Friedrich Wilhelm Erdmann Clasen (29 October 1792 , Hagenow

Hagenow

Hagenow is a German town in the southwest of Mecklenburg-Western Pomerania, in the district of Ludwigslust-Parchim, 30 kilometers south of Schwerin...

 – 2 May 1882, Rostok) was a German

Germans

The Germans are a Germanic ethnic group native to Central Europe. The English term Germans has referred to the German-speaking population of the Holy Roman Empire since the Late Middle Ages....

 entomologist who specialized in Coleoptera.

Clasen was a teacher

Teacher

A teacher or schoolteacher is a person who provides education for pupils and students . The role of teacher is often formal and ongoing, carried out at a school or other place of formal education. In many countries, a person who wishes to become a teacher must first obtain specified professional...

 at the state school (Stadtschule) in Rostok.He was the author of Beitrage zur Kaeferfauna Mecklenburg

Mecklenburg

Mecklenburg is a historical region in northern Germany comprising the western and larger part of the federal-state Mecklenburg-Vorpommern...

s Abtlg. Osterprogr. Gr.Stadtschule zu Rostock (1845) and between 1853 and 1861 a number of other scientific paper on the beetles of Mecklenburg
His collection is in the Zoological Institute Museum in Greifswald

Greifswald

Greifswald , officially, the University and Hanseatic City of Greifswald is a town in northeastern Germany. It is situated in the state of Mecklenburg-Vorpommern, at an equal distance of about from Germany's two largest cities, Berlin and Hamburg. The town borders the Baltic Sea, and is crossed...

http://www.mnf.uni-greifswald.de/fr-biologie/zool-institut-museum/zool-museum/wissenschaftliche-sammlung-collections/insekten.html