Ceratocyrtis undefined-i

Ceratocyrtis sp. I group

Plate. 14, Figs. 3A – 6B.

Ceratocyrtis sp 7 cf, Trubovitz et al., 2020, supplementary data 7.

Remarks. This species group is unique for its relatively heavily silicified cephalis, and long, thin thorax with semiirregular pores that remain similar in size throughout the length of the thorax. It differs from C. cucullaris (Pl. 10, Fig. 1) in that the thorax does not flare as widely outward, and it has a relatively thin thorax wall. It differs from C. histricosus (Pl. 10, Figs. 2–3) in that it generally grows a much longer thorax, and the pores on the thorax do not substantially increase in size toward the bottom. We list this as a species group rather than a single species because the simple morphology and lack of constraint in morphological variability make it difficult to determine whether this is one species or multiple.

Material examined. 10 specimens observed from Late Miocene samples 321-1337D-23H- 6, 134–137cm, 321- 1337A-18H-6, 77–80cm, and 321-1337A-16H- 6, 121–124cm.

Range. Late Miocene in the EEP (Table 1).