Funeralaspis n. gen.: a new odontopleurine trilobite from the early Middle Ordovician (Dapingian) of Death Valley, eastern California, USA, and the classification of Ordovician odontopleurines Author Adrain, Jonathan M. 0000-0002-7000-1311 Department of Earth and Environmental Sciences, 115 Trowbridge Hall, University of Iowa, Iowa City, Iowa 52242, USA; jonathan-adrain @ uiowa. edu; https: // orcid. org / 0000 - 0002 - 7000 - 1311; jonathan-adrain@uiowa.edu Author Pérez-Peris, Francesc 0000-0002-7000-1311 Department of Earth and Environmental Sciences, 115 Trowbridge Hall, University of Iowa, Iowa City, Iowa 52242, USA; jonathan-adrain @ uiowa. edu; https: // orcid. org / 0000 - 0002 - 7000 - 1311; jonathan-adrain@uiowa.edu text Zootaxa 2023 2023-08-24 5336 4 509 529 http://dx.doi.org/10.11646/zootaxa.5336.4.3 journal article 264138 10.11646/zootaxa.5336.4.3 2951673e-1983-40f5-99f3-6af0d0ae808a 1175-5326 8282001 76C30673-75C6-4440-B8BC-C90FCE9CF8A8 Subfamily Acidaspidinae Salter, 1864 indeterminate?acidaspidine pygidium Figure 6.34, 6.35, 6.39, 6.40 Material. Assigned specimen SUI 148699. Discussion. A single pygidium clearly differs from those of the co-occurring F. deathvalleyensis in the possession of more slender, less curved, spines, only a single spine pair abaxial to the major pair, major spines that run in a much more posterodorsal direction, elevated strongly from the plane of the lower pygidial margin in lateral view, and with a sculpture of thornlike spines, and interior spines that are almost exactly parallel to each other versus slightly radially splayed. No other pygidia of this type were found, nor any other sclerite types that could be associated with it.