<i>Microcladia exserta</i>sp. nov. (Ceramiaceae, Rhodophyta) from the East coast of South Africa

Wynne, Michael J.

doi:10.1080/00071618500650201

Cited by 7 publications

(12 citation statements)

References 12 publications

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“…M. gelidii is a South African east coast species and, according to Simons (1967), it has axial cells a little wider than high and 6-7(-9) pericentral cells; these features distinguish M. gelidii from the other two species. M. exserta was described by Wynne (1985a) from Natal, and its South African distribution is restricted to the east coast (Bolton and Stegenga, 1987;Anderson and Stegenga, 1989;Farrell et al, 1993). According to Wynne's (1985a) iconography and description, this species is very similar to M. gloria-spei and, although Stegenga (1986) did not comment it, M. exserta also have exserted tetrasporangia.…”

Section: Genus Microcladia Greville (1830)mentioning

confidence: 97%

“…M. exserta was described by Wynne (1985a) from Natal, and its South African distribution is restricted to the east coast (Bolton and Stegenga, 1987;Anderson and Stegenga, 1989;Farrell et al, 1993). According to Wynne's (1985a) iconography and description, this species is very similar to M. gloria-spei and, although Stegenga (1986) did not comment it, M. exserta also have exserted tetrasporangia. However, M. exserta can be differentiated from M. gloria-spei by the distinctive traits already commented by Stegenga (1986) and because in the former, the cortex consists only of a single layer of cells, whereas in the latter it consists of 2-4 cell layers (Stegenga, 1986).…”

Section: Genus Microcladia Greville (1830)mentioning

confidence: 97%

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Marine benthic algae of Namibia

Lluch

2002

Sci. Mar.

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SUMMARY: The first comprehensive study of the marine algal flora of Namibia including descriptions and illustrations of most species is presented. The main objective of this work is to report a flora that, until now, has scarcely been studied. The work compiles all the available information on the marine benthic flora of Namibia and provides new data about it composition and biogeography, as well as detailed descriptions and remarks of most of its species. The samples on which this study is based were collected between 1986 and 1989 in the eulittoral and the upper sublittoral zones of the north half of the Namibian coast. According to the present data, the marine benthic flora of Namibia comprises 196 taxa (147 Rhodophyceae, 20 Phaeophyceae, 15 Ulvophyceae, 6 Cladophorophyceae and 8 Bryopsidophyceae), 21 of which has not been recorded from this coasts. This temperate flora is mainly characterized by a low number of species, a low proportion of Phaeophyceae and a high degree of endemism. Concerning the species number, the flora is quite poor due to both the scarce availability of colonizable substratum and the low diversity of habitats. On the other hand, the low proportion of Phaeophyceae is the reason for which the R/P and (R+C)/P ratios take disproportionately high values and so they are not useful in this geographical area. As regards the degree of endemism, the marine benthic flora of Namibia includes quite a high number of taxa endemic to southern Africa (55 taxa; 28.1% of the flora); 25 of these 55 taxa (12.8% of the flora) are endemic to the biogeographic Benguela Marine Province and only Acrosorium cincinnatum is endemic to the Namibian coasts.Key words: Namibia, marine algae, morphology and anatomy, distribution, biogeography, taxonomy, check-list. RESUMEN: ALGAS BENTÓNICAS MARINAS DE NAMIBIA. -Este trabajo recoge toda la información existente hasta el momento sobre la flora bentónica marina de Namibia y proporciona nuevos datos sobre su composición y biogeografía, además de descripciones detalladas y valoraciones críticas de muchas de sus especies. El trabajo se ha realizado a partir de muestras florísticas recolectadas entre los años 1986 y 1989 en las zonas eulitoral y sublitoral superior de la costa de la mitad norte del país, entre Walvis Bay y la desembocadura del río Kunene. Según los datos actuales, la flora bentónica marina de Namibia está representada por 196 táxones (147 Rhodophyceae, 20 Phaeophyceae, 15 Ulvophyceae, 6 Cladophorophyceae y 8 Bryopsidophyceae), 21 de los cuales no habían sido citados hasta el momento de las costas de este país. Se trata de una flora de carácter templado que se caracteriza principalmente por el bajo número de especies, la escasa proporción de feofíceas y el elevado grado de endemismo. En cuanto al número de especies, la flora de Namibia es relativamente pobre, debido a la escasa disponibilidad de substrato colonizable y a la baja diversidad de hábitats. Por otra parte, la baja proporción de feofí-ceas hace que los índices R/P y (R+C)/P adopten valores desproporc...

