Haustellum brandaris, also known as Bolinus brandaris or Murex brandaris, and commonly known as the purple dye murex or the spiny dye-murex is a species of medium-sized predatory sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or the rock snails.
This species, like many other species in the family Muricidae, can produce a secretion which is milky and without color when fresh but which turns into a powerful and lasting dye when exposed to the air.
This was the mollusk species used by the ancients to produce Tyrian purple fabric dye.
The adult shell size of this species is about 60 to 90 mm.
A New Genus and Species of Urodidae (Lepidoptera: Urodoidea) from Argentina with the First Report of Asymmetric Male Genitalia in the Superfamily
Jun 01, 2013; Urodidae, the sole family of the superfamily Urodoidea, belongs to the apoditrysian Lepidoptera. The group currently includes 66...