Thanks Laurent! Neal Evenhuis dates the livraison for Arremoninae as September 1841 based on multiple sources. But he states on livraisons without good data, dates given by Sherborn and Palmer should be used.
Agassiz in 1846 changed the spelling of Vieillot's Arremon to Arrhemon, "Scr. Arrhemon". Scr is scriptor the writer, ie Agassiz. This spelling was used by others.
Page 319. Was this a mis-latinization a...
The name originated in 1841 from what publication I am not sure. Louis Aggasiz 1846 says: Arremoninae Lafr. A. 1841. (Arrhemonidae) Nomenclator zoologicus: continens nomina systematica generum ..., Volume 2