Monogononta
| Monogononta | ||||||||||
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Polyarthra |
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| Systematics | ||||||||||
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| Scientific name | ||||||||||
| Monogononta | ||||||||||
| Plate , 1889 |
The Monogononta are a subclass of the rotifers (Rotatoria, Rotifera). They live mainly planktonic and move around with well-developed wheel organs. The name-giving characteristic of the group is its only gonad . The Monogononta have two polynuclear foot glands.
Reproduction
They go through a generation change in which an amictic, parthenogenetic female generation , which lay diploid eggs with two complete sets of chromosomes and only one polar body, and a mictic female generation, which lay haploid eggs with only one chromosome set and two polar bodies, alternate. Amictic females hatch from the fertilized, haploid eggs, from the unfertilized males, which are usually smaller than the females and usually only have an incomplete intestine without function. If a favorable biotope is repopulated or if the living conditions change for the better, the females can reproduce parthenogenetically over several generations for rapid colonization.
Internal system
- Superorder Gnesiotrocha, many sessile species living in a tube, others planktonic
- Order Collothecida Harring, 1913
- Order Flosculariida Harring, 1913
- Superorder Pseudotrocha, the majority of the species, all freely moving, planktonic or on aquatic plants
- Order Ploima Hudson & Gosse, 1886
- Family Asciaporrectidae
- Family Asplanchnidae
- Family Birgeidae
- Brachionidae family
- Family Clariaidae
- Family Conochilidae
- Family Cotylegaleatidae
- Family Dicranophoridae
- Family Epiphanidae
- Family Euchlanidae
- Family Gastropodidae
- Ituridae family
- Family Lecanidae
- Family Lepadellidae
- Family Lindiidae
- Family Microcodidae
- Mytilinidae family
- Family Notommatidae
- Family Proalidae
- Family Scaridiidae
- Synchaetidae family
- Family Testudinellidae
- Family Tetrasiphonidae
- Family Trichocercidae
- Family Trichotriidae
- Family Trochosphaeridae
- Order Ploima Hudson & Gosse, 1886
A representative is, for example, Trichocerca .
literature
- Hynek Burda , Gero Hilken, Jan Zrzavý: Systematic Zoology. UTB, Stuttgart; : 1st edition 2008, page 102, ISBN 3825231194
- Wilfried Westheide , Reinhard Rieger (Hrsg.): Special zoology. Part 1: Protozoa and invertebrates. (2nd ed.). Elsevier, Spektrum Akademischer Verlag, Munich 2007, ISBN 3-8274-1575-6 .
Individual evidence
- ↑ Wissenschaft-online: Keyword amictic
Web links
- Segers, H. (2009). Monogononta. In: Segers, H. (Ed.) (2009). World Rotifera database from FADA. World Register of Marine Species