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The largest is the dobsonfly Acanthacorydalis fruhstorferi, which can have a wingspan of up to 21.6 cm (8.5 in), making it the largest aquatic insect in the world by this measurement. [38] This species is native to China and Vietnam, and its body can be up to 10.5 cm (4.1 in) long. [39]
Stylus comes from the Latin stilus —the spelling stylus arose from an erroneous connection with Greek stylos (στύλος), 'pillar'. [3] The Latin word had several meanings, including "a long, sharply pointed piece of metal; the stem of a plant; a pointed instrument for incising letters; the stylus (as used in literary composition), 'pen ...
Cerci (sg.: cercus) are paired appendages usually on the rear-most segments of many arthropods, including insects and symphylans. Many forms of cerci serve as sensory organs, but some serve as pinching weapons or as organs of copulation. [1] In many insects, they simply may be functionless vestigial structures.
Archaeognatha are small insects with elongated bodies and backs that are arched, especially over the thorax. Their abdomen ends in three long tail-like structures, of which the lateral two are cerci, while the medial filament, which is longest, is an epiproct. The tenth abdominal segment is reduced. [8] The antennae are flexible.
The first three abdominal segments bear short limb-like appendages, [10] called "styli". [12] The first pair of styli is two-segmented, while the second and third pair are either two-segmented or unsegmented. [5] The genitalia are internal and the genital opening lies between the eleventh segment and the telson of the adult. [10]
Ctenomorpha gargantua, the gargantuan stick insect, is a species of stick insect that is endemic to rainforests in northeastern Queensland, Australia. [2] It is Australia's longest stick insect and among the world's longest stick insects, with females having been confirmed at up to 56.5 cm (22.2 in) in total length, including extended legs and cerci (protrusions from the end of their body ...
[4] [5] The second-largest member of the genus likely is Phryganistria heusii yentuensis, with a total length of up to 52 centimetres (20 in) and a body length up to 32 centimetres (13 in). [ 2 ] [ 6 ] Another, Phryganistria tamdaoensis was selected in 2015 by the International Institute for Species Exploration as one of the "Top 10 New Species ...
Blaberus giganteus is considered one of the largest cockroaches in the world, with males reaching lengths of up to 7.5 cm (3.0 in) and females 10 cm (3.9 in), [2] although others list 9 cm (3.5 in) as the maximum length. [3] These cockroaches are lightly built with flattened bodies, allowing them to hide in cracks from predators.