Cladophoropsis Børgesen, 1905, nom. cons.
Lectotype species: Cladophoropsis membranacea (Hofman Bang ex C.Agardh) Børgesen
Original publication:Børgesen, F. (1905). Contributions à la connaissance du genre Siphonocladus Schmitz. Oversight Over Det Kgl Danske Videnskabernes Selskabs Forhandlingar 3: 259-291, 13 figs.
Type designated in Papenfuss, G.F. (1950). On the identity of Spongocladia and Cladophoropsis. Pacific Science 4: 208-213, 1 fig.
Taxonomic status: currently recognized as a distinct genus.
Most recent taxonomic treatment adopted: Leliaert, F. & Coppejans, E. (2006). A revision of Cladophoropsis Børgesen (Siphonocladales, Chlorophyta). Phycologia 45: 657-679.
Description: Thallus composed of interwoven filiform siphons forming mall cushions or extensive mats, often 1-2 cm thick and many meters wide. Cells 100-500 µm diameter to 1 cm long. Apical orientation replaced by diffuse branching pattern with development. Annular constrictions not present. Branches aseptate, secondarily septate; initiated from aseptate protrusions at distal ends of intercalary and apical segments, followed by elongation. Septations intercalary and/or at branch points. Lenticular cells absent. Rhizoid well developed from which new axes can arise. Adventitious rhizoids common, arising from branches in contact with substratum. Structural reinforcement of the thallus achieved by interweaving and rarely by tenacular cells. Cell division by segregative division and centripetal invagination in both the main axis and rhizoid. Cells multinucleate; chloroplasts numerous per cell and discoid, each with single pyrenoid surrounded by starch sheath and bisected by traversing thylakoid. Life history presumably a biphasic alternation of generations. Vegetative propagation via aplanospore products of segregative division is probable.
Information contributed by: J.L. Olsen & M.D. Guiry. The most recent alteration to this page was made on 19 Oct 2015 by M.D. Guiry.
Comments: Haploid and diploid chromosome numbers of 16 and 32 reported for C. macromeres, C. membranacea, and C. sundanensis. Nuclear DNA amounts of 2.1, 4.0-4.5 and 8.4-9.0 pg (1C, 2C and 4C) estimated for C. macromeres and C. membranacea.
Cladophoropsis is a common, pantropical marine genus. It is found in abundance during most of the year on shallow, reef-flats. Its favors habitats with good water motion; however, it may also be found in more quiet, lagoon-like habitats and in reef flat holes. Sequence analysis of nuclear rDNA in C. membranacea suggest east-west divergence of populations associated with an ancestral Tethyan distribution. Cladophoropsis was erected to accommodate seven species formerly assigned to Siphonocladus. Papenfuss merged Spongocladia and Cladophoropsis and proposed conservation of Cladophoropsis. Although a few species such as C. membranacea and C. luxurians are reasonably distinctive, the limits of the genus are unclear. This is attributable to the presence of few morphological characters and the confusion over the interpretation of septate and aseptate lateral branches which are key diagnostic features. Lateral branches are not strictly aseptate as has been claimed by most workers. Both types of lateral are common. Tenacular cells are present but uncommon. Lenticular cells (sensu Egerod) are absent. The sister taxa of Cladophoropsis are Boodlea and Struvea based on immunological distance and character compatibility analysis. Nuclear encoded rRNA sequence data place Cladophoropsis in the cladophoralean clade, but Boodlea and Struvea were not part of that study.
Numbers of names and species: There are 41 species names in the database at present, as well as 1 infraspecific names. Of the species names, 12 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.
Leliaert, F. & Coppejans, E. (2006). A revision of Cladophoropsis Børgesen (Siphonocladales, Chlorophyta). Phycologia 45: 657-679.
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: 19 October 2015 by M.D. Guiry
Linking to this page: http://www.algaebase.org/search/genus/detail/?genus_id=33603
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 25 March 2019.