Fig. 7From: Hyolithid-like hyoliths without helens from the early Cambrian of South China, and their implications for the evolution of hyolithsPhylogenetic position and temporal distribution of 25 genera of hyoliths during the Cambrian to Ordovician. The strict consensus of six most parsimonious tress (MPTs) generated from PAUP* version 4.0b10 [34], plotted on stratigraphy (see Additional file 1, for ages justification) (CI = 0. 490; RI = 0.695; RC = 0.340; HI = 0.510). Dark grey box with red outline shows the known distribution of hyoliths in the Cambrian and OrdovicianBack to article page