Blasiaceae
Blasiaceae | ||||||||||||
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Systematics | ||||||||||||
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Scientific name of the class | ||||||||||||
Blasiopsida | ||||||||||||
Stech & Frey | ||||||||||||
Scientific name of the order | ||||||||||||
Blasiales | ||||||||||||
Stotler & Crand.-Stotl. | ||||||||||||
Scientific name of the family | ||||||||||||
Blasiaceae | ||||||||||||
Klinggr. |
The Blasiaceae are a family of liverworts with only two species and are now placed in a class of their own, the Blasiopsida.
features
The thallus is simply built and has two rows of lamellar scales on the underside. The structure of the gametophyte - sporophyte connection and the blepharoplast is similar to that of the Marchantiopsida . The spermatozoids are built in the same way as those of Marchantia and the Sphaerocarpales .
Systematics
External system
The systematic position of the Blasiaceae is not finally clarified. Because of the gametophyte-sporophyte connection, the family is considered by some authors to belong to the Marchantiopsida. Other authors place Blasia in the Metzgeriales on the basis of studies of the 25S rDNA , while pedigrees with the trn L-Intron make Blasia appear as a separate developmental branch , which is why they are listed as a separate class.
Internal system
The class consists of two monotypical genera:
- Blasia pusilla L. is also found in Europe. It lives in symbiosis with Nostoc colonies, forms brood bodies and has no oil bodies
- Cavicularia densa Steph.
literature
- Jan-Peter Frahm: Biology of Mosses . Spectrum Academic Publishing House, Heidelberg and Berlin 2001, ISBN 3-8274-0164-X .
- Jan-Peter Frahm, Wolfgang Frey, J. Döring: Moosflora . 4th, revised and expanded edition (UTB for Science, Volume 1250). Ulmer, Stuttgart 2004, ISBN 3-8001-2772-5 (Ulmer) & ISBN 3-8252-1250-5 (UTB).
Individual evidence
- ↑ JMPass, KS Renzaglia: Comparative microanatomy of the locomotory apparatus of Conocephalum. in: Fragm. Flor. Geobot. Volume 40, 1995, pp. 365-377.
- ^ JA Wheeler: Molecular phylogenetic reconstruction of the marchantioid liverwort radiation. in: The Bryologist, Volume 103, 2000, pp. 314-333.
- ↑ M. Stech, W. Frey: CpDNA-relationship and classification of the liverworts (Hepaticophytina, Bryophyta) . in: Nova Hedwigia 2001.