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Dynastes tityus is known by a number of common names, including eastern Hercules beetle, elephant beetle and ox beetle. [1] It was first given a scientific name by Carl Linnaeus, in his 1763 work Centuria Insectorum, where it was called Scarabaeus tityus; when Linnaeus' genus Scarabaeus was divided into smaller genera, S. tityus was renamed Dynastes tityus.
Male Hercules beetles may reach up to 173 mm (7 in) in length (including the horn), making them the longest species of beetle in the world, if jaws and/or horns are included in the measurement. [ 3 ] [ 6 ] The size of the horn is naturally variable, more so than any variation of the size of legs, wings, or overall body size in the species.
Dynastes is a genus of large beetles belonging to the family Scarabaeidae.They occur in the Nearctic realm and in the Neotropical realm, from the United States to Brazil; [1] [2] four North American species (including Mexico), three with distributions extending from Central America either north or south, and two species endemic to South America.
Dynastinae or rhinoceros beetles are a subfamily of the scarab beetle family (Scarabaeidae). Other common names – some for particular groups of rhinoceros beetles – include Hercules beetles, unicorn beetles or horn beetles. Over 1,500 species and 225 genera of rhinoceros beetles are known. [2]
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It is the major component of the floor of the mouth. Typically, together with the maxillae, the labium assists manipulation of food during mastication. Dragonfly nymph feeding on fish that it has caught with its labium and snatched back to the other mouthparts for eating. The labium is just visible from the side, between the front pairs of legs.
Measurements of insect length normally exclude legs, jaws, or horns, but if jaws are included, the longest known specimen of M. cervicornis is 17.7 cm; the longest known specimen of Dynastes hercules, a beetle species with enormous horns, is 17.5 cm, [2] [3] and the longest known beetle excluding either jaws or horns is Titanus giganteus, at 16 ...
The longest beetle is the Hercules beetle Dynastes hercules, with a maximum overall length of at least 16.7 cm (6.6 in) including the very long pronotal horn. The smallest recorded beetle and the smallest free-living insect (as of 2015), is the featherwing beetle Scydosella musawasensis which may measure as little as 325 μm in length.