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Eyestalks are a specialized type of tentacle. Tentacles may also have olfactory organs at their ends. [3] Examples of creatures with olfactory tentacles include snails, the trilobite superfamily Asaphida, and the fly family Diopsidae. In slugs and snails, these tentacles will regrow if severely damaged, and in some species, are retractable. [1]
2 - olfactory epithelium 3 - corneal epithelium 4 - corneal endothelium 5 - retina 6 - layer with rod cells 7 - fibrous connective tissue layer 8 - nerve of the eye: Drawing of cross sections of the extracted tentacle (left) and constricted tentacle (right) with and eye of Helix pomatia. 1 - nerve of an eye 2 - 3 - 4 - eye 5 - tentacle ganglion ...
Like other mollusks, land snails have a mantle, and they have one or two pairs of tentacles on their head. Their internal anatomy includes a radula and a primitive brain. In terms of reproduction, many caenogastropod land snails (e.g., diplommatinids ) are dioecious , [ 7 ] [ 8 ] but pulmonate land snails are hermaphrodites (they have a full ...
In life, it looks almost like a palm frond. In preservation, it looks like a stick covered with sea anemone-like growths. ... Each polyp has eight tentacles, the study’s lead co-author Yuka ...
Cuttlefish with two tentacles and eight arms. In zoology, a tentacle is a flexible, mobile, and elongated organ present in some species of animals, most of them invertebrates. In animal anatomy, tentacles usually occur in one or more pairs. Anatomically, the tentacles of animals work mainly like muscular hydrostats. Most forms of tentacles are ...
The new species of jellyfish is considered “relatively large,” its body reaching just over 1 inch in height and its tentacles measuring over 2 inches in length, the study said.
In terrestrial gastropods (land snails and slugs), the olfactory organs, located on the tips of the four tentacles, are the most important sensory organ. [23] The chemosensory organs of opisthobranch marine gastropods are called rhinophores. The majority of gastropods have simple visual organs, eye spots either at the tip or base of the
Phyllodesmium poindimiei is shown to have translucent pink cerata lining the aboral surface and two pairs of olfactory tentacles with an eye at each base. This monophyletic clade of mollusks were prosobranchs that eventually rid themselves of an exoskeleton. [7] [8] Elongated metazoans will lengthen themselves out to about 50 mm at longest. [9]