Due to the apparent rarity of the species no type specimen was collected, instead feathers from the mist net, photographs, recordings and notes were used as the holotype.

In Catalonia, the species is listed as "Endangered" in view of its apparent rarity there.

Currently, little fishing occurs in the region where this shark is found, but should that change it may be vulnerable due to its apparent rarity and benthic habits.

Despite the apparent rarity of these events, observation of the intense maser emission has been suggested as a detection scheme for extrasolar planets.

Currently, the 1980s models are considered collectors items, due to their apparent rarity.

As such, it is considered vulnerable in light of its apparent rarity, as well as its presence in a politically unstable region.

The shell was historically greatly prized for its beauty and apparent rarity.

The apparent rarity of balances in the sixth century emphasises the change that had taken place, especially in Kent.

This apparent rarity meant that shells of this species fetched very high prices, until finally the habitat for this cone was discovered.

Exodus is the first set to make a card's rarity visibly apparent on the card itself.