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The eye is 27 cm (10 + 1 ⁄ 2 in) wide, with a lens 12 cm (4 + 1 ⁄ 2 in) across. This is the largest eye of any known animal. [30] These measurements are of the partly collapsed specimen; alive, the eye was probably 30 [31] to 40 cm (12 to 16 in) across. [57] Inspection of the specimen with an endoscope revealed ovaries containing thousands ...
Consequently, many molluscs may have a multitude of eyes in more unlikely places, such as along the edge of their shell. [1] Chitons have a dispersed network of tiny eyes over the surface of their shells which may act together as a compound eye. [1] Many gastropods have stalked eyes; the eye can be retracted into the stalk itself in the ...
Ophthalmosaurus (Greek ὀφθάλμος ophthalmos 'eye' and σαῦρος sauros 'lizard') is a genus of ichthyosaur known from the Middle-Late Jurassic. Possible remains from the earliest Cretaceous, around 145 million years ago, are also known. It was a relatively medium-sized ichthyosaur, measuring 4 m (13 ft) long and weighing 940 kg ...
They added that a 55-foot (17 m) specimen, such as the one reported from Thimble Tickle, [nb 9] "would have weighed 29 1 ⁄ 4 or 30 tons [26.5 or 27.2 tonnes] including the tentacles—a truly noble animal, being a little more than one-fifth the weight of the largest whale and larger than the whale sharks and basking sharks, the largest of all ...
The bivalves have only three pairs of ganglia—cerebral, pedal, and visceral—with the visceral as the largest and most important of the three functioning as the principal center of "thinking". [ 38 ] [ 39 ] Some such as the scallops have eyes around the edges of their shells which connect to a pair of looped nerves and which provide the ...
It has forward-facing eyes, a small nose, rounded non-lobed ears and a long mobile upper lip. Additionally, adult males have sharp canine teeth. Like all great apes, it has a dental formula of 2.1.2.3 2.1.2.3 , that is, two incisors , one canine , two premolars , and three molars on both halves of each jaw.
Nocturnal animals (for example, tarsiers) and animals that live in open landscapes have larger eyes. The vision of forest animals is not so sharp, and in burrowing underground species (moles, gophers, zokors), eyes are reduced to a greater extent, in some cases (marsupial moles, mole rats, blind mole), they are even covered by a skin membrane.
It has long been believed that nautiluses rise at night to feed, mate, and lay eggs, but it appears that, in at least some populations, the vertical movement patterns of these animals are far more complex. [39] The greatest depth at which a nautilus has been sighted is 703 m (2,306 ft) (N. pompilius). [39]