Lophophaena sp. O

Trubovitz, Sarah, Renaudie, Johan, Lazarus, David & Noble, Paula, 2022, Late Neogene Lophophaenidae (Nassellaria, Radiolaria) from the eastern equatorial Pacific, Zootaxa 5160 (1), pp. 1-158 : 72-73

Lophophaena sp. O

Plate 27, Figs. 6A – 7B .

Lophophaena witjazii cf sp 1, Trubovitz et al., 2020, supplementary data 7.

Remarks. This species has a crown of bladed spines in the upper third of the cephalis, which is very elongated. It differs from L. witjazii (Pl. 25, Figs. 5A–B ) in that its cephalis is more elongated and does not flare outward at the top, instead forming a cylinder shape. As only four specimens were observed, the range of morphology is not well understood.

Material examined. 4 specimens observed from samples 321-1337A-12H-5, 23–26cm (Late Miocene), 321- 1337A-3H- 2, 103–106cm (Middle Pleistocene), 321-1337A-2H-3, 76–79cm (Late Pleistocene), and 321-1337D-1H-1, 0–3cm (Recent).

Range. Latest Miocene—Recent, EEP ( Table 1 ).

Figures

FIGURE 5. Internal skeletal structure of Amphiplecta acrostoma Haeckel, 1887.

FIGURE 6. Internal skeletal structure of Arachnocorallium calvata (Haeckel, 1887) Petrushevskaya, 1971.

FIGURE 7. Internal skeletal structure of Arachnocorys umbellifera (Haeckel, 1862) Petrushevskaya, 1971.