Small millipede

Japanese: ヒメヤスデ

A general term for arthropods belonging to the order Juliformia of the class Diplopoda. They are round and string-like with a rounded front of the head, a circular cross-section of the body, and short walking legs, making them well suited to burrowing into the soil. They have more than 30 body segments. There are more than 2,000 species distributed around the world, including the largest millipede species (some exceeding 30 cm in length), but most species found in Japan are 1 to 6 cm in length. They undergo a segmental metamorphosis in which the number of body segments increases with each molt, and they take about three years to mature.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:

倍脚綱ヒメヤスデ目Juliformiaに属する節足動物の総称。全体はまるいひも状で頭部の前面はまるく，胴断面も円形で歩肢が短く，土壌中に潜入するのに適した体形をしている。胴節は30個以上。世界中に2000種以上が分布し，ヤスデ類の中でもっとも大型のフトヤスデ類(体長30cmを超えるものがある)を含むが，日本産の種類は1～6cmのものが大部分である。変態は脱皮ごとに体節数の増える増節変態で，成熟するのに3年ぐらいかかる。

出典　株式会社平凡社世界大百科事典第２版について　情報

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