Eosalpingogaster has been considered as a subgenus of Salpingogaster since Hull (1949b) proposed it for Baccha conopida Philippi, including nepenthe Hull and dactylopianus Blanchard. In the original text, Hull wrote "Corners of first abdominal segment with a sharp hook" but one of the differences with Salpingogaster s.str. is that Eosalpingogaster has 1st tergum not produced into a spur. There are evidences to consider Eosalpingogaster a different and valid genus.
Baccha nepenthe Hull, 1943: 40.