Hans Bluntschli (February 19, 1877 – July 13, 1962) was a Swiss anatomist.

Keller had studied in Jena and was a big fan of Ernst Haeckel's (1834-1919) zoological and embryological theories.

[1] He received his medical degree from Heidelberg University in 1903, and taught at multiple universities before becoming the chair of anatomy and embryology in Bern in 1933, where he succeeded Karl Wilhelm Zimmermann, and where he remained until his retirement in 1942.

[2] His contributions were concentrated on comparative anatomy, morphology and embryology, relating his findings to theories about the process of evolution.

[3] His expeditions included the Amazon Rain Forest from 1912 to 1913, and Madagascar from 1932 to 1933, during which he recovered the specimens now know to be white-throated oxylabes.