Gar pike

Japanese: 鱗骨魚 - りんこつぎょ(英語表記)gar pike
Gar pike
A general term for freshwater fishes of the Lepisosteidae family of the order Squamata. Also called gar pikes. This type of fish is known as a fossil species from the Tertiary period of the Cenozoic era onwards, but all living species belong to this family, with only four species living in rivers in North and Central America. They are called "living fossils." Their bodies are elongated and covered with diamond-shaped hard scales arranged like tiles, but unlike sturgeons, these scales do not have a dentin-like middle layer (cosmin layer) and have dentate projections on the surface.

Source: Heibonsha World Encyclopedia, 2nd Edition Information

Japanese:
鱗骨目鱗骨魚科Lepisosteidaeの淡水魚の総称。ガーパイクともいう。同類は新生代第三紀以後の化石種として知られているが,現生種としてはすべてこの科に属し,北アメリカおよび中央アメリカの川にすむ4種ほどがあるにすぎない。〈生きている化石〉といわれる。体は延長し,かわら状に並ぶひし形の硬鱗で覆われているが,チョウザメなどと違い,この硬鱗には象牙質様の中層(コズミン層)がなく,表面には歯状突起がある。

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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