後口 あとくち動物 どうぶつじゃなかったです
atokuchidōbutsujanakattadesu

Noun
Desu Copula

The polite, past negative form of 後口動物

1. Wasn't a post-oral animal.; Wasn't a rear-mouthed creature.

Past/Perfective
Negative
Polite
Casual Register