Proleg

Abdominal legs, feet or anus Abdominalbeine or feet are arranged in pairs, fleshy, stub -shaped and unarticulated extremities in various insect larvae. They are used for locomotion and occur in some larvae of sawflies ( Symphyta ) and flies ( Brachycera ), and particularly with nearly all caterpillars. However, these are not real legs, but only Hautausstülpungen because they are unsegmented. You have to move your own muscles, which is not strongly developed. The abdominal legs of the last abdominal segment are designated because of their function as Nachschieber.

For some, especially discriminatory caterpillars bear the abdominal legs hook rings ( ring feet, Pedes Coronati ), in wild caterpillars these are occupied with Chitinklauen for better hard brackets ( bracket feet, Pedes semicoronati ). They are significantly kuppeliger than the real legs in shape and are usually broadened sucker- like at the end. The animals usually have four pairs of abdominal legs that usually sit at the 6th to the 9th segment, and another pair, the so-called Nachschieber on 13 segment ( abdominal segment 10 ).

Between the first three, occupied with sternum pairs of segments and the first segment with abdominal legs are located in almost all tracked two legless segments. Only the Urmotten ( Micropterigidae ) have on these abdominal feet. Some butterfly families deviate from this build. Clamps ( Geometridae ) missing the first three pairs, in some owls moths ( Noctuidae ) are missing the first or the first two pairs. The screws spinners ( Limacodidae ) along with giant pairs of legs, the chest legs are regressed to tiny stubs. You can, like slugs, only creeping move. When the larvae of sawflies the gap between chest and legs first abdominal leg pair consists of only one segment, thus can be distinguished from species of butterflies.

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