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Section: Genus Microcladia Greville (1830)mentioning

confidence: 97%

Section: Genus Microcladia Greville (1830)mentioning

confidence: 97%

Marine benthic algae of Namibia

Lluch

2002

Sci. Mar.

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“…The genus Microcladia was established by Greville (1830) and the type species M. glandulosa (Solander ex Turner) Greville is based on Fucus glandulosus Solander ex Turner (1808). The shared features between Microcladia and Herpochondria are bilaterally compressed fronds, involucrate cystocarps, and a ramification pattern (Okamura, 1900;Wynne, 1985). Kylin (1956) and Itono (1977) emphasized the prostrate habit of Herpochondria in contrast to erect habit of Microcladia.…”

Section: Discussionmentioning

confidence: 99%

“…Kylin (1956) and Itono (1977) emphasized the prostrate habit of Herpochondria in contrast to erect habit of Microcladia. However, Wynne (1985) indicated that Microcladia glandulosa and M. exserta Wynne showed also a prostrate habit, so that the generic separation was highly questionable. Although the prostrate habit may not be a diagnostic character, Itono (1977) considers two lateral and four transverse periaxial cells in each axial segment, and tetrasporangia on stichidial branches as the other significant characters of Herpochondria.…”

Section: Discussionmentioning

confidence: 99%

Vegetative and reproductive morphology of Herpochondria corallinae (Martens) Falkenberg and H. elegans (Okamura) Itono (Ceramiaceae, Rhodophyta) from Korea

Keum

Lee

1993

Hydrobiologia

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The vegetative and reproductive morphology of two epiphytic Herpochondria species, H. corallinae (Martens) Falkenberg (the type species) and H. elegans (Okamura) Itono from Korea were investigated. They are bilaterally compressed and alternate-distichously branched, and lateral branches are produced by oblique divisions of the apical cell. Procarps are restricted to the first periaxial cell of the branches. Spermatangial mother cells produce one or two spermatangia. H. corallinae forms tetrasporangia on six periaxial cells, whereas H. elegans has them on only the two lateral periaxial cells. The prostrate habit, the production of six periaxial cells in opposite pairs, and tetrasporangial stichidia are confirmed as diagnostic characters of the genus Herpochondria.J. Gonimoblasts in two adjacent segments (aux, auxiliary cell; ax, axial cell; ft, foot cell; gll, g12, the 1st and 2nd gonimolobe cells; invi, involucral branch initial; p, periaxial cells; stl, st2, the 1st and 2nd sterile cells; su, supporting cell; tr, trichogyne).

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“…Large, common, algae Could usually be identified using Simons (1976); some species, however, required the use of other taxonomic publications. Kylin (1938), Levring (1938), Papenfuss (1947), Silva (I959), Simons (1966), Jaasund (1976), Lawson & John (1982), Norris & Aken (I985), Wynne (1985), Norris (1986), Lambert et al (1987), Norris (1987aNorris ( , 1987bNorris ( , 1987c, Norris et al {1987), Norris & Molloy (1988), and King & Puttock (1989) were consulted when Simons (1976) proved unsatisfactory.…”

Section: Collection Site and Methodsmentioning

confidence: 99%

The intertidal algal flora of Isipingo Beach, Natal, South Africa, and its phycogeographical affinities

Farrell

Critchley

Aken

1993

Helgolander Meeresunters

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The intertidal seaweed flora of Isipingo Beach, Natal, is described. Isipingo Beach hes on the sub-tropical east coast of southern Africa and is the only east coast locality studied in detail by pioneering biogeographers. A total of 172 species (37 chlorophytes, 26 phaeophytes and 109 rhodophytes) are recorded. A phycogeographical analysis of 124 species with sufficiently documented distributions, shows that 69 % are warm water species also known from the tropical coasts of Mozambique, Tanzania and Kenya. The phycogeographical affinity of the Isipingo flora is certainly with sub-tropical and tropical floras.

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Microcladia exsertasp. nov. (Ceramiaceae, Rhodophyta) from the East coast of South Africa

Cited by 7 publications

References 12 publications

Marine benthic algae of Namibia

Marine benthic algae of Namibia

Vegetative and reproductive morphology of Herpochondria corallinae (Martens) Falkenberg and H. elegans (Okamura) Itono (Ceramiaceae, Rhodophyta) from Korea

The intertidal algal flora of Isipingo Beach, Natal, South Africa, and its phycogeographical affinities

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