Gammaridea

Japanese: Gammaridea

…They are classified into four suborders: Gammaridea (shrimps, sandhoppers), Ingolphiellidea (mainly deep-sea), Hyperiidea (jellyfish, fleas), and Caprellidea (caprellidea). [Shigeo Gamou]. …

From [Collembol]

…It is a general term for the crustaceans of the order Amphipoda, suborder Amphipodidae, or a name that represents a specific species of this order. The Amphipods are represented by the Amphipods Gammarus and similar species, which are commonly found in rivers, ponds, and other places. When they come onto land, they move by jumping, so they are also commonly called springtails. …

From 【Yokoebi (side shrimp)】

…The name gammaridea comes from the fact that these animals swim sideways through the water. The body of the gammaridea is flattened from side to side and is divided into a head, seven thoracic segments, six abdominal segments, and a telson segment. The head has a pair of compound eyes on each side. In general, the four pairs of thoracic legs in the front are bent forward, and the three pairs in the back are bent backward like the abdominal legs. …

*Some of the terminology that mentions "Gammaridea" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…次の4亜目に分類されている。ヨコエビ亜目Gammaridea(ヨコエビ，ハマトビムシ)，インゴルフィエラ亜目Ingolphiellidea(おもに深海産)，クラゲノミ亜目Hyperiidea(クラゲノミ，タルマワシ)，ワレカラ亜目Caprellidea(ワレカラ)。【蒲生重男】。…

【トビムシ(跳虫)】より

…端脚目ヨコエビ亜目の甲殻類の総称，あるいはこれに属する特定の種類を代表する呼名としても用いられる。ヨコエビ類Gammarideaは，河川や池沼などにふつうに見られるヨコエビGammarusおよびこれに近似の種類で代表される。これらは陸上に出ると跳躍して運動するので，一般にトビムシとも呼ばれる。…