Panisaspis sp. 3

Neo, Usa & Adrain, Jonathan M., 2011, 2969, Zootaxa 2969, pp. 1-68 : 24

Panisaspis sp. 3

Fig. 36.3, 36.6, 36.9

Material. Assigned specimen SUI 125836, from Section H 172.5 T m, Fillmore Formation (Tulean; Psalikilus pikum Zone ), southern Confusion Range, Ibex area, Millard County, western Utah, USA.

Discussion. A single cranidium from Section H 172.5T m clearly belongs to a new species of Panisaspis which lacks sufficient material for naming. It differs from the cranidia of all other member of the genus, including the co-occurring species P. rancherensis and P. sevierensis , most obviously in its much sparser and coarser tuberculate sculpture. It also possesses a narrower, more elongate and more anteriorly tapered glabella (especially compared to P. rancherensis ); a slightly more inflated glabella; and a narrower anterior border than both co-occurring species. Both its fixigenae and genal spines are shorter and narrower than those of P. sevierensis . Panisaspis sp. 3 most closely resembles the older Panisaspis sp. 1 from Section H 127.1 m. The cranidia are similar in the size and shape of the glabella and fixigenae, and they are both coarsely tuberculate. However, Panisaspis sp. 3 possesses much sparser and slightly coarser sculpture; the glabella is narrower relative to total cranidial width; the frontal lobe of the glabella is more semicircular due to only slightly inclined S3; S1 is smaller relative to the other glabellar lobes; the palpebral lobe is located further forward; the interocular fixigena is wider; LO is shorter and more posteriorly rounded; and the genal angle is narrower.