Erjiecaris Is an extinct genus of bivalved Cambrian arthropod, known from the Chengjiang Biota of Yunnan, China.

Around 1 centimetre (0.39 in) long, It has an unusual flattened head-shield, with an elongate body with at least 19 segments and a forked tail similar to Waptia.

Unlike most bivalved arthropods, its simple, unstalked eyes are placed on top of the headshield.

The relationship of Erjiecaris to other arthropods was considered uncertain in its original description.

[2] Despite the head shield being portrayed as flattened in most specimens, this is likely a preservational artifact from the valves being “butterflied” out, and Erjiecaris likely looked more similar to other hymenocarines.