Book contents
- Frontmatter
- Contents
- Acknowledgements
- I Introduction
- II History of research on Polish rotifers and the present state of their knowledge
- III General Part
- IV Systematic part: a key for the identification of monogonont rotifers of Poland
- V Alphabetical survey of species
- VI A survey of species not yet recorded in Poland but reported from neighbouring countries
- VII. References
- VIII. Index of scientific names
- IX. List of synonyms used in the Polish literature
- X Annex
- XI. Autors
IV - Systematic part: a key for the identification of monogonont rotifers of Poland
Published online by Cambridge University Press: 12 January 2018
Book contents
- Frontmatter
- Contents
- Acknowledgements
- I Introduction
- II History of research on Polish rotifers and the present state of their knowledge
- III General Part
- IV Systematic part: a key for the identification of monogonont rotifers of Poland
- V Alphabetical survey of species
- VI A survey of species not yet recorded in Poland but reported from neighbouring countries
- VII. References
- VIII. Index of scientific names
- IX. List of synonyms used in the Polish literature
- X Annex
- XI. Autors
Summary
The systematic part contains a survey of rotifer taxa down to, and inclusive of, the genus level. Due to the very difficult, and not completely explained, rotifer taxonomy at the infrasubspecific level, it was consciously decided to leave out species identification keys. However, the catalogue of rotifers known at present from Poland (part V of the Freshwater Fauna of Poland), is an excellent companion to this chapter and an aid in rotifer species identification.
Key to subclasses
1. Ovary paired, trophi ramate …………Bdelloidea
– Ovary unpaired, trophi different ……….Monogononta
SUBCLASS: MONOGONONTA
Monogonont rotifers have an unpaired ovary, with a clearly separated vitellarium. Their development is typically heterogonous, but, hermaphroditic reproduction does sporadically appear. Monogononts are the most widely distributed rotifer groups; they occur in both fresh and marine waters, and include more than 1500 species. They occupy various ecological niches and are members of different ecological communities: psammon, periphyton, and plankton; they also include typically sessile forms.
Key to orders
1. Trophi malleate, cardate, forcipate or incudate (Fig. 12) Ploimida p. 89
– Trophi of other type ………………………………….. 2
2. Trophi uncinate (Fig. 12 D). Corona Collotheca-type (Fig. 7 I) ………………………Collothecacea p. 80 – Trophi malleoramate (Fig. 12 F). Corona Hexarthra- or Conochilus-type (Fig. 7 E, D) …………………….. Flosculariacea p. 84
ORDER: COLLOTHECACEA REMANE, 1933
Foot without toes, in juveniles terminated with a tuft of setae. Numerous pedal glands, absent in adults. Corona reduced (Atrochidae) or greatly altered, of the Collotheca-type (Collothecidae). Trophi uncinate. Sessile and free-swimming forms.
Key to families
1. Corona without setae and long cilia (Fig. 23 B, C, D) Atrochidae p. 80
– Corona with long stiff setae (Fig. 23 F) ……Collothecidae p. 82
FAMILY: ATROCHIDAE Bartoš, 1959
The family consists of 3 monospecific genera, similar in having a corona with a limited number of cilia and in showing a characteristic opening of gastric glands. Fairly rare in Poland. All identifiable only when live.
Key to genera
Foot reduced to a small dorsal process; corona funnel-shaped; no lorica (Fig. 23 B) ………………… Cupelopagis Forbes, 1882
– Foot distinct ………………………………….. 2
Foot long, retractable; corona with large dorsal lobes; sheath small (Fig. 23 C) …..Acyclus Leidy, 1882
– Corona with short setae, foot segmented (Fig. 23 D) …………………Atrochus Wierzejski, 1893
Information
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- Rotifers (Rotifera)Freshwater Fauna of Poland, pp. 79 - 122Publisher: Jagiellonian University PressPrint publication year: 2017
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