Hatschek's pit explained

In the lancelet, Hatschek's pit, not to be confused with Hatschek's nephridium, is a deep ciliated fossa on the dorsal midline of the buccal cavity (the region of the gut behind the mouth).^[1] 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.^[2]

Notes and References

1. Book: Jefferies. R.P.S.. The Ancestry of the Vertebrates. December 1, 1986. Intercept Ltd. London, England.
2. Goodrich . Edwin S. . 1934-01-01 . Memoirs: The Early Development of the Nephridia in Amphioxus: Introduction and Part I, Hatschek's Nephridium . Journal of Cell Science . s2-76 . 303 . 499–510 . 10.1242/jcs.s2-76.303.499 . 1477-9137.