Ceratotrocha cornigera Bryce 1893
Ceratotrocha cornigera: frontal view of the head while whirling. Visible are the two conspicuous lobes.
Ceratotrocha cornigera: dorsal view of the head while whirling.
Ceratotrocha cornigera: ventral view of the head while whirling. Visible are the two conspicuous lobes.
Ceratotrocha cornigera: whirling, lateral view. The head/ corona is characterized by two lobes (the right one is visible in the image, labelled "L") that are orientated downwards while whirling.The arrowhead points to the rostrum.
Ceratotrocha cornigera: whirling, detail of the lobes.
Ceratotrocha cornigera: lateral view of the anterior part of the specimen while creeping. The dorsal antenna is short. In this optical longitudinal transect it becomes apparent that Ceratotrocha has a stomach with lumen and walls (arrowheads), so this genus does not belong to the Habrotrochidae.
Ceratotrocha cornigera: dorsoventral view of a creeping specimen. Heed the conspicuous rostrum lamella which is typical for this species.
 

Ceratotrocha cornigera; left image: creeping,specimen, focus plane is on the conspicuous dichotomous rostral lamella (arrowheads). The arrow points to the (closed) mouth opening. Right image: foot with spurs and toes. Ceratotrocha is one of the rare genera of Bdelloids with animals that have only two toes (arrowheads; the other one is Didymodactylos carnosus).

Ceratotrocha cornigera; trophi with dental formula 2/2
Location: Hohenstein, Witten, Germany,
Habitat: soil / rotten wood
Date: 21.10.2017
Sample provided by courtesy of Thorben Hülsewig, Witten
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