The rotifer Notholca labis with an unusual growth form
Dear visitor,

The initial idea for this website came up when we wanted to document the ecological work of our highschool which is located in the southern part of the Ruhr-district in Germany, thereby creating an online catalogue of the species occuring in the surroundings of our school. The focus was on the microscopical life in aquatic freshwater environments, i.e. a small pond that has been surveyed for more than 10 years before it was replaced by a new pond. A nearby brook complements the biodiversity with species typical for lotic waters.

The first update followed when the biological (marine and terrestrial) results of our excursions to the mediterranean sea were added.

If one tries to identify microscopical organisms it soon becomes evident that certain species can only be unequivocally identified by comparing them with other closely related species from other habitats. Therefore the online catalog now covers species collected and studied from other locations, first within Germany. One emphasis is now on rotifers. So discoveries from locations of adjoining European countries are included as well. About 300 species of rotifers are documented up to now.

Also the section of the marine species has undergone an update by adding images of species from several diving excursions in tropical sea areas.

Michael Plewka

news & updates
Revision of the genus Synchaeta
Correction of species names; addition of new images, new species added: Synchaeta longipes
Sinantherina socialis
Images of Sinantherina socialis
Habrorocha novemdens
The rotifer Habrotrocha novemdens found in a bavarian forest.
Dorystoma caudata
The rotifer Dorystoma caudata found in a bavarian pond.
Notommata pseudocerberus
Notommata pseudocerberus found in a bavarian pond.
Trichocerca bidens
Trichocerca bidens found in a bavarian pond.
Otostephanos donneri
Otostephanos donneri found in a bavarian pond
Tetraedriella limbata from Bavarian pond
The Xanthophyte Tetraedriella limbata found in the Bergheimer Baggersee, Bavaria
mysterious rotifers
Observing rotifers for more than 15 years sometimes leads to finding some specimens that are not described in the literature (as far as this literature is available through libraries) or sources from the www. Here are some of them.
Cephalodella ventripes
Cephalodella ventripes found in a water reservoir near Wuppertal/ Germany
4 Rotifers from Sweden
Macrotrachela decora, Macrotrachela cf. nana, Habrotrocha lata and Scepanotrocha semitecta from a Sphagnum-sample in Aneboda, Sweden
New images for Notholca squamula and Notommata cyrtopus
Notholca squamula and Notommata cyrtopus have been found in new locations
Philodina acuticornis odiosa
Philodina acuticornis odiosa from Hattingen/ Germany
two rotifers from Mexico
Adineta ?vaga? and Philodina childi found in Bonampak, Mexico
Macrotrachela habita
Macrotrachela habita found in Hattingen, Germany; images of specimen from Italy added.
Sulawesi dive trip
In November 2013 we had a pleasant stay in the Mapia Resort near manado, the Onong Resort in Siladen and the Lembeh Resort located at the famous Lembeh Strait. Not only has the hospitality in all resorts been overwhelming, but also the knowledge and commitment of the dive guides is fabulous. Here are some images:
Proales laticauda
Proales laticauda, an only recently described rotifer found in the Eifel region
Habrotrocha pusilla var. textris
Habrotrocha pusilla var. textris found in the Eifel region
Mniobia incrassata
Mniobia incrassata from Exmoor, GB
Dissotrocha macrostyla var. tuberculata
Dissotrocha macrostyla var. tuberculata: images added from discovery in Hattingen
Mniobia tentans
Mniobia tentans found in the Eifel region
Otostephanos torquatus
Otostephanos torquatus found in two moss samples
Notommata cyrtopus
Notommata cyrtopus found in a Bavarian pond
Otostephanos donneri
images for Otostephanos donneri, found in an Italian lake
Pleuretra humerosa
Pleuretra humerosa found on a mountain in Elba, Tuscany, Italia
Philodina megalotrocha
new images for Philodina megalotracha, found in an Italian lake
Pediastrum integrum
images for Pediastrum integrum
Limnias melicerta
new images for Limnias melicerta
Floscularia melicerta
Lecane ludwigii
on the reproduction of Hydrodictyon reticulatum
Didymodactylos carnosus from Great Britain
Artforms in Nature
Philodina vorax
New images for Brachionus calyciflorus var. anuraeiformis
Lagerheimia longiseta
The bdelloid rotifer Pleuretra lineata has been found in Hattingen
The bdelloid rotifer Macrotrachela aculeata has been found in Hattingen
Polyarthra vulgaris: male specimen
Habrotrocha aspera
Squatinella leydigi- what is the spine good for?
Philodina nemoralis
Uroleptus: optical sections
Euchlanis triquetra: trophi
Habrotrocha crenata
Macrotrachela ehrenbergi