Succinapis, ENGEL, 2001

ENGEL, MICHAEL S., 2001, A Monograph Of The Baltic Amber Bees And Evolution Of The Apoidea (Hymenoptera), Bulletin of the American Museum of Natural History 2001 (259), pp. 1-1 : 1-

Key to Species of SUCCINAPIS

1. Clypeal protrusion extending above level of antennal sockets by an antennal socket diameter or less (figs. 86–88, 93–95).... 2

– Clypeal protrusion extending dorsally above level of antennal sockets by more than the diameter of an antennal socket (figs. 96– 98)............ S. proboscidea , n. sp.

2. Clypeal protrusion straight, apex not bent anteriorly, apex with short setae (figs. 86–88); mesepisternum smooth................................... S. goeleti , n. sp.

– Clypeal protrusion bent anteriorly at apex, apex with long setae (figs. 93–95); mesepisternum punctured.................................. S. micheneri , n. sp.