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| one publication added to basket [208814] |
Morphology and systematics of two aberrant species of Dictyota (Dictyotaceae, Phaeophyta), including a discussion on the generic boundaries in the tribe Dictyoteae
De Clerck, O.; Coppejans, E. (2003). Morphology and systematics of two aberrant species of Dictyota (Dictyotaceae, Phaeophyta), including a discussion on the generic boundaries in the tribe Dictyoteae, in: Proceedings of the XVIIth International Seaweed Symposium, Cape Town 2001. pp. 275-284
In: (2003). Proceedings of the XVIIth International Seaweed Symposium, Cape Town 2001. Oxford University Press: [s.l.]. , meer
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| Trefwoorden |
Dictyota J.V.Lamouroux, 1809 [WoRMS]; Dictyotaceae Lamouroux ex Dumortier, 1822 [WoRMS]
Marien/Kust |
| Author keywords |
Dictyota; Dictyotaceae; morphology; systematics; generic boundaries |
| Abstract |
Dictyota naevosa (Suhr) Montagne and D. radicans Harvey possess characters that do not conform to the generic description of Dictyota. The generic boundaries in the tribe Dictyoteae are thus called into question. Dictyota naevosa differs from other Dictyota species by having more than one layer of cortical cells in the lower part of the thallus. The presence of a multilayered cortex is the only character distinguishing Pachydictyon from Dictyota. Dictyota radicans is characterised by the presence of terete surface proliferations, a feature used to distinguish Glossophora from Dictyota. Both D. naevosa and D. radicans have clear sister species that are currently placed in the genus Dilophus. The segregation of Dilophus from Dictyota, as still advocated by some authors, therefore becomes untenable. The morphological evidence leads us to question the generic status of Pachydictyon, Glossophora and Glossophorella, since the characters used to delineate these genera are commonly found in some species of Dictyota. |
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