Its age is Sinian early Paleozoic to Devonian.

其时代主要为震旦纪—早古生代至泥盆纪。

youdao

The geochronologic unit is belonged to Early Age of Middle Devonian Epoch, and correspond to Eifelicus Stage-Jiweite Stage, and is belonged to Daminshan Formation of Devonian system.

时代属于中泥盆世早期，大体相当于艾菲尔阶-吉维特阶，应归属为大民山组。

youdao

It was a relic of the Devonian age, one-and-a-half million years ago.

ECONOMIST: The Creature from the Black Lagoon