Fig. 4 in Composite Phymatoderma from Neogene deep-marine deposits in Japan: Implications for Phanerozoic benthic interactions between burrows and the trace-makers of Chondrites and Phycosiphon

Fig. 4. Schematic diagram showing the measured parameters. DCh, burrow diameter of Chondrites; DPc, burrow (i.e., central core) diameter of Phycosiphon; DPm, burrow diameter of Phymatoderma; PWmax, maximum pellet width; X and Y are the numbers of measured specimens, X ranges from 4–10, Y from 2–37.