Late Neogene Lophophaenidae (Nassellaria, Radiolaria) from the eastern equatorial Pacific Author Trubovitz, Sarah Author Renaudie, Johan Author Lazarus, David Author Noble, Paula text Zootaxa 2022 2022-07-04 5160 1 1 158 http://dx.doi.org/10.11646/zootaxa.5160.1.1 journal article 10.11646/zootaxa.5160.1.1 1175­5334 10544058 A9179C79-EE43-44E4-8723-919505500049 Amphiplecta cylindrocephala ? Dumitrica, 1973 Plate 1, Figs. 3A – 4C . ? Amphiplecta cylindrocephala n. sp. , Dumitrica, 1973, p. 836, pl. 24, figs. 4–5. non Amphiplecta cylindrocephala Dumitrica, Benson, 1983 , pl. 8, fig. 5. Remarks. This species is very close to Amphiplecta acrostoma Haeckel, 1887 , but according to Dumitrica (1973), it differs in that it has a “very long cephalis, less spiny shell, and non-denticulate spines.” This species is rare, and only two Quaternary specimens were illustrated by Dumitrica (1973), so it is difficult to know the true variability of this species. In our material we encountered two specimens with an unusually long cephalis, suggestive of Amphiplecta cylindrocephala Dumitrica , but one specimen differed in that it had a slight pinch in the cephalis outline toward the top. Thus, we questionably place these specimens in Amphiplecta cylindrocephala Dumitrica. Other than the two illustrations by Dumitrica (1973), we are only aware of one other illustration of Amphiplecta cylindrocephala by Benson (1983) . This specimen appears to be within the range of Amphiplecta acrostoma Haeckel , so we do not consider it to be synonymous with our Amphiplecta cylindrocephala ? specimens. Range. Early Pliocene in the EEP ( Table 1 ).