Pseudoolenoides dilectus Zone

Adrain, Jonathan M. & Karim, Talia S., 2012, 3467, Zootaxa 3467, pp. 1-97 : 7

Pseudoolenoides dilectus Zone

This zone is as outlined by Hintze (1953, pp. 20–21). Pseudoolenoides dilectus is perhaps not the best choice as name bearer, as it is very rare (we did not encounter it in our sampling), whereas the cooccurring P. ludificatus is one of the most common trilobites in collections from the zone. Nevertheless, the original name is retained for clarity's sake, although none of the names have been referred to often in the literature. In addition to the faunal list given by Hintze (1953, table 11), we here describe an additional species of Pseudoolenoides , P. pogonipensis , from the zone. Adrain and McAdams (2012) also demonstrated that Psephosthenaspis glabrior extends upward into the zone from the underlying zone which bears its name.

The zone is mainly represented by one prolific bed 1.5 m above the base of the Kanosh Formation. This is locality K-1 of Hintze (1953, table 11) at section K-South. The bed is not found in outcrop, but is represented by small lumps of limestone densely scattered and weathering in place along strike (now mostly collected). The same interval at Section J has not yielded abundant silicified fossils, but did yield Hintze's (1953) articulated holotype of P. dilectus .