In the
lancelet, Hatschek's pit, not to be confused with Hatschek's nephridium, is a deep
ciliated fossa
Fossa may refer to:
Animals
* Fossa (animal), the common name of a carnivoran mammal of genus ''Cryptoprocta'' endemic to Madagascar
* ''Fossa'', the Latin genus name of the Malagasy civet, a related but smaller mammal endemic to Madagascar
Pla ...
on the
dorsal midline of the
buccal cavity (the region of the gut behind the mouth). Among other things, it secretes
mucus which entraps food particles from the water. It is named after
Berthold Hatschek, an Austrian zoologist who worked on the lancelet.
References
Chordate anatomy
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