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Erich Otto Engel (29 September 1866, in Alt-Malisch Frankfurt – 11 February 1944, in Dachau) was a German entomologist, who specialised in Diptera.

He was a graphic artist and administrator of the Diptera collection in Zoologische Staatssammlung München.

• Engel, E. O. (1925) Neue paläarktische Asiliden (Dipt.). Konowia. 4, 189-194.
• Engel, E. O., & Cuthbertson A. (1934) Systematic and biological notes on some Asilidae of Southern Rhodesia with a description of a species new to science. Proceedings of the Rhodesia Scientific Association. 34,
• Engel, E.O. 1930. Asilidae (Part 24), in E. Lindner (ed.) Die Fliegen der Paläarktischen Region, vol. 4. Schweizerbart'sche, Stuttgart. 491 pp.
• Engel, E.O. 1938-1954 Empididae. in Lindner, E. (Ed.). Die Fliegen der Paläarktischen Region, vol.4, 28, 1-400.
• Engel, E. O., & Cuthbertson A. (1939). Systematic and biological notes on some brachycerous Diptera of southern Rhodesia. Journal of the Entomological Society of Southern Africa. 2, 181–185.

• Anonym 1936: [Engel, E. O.] Insektenbörse, Stuttgart 53 (37)
• Horn, W. 1936: [Engel, E. O.] Arb. morph. taxon. Ent. Berlin-Dahlem, Berlin 3 (4) 301*
• Reiss, F. 1992: Die Sektion Diptera der Zoologischen Staatssammlung München. Spixiana Suppl., München 17 : 72-82, 9 Abb. 72-75, Portrait

• DEI Portrait

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