Hamulinidae is an extinct ammonoid cephalopod family belonging to the order Ammonitida.

[1] These cephalopod were fast-moving nektonic carnivores.

They lived during the Lower Cretaceous period (Lower Barremian - Upper Barremian).

The long main shaft is followed by a hook and a shorter, close, parallel or slightly divergent final shaft.

The ammonitic suture is with a subtrifid L. The U is usually reduced or indifferentiated in adults.