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- Cosmochlaina (from Greek: kosmos=ornament; xlaina=wrapper/cloak) is a form genus of nematophyte – an early (Silurian – Devonian) plant known only from fossil cuticles, often found in association with tubular structures. The form genus was put forwards by Dianne Edwards, and is diagnosed by inwards-pointing flanges and randomly oriented pseudo-cellular units. Projections on the outer surface are always present, and sometimes also appear on the inner surface; however, the surface of the cuticle itself is always smooth. The holes in the cuticle are often covered by round flaps, loosely attached along a side. Where Nematothallus was sometimes used to relate only to tube-like structures, Cosmochlaina was used in reference to the cuticle fragments. Material discovered later revealed its internal anatomy, which comprises a lichen-like mat of 'hyphae'. It has been suggested that the pores of Cosmochlaina represent broken-off rhizoids, on the basis that rotting and acid treatment of extant liverworts produces a similar perforated texture. However, the status of this form genus in any one kingdom is not secure; members could, for example, represent arthropod cuticle. Alternatively, different species may in fact represent different parts of the same organism. Based on the more recent material, a lichen affinity seems most plausible. (en)
- Cosmochlaina é um género de nematófito, um tipo de plantas primitivas (Silúrico - Devónico) apenas conhecidas a partir das suas cutículas fossilizadas, muitas vezes encontrada em associação com estruturas tubulares. Onde Nematothallus é por vezes utilizado para relacionar apenas estruturas semelhantes a tubos, Cosmochlaina refere-se aos fragmentos de cutícula. Foi sugerido que os poros de Cosmochlaina representam rizóides quebrados, com base no facto de que a maceração ou decomposição de hepáticas extantes também produz uma textura perfurada similar. (pt)
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- Cuticle of Cosmochlaina, retrieved from the Burgsvik beds by acid maceration. Cells about 12 μm in diameter. (en)
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- *C. verruculosus
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* C. verrucosa
*C. maculata
*C. physema
*C. Versiformis
: (en)
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- Cosmochlaina é um género de nematófito, um tipo de plantas primitivas (Silúrico - Devónico) apenas conhecidas a partir das suas cutículas fossilizadas, muitas vezes encontrada em associação com estruturas tubulares. Onde Nematothallus é por vezes utilizado para relacionar apenas estruturas semelhantes a tubos, Cosmochlaina refere-se aos fragmentos de cutícula. Foi sugerido que os poros de Cosmochlaina representam rizóides quebrados, com base no facto de que a maceração ou decomposição de hepáticas extantes também produz uma textura perfurada similar. (pt)
- Cosmochlaina (from Greek: kosmos=ornament; xlaina=wrapper/cloak) is a form genus of nematophyte – an early (Silurian – Devonian) plant known only from fossil cuticles, often found in association with tubular structures. The form genus was put forwards by Dianne Edwards, and is diagnosed by inwards-pointing flanges and randomly oriented pseudo-cellular units. Projections on the outer surface are always present, and sometimes also appear on the inner surface; however, the surface of the cuticle itself is always smooth. The holes in the cuticle are often covered by round flaps, loosely attached along a side. (en)
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- Cosmochlaina (en)
- Cosmochlaina (pt)
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