Claudea is a marine red alga genus.
| Claudea | |
|---|---|
| |
| Claudea elegans | |
Scientific classification 
| |
| Clade: | Archaeplastida |
| Division: | Rhodophyta |
| Class: | Florideophyceae |
| Order: | Ceramiales |
| Family: | Delesseriaceae |
| Genus: | Claudea J.V. Lamouroux |
| Species | |
|
Claudea batanensis Tanaka | |
Taxonomy and Nomenclature
editThe genus was named for Claude Lamouroux, father of Jean Vincent Félix Lamouroux. Claude was born in Agen in 1741.[1][2]
The genus of Claudea was circumscribed by Jean Vincent Félix Lamouroux in Ann. Mus. Natl. Hist. Nat. vol.20 on page 121 in 1813.
Species
editCurrently there are 4 species in the Algaebase, where Claudea bennettiana Harvey is considered as homotypic or heterotypic species. Claudea elegans J.V.Lamouroux is the holotype species.[1]
- Claudea batanensis Tanaka
- Claudea bennettiana Harvey
- Claudea elegans J.V.Lamouroux
- Claudea multifida Harvey
Morphology
editAccording to the description presented in electronic flora of South Australia, "the thallus was described with net-like fronds, the stipes can be long or short developed from the midrib of the nets. The holdfast was described to be discoid to conical pseudoparenchymatous; epilithic or epiphytic. The apices of fronds formed a dome-shaped apical cell segmenting to give an axial filament, where each cell contains 4 pericentral cells (2 lateral cells cut off first followed by 2 transverse pericentral cells), lateral pericentral cells developing second-order rows with their inner cells forming third-order rows, with all second and third-order rows reaching the blade margin; fourth-order rows occasionally present marginally. The lateral pericentral cells develop wings 1–2 mm broad. The upper (adaxial) transverse pericentral cells each produce a secondary blade with similar apical development, of which each adaxial transverse pericentral cell produces a row of cells which connect to the lower (abaxial) transverse pericentral cells of the secondary frond above, with all cells except the apical adherent one developing flat blades as in primary and secondary axes. These tertiary blades and their interstices form the network of the fronds and similar branching of the tertiary blades forms quaternary blades with smaller networks. Cortication of the axes commences some distance below the apices and becomes thick on lower axes from which the wings are lost."[3]
Distribution
editA genus with 3 recognized species, the C. multifida was collected by Harvey from the northern Indian Ocean and reported also Andaman Island, India, Sri Lanka, Philippines, China, Taiwan and Federated States of Micronesia. The C. batanensis specimens were reported from South-east Asia: Philippines,Vietnam and Asian region particularly in South China Sea, and Taiwan.[1]
Ecology
editBased on Tanaka (1967) the C. batanensis grows on the tube of Polychaete associated with other algae like Acanthophora aokii Okamura in rather deep sea.[4]
Life history/Reproduction
editBased from the electronic flora of South Australia, “the gametophytes is dioecious. Procarps (in C. multifida) borne on abaxial transverse pericentral cells, usually on successive cells, with 2 sterile groups and a 4-celled carpogonial branch. Carposporophyte with a basal fusion cell, much branched gonimoblast, and clavate to ovoid terminal carposporangia. Cystocarps dome-shaped to ovoid, borne singly on distinct pedicels; pericarp ostiolate, corticate. Spermatangial sori formed on tertiary or quaternary blades, with sterile midribs and margins, with initials cut off from second- and third-order rows producing an outer layer of spermatangia.”[3][5]
Tetrasporangial sori formed on tertiary and quaternary blades, with tetrasporangia cut off from second-order cells in a single (or displaced to two) layer (from cortical cells also in C. multifida), with cover cells on each side of the blade dividing to form a continuous cortical layer; tetrasporangia subspherical, tetrahedrally divided.[3][5]
Other notes
editExploitation/harvesting/cultivation: Although considered in literature as rare, no cultivation of the genus was recorded Chemical composition/natural products chemistry: No available literature on the chemical composition of the three species within the genus.
References
edit- ^ a b c "Algaebase :: Listing the World's Algae". www.algaebase.org. Retrieved 21 January 2022.
- ^ Burkhardt, Lotte (2022). Eine Enzyklopädie zu eponymischen Pflanzennamen [Encyclopedia of eponymic plant names] (pdf) (in German). Berlin: Botanic Garden and Botanical Museum, Freie Universität Berlin. doi:10.3372/epolist2022. ISBN 978-3-946292-41-8. S2CID 246307410. Retrieved 27 January 2022.
- ^ a b c "Claudea, State Herbarium of South Australia". www.flora.sa.gov.au. Retrieved 21 January 2022.
- ^ Tanaka, T (1967). "Some marine algae from Batan and Camiguin Islands, Northern Philippines". I. Mem. Fac. Fish. Kagoshima Univ. 16: 13–27 – via Kagoshima University Repository.
- ^ a b Papenfuss, George F. (March 1961). "The Structure and Reproduction of Caloglossa leprieurii". Phycologia. 1 (1): 8–31. doi:10.2216/i0031-8884-1-1-8.1. ISSN 0031-8884.
http://www.flora.sa.gov.au/efsa/Marine_Benthic_Flora_SA/Part_IIID/Claudea.shtml M.D. Guiry in Guiry, M.D. & Guiry, G.M. 17 February 2014. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. https://www.algaebase.org; searched on 21 January 2022.
Other sources
edit- Harvey, W.H. (1854). New Algae from Ceylon. Journ. Bot. (Hooker) 6, 143–145, Plates 5–6.
- Papenfuss, G.F. (1937). The structure and reproduction of Claudea multifida, Vanvoorstia spectabilis and Vanvoorstia coccinea. Synth. Bot. Upsal. 2(4): 1–66.
- Tanaka, T. (1967). Some marine algae from Batan and Camiguin Islands, Northern Philippines — I. Mem. Fac. Fish. Kagoshima Univ. 16, 13–27.