Acidaspidinae Salter, 1864

Adrain, Jonathan M. & Pérez-Peris, Francesc, 2023, 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, Zootaxa 5336 (4), pp. 509-529 : 526

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.

Figures

FIGURE 6. 1–33, 36–38, 41, 42. Funeralaspis deathvalleyensis n. gen. n. sp., from the Antelope Valley Formation (Dapingian), west flank of Funeral Mountains, Death Valley National Park, Inyo County, eastern California, USA. 1, 6–8, 14. Pygidium, SUI 148688, dorsal, posterior, anterior, ventral, and left lateral views, x15. 2–4. Pygidium, SUI 148689, dorsal, right lateral, and posterior views, x15. 5, 10, 12, 15, 18. Pygidium, SUI 148690, dorsal, right lateral, ventral, posterior, and anterior views, x15. 9, 13, 17. Pygidium, SUI 148691, dorsal, posterior, and left lateral views, x17. 11, 21, 22. Pygidium, SUI 148692, left lateral, posterior, and dorsal views, x20. 16, 19, 20. Pygidium, SUI 148693, dorsal, posterior, and right lateral views, x17. 23, 26, 30. Pygidium, SUI 148694, right lateral, dorsal, and posterior views, x25. 24, 27, 31. Pygidium, SUI 148695, dorsal, posterior, and right lateral views, x25. 25, 28, 29, 33. Pygidium and thoracic segments, SUI 148696, dorsal, right lateral, posterior, and ventral views, x15. 32, 36, 37. Pygidium, SUI 148697, dorsal, left lateral, and posterior views, x15. 38, 41, 42. Pygidium, SUI 148698, dorsal, left lateral, and posterior views, x15. 34, 35, 39, 40.?acidaspidine pygidium, SUI 148699, dorsal, ventral, posterior, and right lateral views, x15.