarck, 1816: 143
Lectotype species: Dichotomaria marginata (J.Ellis & Solander) Lamarck
Original publication:Lamarck, [J.B.A.P.] De (1816). Histoire naturelle des animaux sans vertèbres, présentant les caractères généraux et particuliers de ces animaux, leur distribution, leurs classes, leurs familles, leurs genres, et la citation des principales espèces qui s'y rapportent; précédée d'une introduction offrant la détermination des characteres essentiels de l'Aanimal , sa distinction du végétal et des autres corps naturels, enfin , l'eexposition des principes fondamentaux de la Zoologie. Tome second. pp. 1-568. Paris: Verdière, Libraire, quai des Augustins, No. 27.
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Type designated inHuisman, J.M., Harper, J.T. & Saunders, G.W. (2004). Phylogenetic study of the Nemaliales (Rhodophyta) based on large-subunit ribosomal DNA sequences supports segregation of the Scinaiaceae fam. nov. and resurrection of Dichotomaria Lamarck. Phycological Research 52(3): 224-234. Download PDF
Taxonomic status: currently recognized as a distinct genus.
notes
Genus emended by Wang, Liu & Lin (2005: 688). - (31 Jul 2006) - Wendy Guiry
Description: According to Wang et al. (2005: 699), the resurrected genus Dichotomaria is characterized by 1) gametophytes and tetrasporophytes that are isomorphic in habit but differ in cortical-cell features; 2) a three-celled corpogonial branch in which, following fertilization, the basal cell produces involucral filaments that ultimately form the pericarp; 3) a multinucleate fusion cell that incorporates the gonimoblast initial and the three to four inner gonimoblast cells; and 4) cruciate tetrasporangia produced on stalk cells initiated from cortical or subcortical cells. Full, emended description on p. 688 (Wang et al., 2005).
Comments: Dichotomaria Lamarck resurrected by Huisman et al (2004a). Description emended by Wan, Liu & Lin (2005: 688).
NCBI Nucleotide Sequences
Numbers of names and species: There are 22 species (and infraspecific) names in the database at present, of which 11 have been flagged as currently accepted taxonomically.
Names: ('C' indicates a name that is currently 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):
Dichotomaria alterna Lamarck C
Dichotomaria apiculata (Kjellman) A.Kurihara & Masuda C
Dichotomaria australis (Sonder) Huisman, J.T.Harper & G.W.Saunders C
Dichotomaria ceranoides (J.V.Lamouroux) Blainville C
Dichotomaria corniculata Lamarck C
Dichotomaria diesingiana (Zanardini) Huisman, J.T.Harper & G.W.Saunders C
Dichotomaria divaricata Lamarck C
Dichotomaria falcata (Kjellman) Kurihara & Masuda C
Dichotomaria foeniculacea Lamarck C
Dichotomaria fragilis Lamarck S
Dichotomaria fruticulosa (J.Ellis & Solander) Lamarck C
Dichotomaria lapidescens (J.Ellis & Solander) Lamarck S
Dichotomaria lenta (Kjellman) Huisman, J.T.Harper & G.W.Saunders C
Dichotomaria marginata var. linearis (Kützing) M.J.Wynne C
Dichotomaria marginata var. dilatata (Kützing) M.J.Wynne C
Dichotomaria marginata (J.Ellis & Solander) Lamarck C - type
Dichotomaria obtusata var. major (W.R.Taylor) M.J.Wynne C
Dichotomaria obtusata (J.Ellis & Solander) Lamarck C
Dichotomaria papillata (Kjellman) Kurihara & Masuda C
Dichotomaria spathulata (Kjellman) A.Kurihara & Huisman C
Dichotomaria tenera (Kjellman) Huisman, J.T.Harper & G.W.Saunders C
Dichotomaria usnealis Lamarck C
References
Kurihara, A., Arai, S., Shimada, S. & Masuda, M. (2005). The conspecificity of Galaxaura apiculata and G. hystrix (Nemaliales, Rhodophyta) inferred from comparative morphology and rbcL, and ITS1 sequences. European Journal of Phycology 40: 39-52.
Wynne, M.J. & Schneider, C.W. (2010). Addendum to the synoptic review of red algal genera. Botanica Marina 53: 291-299.
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.
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=44075
Citing AlgaeBase
Cite this record as:
M.D. Guiry in Guiry, M.D. & Guiry, G.M. 2013. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 19 May 2013.
Algaebase taxon LSID: urn:lsid:algaebase.org:taxname:6592
