Zooplankton of the open Baltic: Extended Atlas - IOW

5.2. Checklist of meso- and macrozooplankton of the open Baltic
Sea
The checklist of zooplankton organisms larger than 200 µm inhabiting
different regions of the open Baltic Sea is given in Table 5.2.1.
In most cases only valid species names and their most common
synonyms are included in the table, without indication of the names of
subspecies, forms or varieties which sometimes may be numerous within a
certain species, like for example in the rotifer genera Brachionus and
Keratella.
Basing on our previous publications on the estuarine zooplankton of the
Baltic Sea (Telesh & Heerkloss, 2002, 2004) we admit that a number of
zooplankton species which are not indicated in this checklist or those
mentioned as “not present” in a certain area in fact may occur there but they
either have not been found/sampled yet or were identified only by the genus
name.
In total, 217 taxa of holoplanktonic animals (Cnidaria – 15, Ctenophora
– 5, Turbellaria – 1, Rotifera – 83, Cladocera – 37, Copepoda – 63, Pteropoda
– 1, Polychaeta – 7, Chaetognatha – 3, Copelata – 2) generally belonging to
meso- and macrozooplankton are included in the checklist, and more than
30% of these organisms are illustrated by the photographs (see Chapter 5.3).
Rotifers are conventionally considered here as mesozooplankters,
contrary to ciliates that are representing microzooplankton; the latter were
described above in a separate Chapter 4.
Species names and synonymy of Rotifera are given after Kutikova
(1970) and Koste (1978), names and synonyms of other species – according
to the Integrated Taxonomic Information System (ITIS, http://www.itis.gov),
the European Register of Marine Species (ERMS, http://www.marbef.org/
data/erms.php), and the World Register of Marine Species (WoRMS,
http://www.marinespecies.org).
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