Head shrimp - Head shrimp

Japanese: カシラエビ - かしらえび
Head shrimp - Head shrimp
A general term for crustaceans belonging to the Cephalocarida subclass. They are the most primitive of all living crustaceans, and are tiny, measuring less than 3 mm in length. In 1926, DJ Scourfield discovered a fossil crustacean measuring about 3 mm in length in the middle or lower Devonian strata of Rhynie, Aberdeenshire, eastern Scotland, that at first glance resembled a modern crustacean, the baleen shrimp (Anostraca). He named it Lepidocaris rhyniensis and announced it as a new family, genus, and species.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
カシラエビ亜綱Cephalocaridaに属する甲殻類の総称。現生甲殻類のうちもっとも原始的な特徴をもち体長3mm以下と微小。1926年,スカウアーフィールドD.J.Scourfieldによって,イギリスのスコットランド東部,アバディーンシャー州のライニーの古生代デボン紀の中部あるいは下部の地層から発見された体長約3mmの化石甲殻類の一種は,現生甲殻類のうちではホウネンエビ類(鰓脚亜綱無甲目)に一見よく似ており,レピドカリス・リニエンシスLepidocaris rhyniensisと命名され,新科,新属,新種として発表された。

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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