Oxyallagma genus

The only species known so far in this genus is Oxyallagma dissidens (Selys, 1876) from Ecuador and Peru. The presence of Oxyallagma in Colombia was previously mentioned by Bota - Sierra & Wolf (2013); however, they only mentioned an undescribed species sympatric with M. gaudiimontanum . Here I present a key to distinguish the two species that inhabit the Colombian Andes.