| This key is only for bdelloid rotifers where eyespots are visible. There are species of the same genera without eyespots as well!! |
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1. Trophi (jaws) close to mouth opening; can be extruded when the animal is feeding, corona with trochi elevated on pedicels:
................................................................................................................................................Philodinavidae (Abrochtha) |
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..............................................................................................................Abrochtha |
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...............................................................................................Philodinavus aussiensis |
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1* Trophi (jaws) deep in esophagus, not extruded when feeding:
........................................................................................................................................................................................(Philodinida) >>> 2 |
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2. Stomach without visible lumen, stomach content as pills; dental formula > 3/3 |
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one species...................................................................................Habrotrocha collaris |
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2* Stomach with lumen, pedicels of trochi often wide; 4 toes; dental formula < 3/3: (Dissotrocha, Philodina, Embata).............3 |
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3. oviparous..................................................................................................Philodina |
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3*.viviparous (can sometimes be detected by two sets of trophi in one specimen (see arrows); |
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integument and inner organs red; endemic species in Antarctica...........................................................................Philodina gregaria |
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integument sculptured, very long spurs..............................................Dissotrocha |
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integument smooth............................................................................. Embata |
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