竜骨 りゅうこつ突起 とっきではありませんでした
ryūkotsutokkidewārimasendeshita

Noun
Desu Copula

The polite, past negative form of 竜骨突起

1. Was not a keel spur.; Was not a dorsal spine.

Past/Perfective
Negative
Polite
Formal Register