Reproductive morphology and life histories of Southern African<i>Gymnogongrus</i>species (Rhodophyta, Phyllophoraceae)

Anderson, R. J.; Bolton, John J.

doi:10.1080/00071619000650431

Cited by 7 publications

(7 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, there are some Swakopmund specimens of a crustose Rhodophyceae which could belong to the tetrasporophytic stadium of either of these two species or A. polyclada (Kützing) P. Silva and DeCew, the latter recorded from Namibia by Anderson and Bolton (1990). According to these authors, the tetrasporophytes of these species are morphologically and anatomically very similar and therefore difficult to distinguish.…”

Section: Kallymenia Schizophyllamentioning

confidence: 99%

“…One of them (Polysiphonia namibiensis) is described as a new species from material collected in this country; others are cited in this geographical area for the first time, although in most cases the authors do not specify the origin of the samples and do not refer to any other work. Apart from these works, which represent an important advance in the knowledge of the Atlantic flora of southern Africa, scarcely documented until then, there are other works that give information about the distribution of some of the cited species of Namibia, such as the ones by Anderson and Bolton (1990) and Levitt et al (1995).Finally, it is also worth mentioning the works by , John et al (1994) and Lawson et al (1995) about marine algae of the Atlantic coast of tropical Africa, in which, among others, we can find the citations of certain species of red algae from Namibia. …”

mentioning

confidence: 99%

“…According to Anderson and Bolton (1990), the presence of short branchlets (0.5-1 cm long) unilaterally arranged in the axes characterize this species. This feature, on the other hand, distinguishs A. polyclada from A. vermicularis.…”

mentioning

confidence: 99%

“…Ahnfeltiopsis vermicularis (C. Agardh) P. References: Kützing (1867), Simons (1976), Anderson and Bolton (1990), .…”

mentioning

confidence: 99%

“…References: Papenfuss (1943), Simons (1976), Branch and Branch (1981), Wynne (1986), Anderson and Bolton (1990), .…”

mentioning

confidence: 99%

See 4 more Smart Citations

Marine benthic algae of Namibia

Lluch

2002

Sci. Mar.

View full text Add to dashboard Cite

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...

show abstract

Section: Kallymenia Schizophyllamentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

“…Ahnfeltiopsis vermicularis (C. Agardh) P. References: Kützing (1867), Simons (1976), Anderson and Bolton (1990), .…”

mentioning

confidence: 99%

“…References: Papenfuss (1943), Simons (1976), Branch and Branch (1981), Wynne (1986), Anderson and Bolton (1990), .…”

mentioning

confidence: 99%

See 3 more Smart Citations

Marine benthic algae of Namibia

Lluch

2002

Sci. Mar.

View full text Add to dashboard Cite

show abstract

Contribution to the seaweed flora of Namibia: new records of Chlorophyta and Phaeophyceae

Lluch

Garreta

2001

Cryptogamie Algologie

View full text Add to dashboard Cite

The life history of Ahnfeltiopsis paradoxa (Gigartinales, Rhodophyta) in laboratory culture

Masuda

Shimizu

Kogame

1997

Phycological Research

View full text Add to dashboard Cite

SUMMARY The life history of the red alga Ahnfeltiopsis paradoxa (Suringar) Masuda (Phyllophoraceae, Gigartinales) from Japan was completed in laboratory culture. Carpospores isolated from field‐collected plants germinated to form circular crusts that were composed of a monostromatic hypothallium consisting of radiating filaments, a polystromatic perithallium consisting of tightly coalescent erect filaments, and hypobasal tissue derived from the hypothallium. The crusts were induced to sporulate by transferring them from short‐day to long‐day regimes at 15° and 2°C. Each crust produced several nemathecia along 1‐4 concentric rings. Intercalary, cruciately or decussately divided tetrasporangia were formed in 4‐6 (1‐2 at the margin of the nemathecium) successive cells of a single filament of the nemathecia. Tetraspore germlings gave rise to basal discs from which upright axes developed. The upright axes first grew without branches or were sparsely branched and later bore many marginal reproductive proliferations. Procarps and spermatangia were formed in the proliferations on different individuals. Carposporophytes developed on female plants that were co‐cultured with male plants. Gonimoblast filaments were formed from an auxiliary cell that fused with a carpogonium. Carposporangia developed from gonimoblast filaments and medullary cells contacted by the gonimoblast filaments. Carpospores were discharged through carpostomes formed in the thickened cortex. Tetraspores were cultured from field‐collected crusts of a morphology similar to that of cultured tetrasporophytes. They gave rise to upright gametophytic axes similar in morphology to this species as seen in the field.

show abstract

Reproductive morphology and life histories of Southern AfricanGymnogongrusspecies (Rhodophyta, Phyllophoraceae)

Cited by 7 publications

References 15 publications

Marine benthic algae of Namibia

Marine benthic algae of Namibia

Contribution to the seaweed flora of Namibia: new records of Chlorophyta and Phaeophyceae

The life history of Ahnfeltiopsis paradoxa (Gigartinales, Rhodophyta) in laboratory culture

Contact Info

Product

Resources

About