Acanthotretella
Acanthotretella is a genus of brachiopods known from the Burgess Shale and the Guanshan fauna.
Their spines are proposed to be homologous with those of the Siphonotretids.
Acanthotretella is a genus of brachiopods known from the Burgess Shale and the Guanshan fauna.
Their spines are proposed to be homologous with those of the Siphonotretids.