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Some writers believe that onycha was Unguis odoratus, the fingernail-like operculum, or trap door, of certain sea snails, such as Strombus lentiginosus, Murex anguliferus, and Onyx marinus. It may be the operculum of a snail-like mollusk found in the Red Sea. [4] This operculum is the trap door of a shell, called by the Latins Conchylium.
Shell of marine snail Lunella torquata with the calcareous operculum in place Gastropod shell of the freshwater snail Viviparus contectus with corneous operculum in place. An operculum (Latin for 'cover, covering'; pl. opercula or operculums) is a corneous or calcareous anatomical structure like a trapdoor that exists in many (but not all) groups of sea snails and freshwater snails, and also ...
Operculum from sea snails. Indeed, the ancients knew this "fingernail" spice (Gr. onycha) to be the fragrant operculum of certain mollusks (marine gastropods), which had the appearance of a claw. [73] The same object had the function in life of closing the aperture of the mollusk's shell.
Operculum (lid) "Finger" that turns inside out / / / Barbs Venom Victim's skin Victim's tissues. An operculum is an anatomical feature, a stiff structure resembling a lid or a small door that opens and closes, and thus controls contact between the outside world and an internal part of an animal. Examples include:
Produce that is referred to today as onycha is diverse, including labdanum, benzoin, bdellium, operculum, etc. Each of these products are only referred to as onycha simply because of those who believe the product was the original onycha of antiquity. I have taken the liberty to expand the description of onycha.
Onycha, which in Greek means "nail", is variously described as being the operculum from a shell found in the Red Sea (which are said to resemble a fingernail), the exudation from the rock rose bush called labdanum (both petals and markings which are said to resemble a fingernail), Styrax benzoin, bdellium, or even cloves.
Neurons that lie adjacently in the operculum project supranuclear fibers to the cranial nuclei for the voluntary movement of facial, pharyngeal, lingual, and masticatory muscles. Emotional movement of these muscles is controlled by alternative pathways that run from the amygdala and lateral hypothalamus to the brainstem via the medial forebrain ...
The Aciculidae are a family of small land snails that have opercula (an operculum is a little door that closes the shell when the animal retracts into it). In other words, Aciculidae are terrestrial operculate gastropods.