Scalidophora is an extant cycloneuralian benthic marine clade containing Priapulida, Kinorhyncha and Loricifera. Currently, they are a relatively small group, containing slightly over 400 described extant species. Scalidophorans exhibit an extremely lopsided fossil record: while abundantly represented in the early and mid-Cambrian, their post-Cambrian record is almost exclusively limited to palaeoscolecid body – and microfossils. Among Scalidophora, the Selkirkiidae are of particular interest, because they are the only members of this clade to have developed a tubicolous lifestyle within a rigid, heavily sclerotized tube. Until the recent description of a species from the Early Ordovician Fezouata Biota, selkirkiids were exclusively known from the early and mid-Cambrian and are classically regarded as typical examples of Cambrian ‘Burgess Shale-type’ organisms. Here we report the occurrence of a selkirkiid in a recently discovered exceptionally preserved fauna from the Lower Devonian (upper Pragian) Martelange Member of the La Roche Formation at Warmifontaine, southern Belgium. These new finds add to the extremely scarce post-Cambrian scalidophoran fossil record and extend the range of Selkirkiidae by 70 Ma, giving the group a longevity of at least 110 Ma. The Belgian selkirkiids join a long list of supposedly ‘Cambrian Burgess Shale-type’ taxa that over the years have been shown to extend well past the mid-Cambrian, into the later Palaeozoic. This discovery therefore not only underscores the by now well-established persistence and ecological success of many supposedly ‘Cambrian’ taxa but also calls into question the value of the semantically problematic concept of uniquely Cambrian ‘Burgess Shale-type’ organisms.