Tertiapatus
Tertiapatus is an extinct genus of supposed onychophoran known from Dominican amber deposits. The only known species described is Tertiapatus dominicanus. Other authors have doubted its status as an onchyophoran, due to its arthropodized antennae and articulated exoskeleton, which suggests that it is likely an arthropod. References

Prehistoric onychophorans
Onychophorans of tropical America
Onychophoran genera
Monotypic protostome genera
Prehistoric protostome genera
Taxa named by George Poinar Jr.