Lophophaena sp.

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 : 68

Lophophaena sp. cf. L. witjazii

Plate 25, Figs. 6–8D .

Lophophaena witjazii cf sp 2, Trubovitz et al., 2020, supplementary data 7.

Remarks. This species is similar to Lophophaena witjazii (Pl. 25, Figs. 5A–B ), except that cephalis is more elongated, with a more distinct neck, less robust spines, and better-defined thorax shape. Pores tend to be smaller throughout cephalis and thorax. It differs from Lophophaena arie n. sp. (Pl. 26, Figs. 1A – 6 ,?7A–C) in that it has a crown of spines around the top third of the cephalis. The cephalic spines are smaller than on L. witjazii , but future work may show that this is a subspecies of L. witjazii if intermediate forms are discovered.

Material examined: 8 specimens observed from samples 321-1337A-16H- 6, 121–124cm (Late Miocene), 321-1337A-14H-7, 39–42cm (Late Miocene), 321-1337A-4H- 6, 115–118cm (Early Pleistocene), 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. Late Miocene—Recent EEP ( Table 1 ).

Figures

FIGURE 1. Diagram illustrating the general skeletal morphology of Lophophaenidae, and terminology used in this manuscript. Dashed lines indicate spines that are not visible from the angle shown, as they extend into the skeleton. An example specimen of Lophophaena casperi n. sp. is included for comparison to the diagrams.

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.

FIGURE 8. Internal skeletal structure of Botryopera amabie n. sp.