Belosaepiidae

Belosaepiidae is an extinct family of cephalopods known from the Eocene epoch, and bearing close similarity to the sepiid cuttlefish, whilst retaining the remnants of a belemnite-like guard.

Ecology

A faunal collection has been found that contains species of both the egnera Belosaepiidae and Sepiidae, suggesting that they are likely to have originated from a seagrass environment in the past. As there was a lack of seagrass in the North Atlantic during the late Eocene period, at least one belosaepiid species went extinct during this time.