FIGURE 20 in Neoichnology of the burrowing spiders Gorgyrella inermis (Mygalomorphae: Idiopidae) and Hogna lenta(Araneomorphae: Lycosidae)

FIGURE 20. Cluster analysis of burrows produced by Aphonopelma chalcodes, Gorgyrella inermis, and Hogna lenta. Clusters A, B, and C are maintained, and the burrows G6 and A2 form a new cluster. The larger A. chalcodes burrow, A1, does not fall into a cluster. Formatting is the same as in Figure 16. Clusters indicated by letters in blue circles form only in this analysis. The subvertical ramp (SR) is an architecture unique to A. chalcodes.