Fig. 1

The geophilomorph centipede Haplophilus subterraneus. a Male specimen with focus on head and posterior trunk. Note the morphological disparity of locomotory and ultimate legs. b Female posterior trunk with ultimate legs, view from ventral (locomotory legs partially omitted). c Male posterior trunk with ultimate legs, view from ventral (locomotory legs partially omitted). Abbreviations: an antennae, cxp coxal pores, ul ultimate legs