Ceratocyrtis histricosus ( Jørgensen, 1905 ) Petrushevskaya, 1971

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 : 32-33

Ceratocyrtis histricosus ( Jørgensen, 1905) Petrushevskaya, 1971

Plate 10, Figs. 2–3 .

Helotholus histricosa n. sp., Jørgensen, 1905, p. 137, pl. 16, figs. 86–88.

non Helotholus histricosa Jørgensen, Riedel, 1958, pl. 3, fig. 8.

non Helotholus histricosa Jørgensen, Benson, 1966 , pl. 31, figs. 4–8.

Helotholus histricosa Jørgensen, Petrushevskaya, 1967 , pl. 51, fig. 2.

Ceratocyrtis histricosa (Jørgensen) , Petrushevskaya, 1971, pl. 52, figs. 2–4.

Ceratocyrtis histricosa (Jørgensen) forma A, Petrushevskaya, 1971, pl. 29, figs. 3–4; pl. 52, figs. 5–7.

Helotholus histricosa Jørgensen, Tan and Tchang, 1976 , text-fig 53a–c.

Ceratocyrtis histricosus (Jørgensen) [sic], Bjørklund, 1976, pl. 8, figs. 19–24.

Ceratocyrtis histricsus (Jørgensen) [sic], Bjørklund, 1976, pl. 11, figs. 4–5.

non Ceratocyrtis sp. aff. C. histricosus (Jørgensen) [sic], Bjørklund, 1976, pl. 15, figs. 6–8.

non Helotholus histricosa Jørgensen, Casey, 1977 , pl. 6, fig. 1.

non Ceratocyrtis cf. hystricosa (Jørgensen) [sic], Dumitrica, 1978, pl. 6, figs. 9 and 19.

Ceratocyrtis sp. aff. C. histricosus (Jørgensen) , Dzinoridze et al., 1978, pl. 41, fig. 13.

Ceratocyrtis sp. , Dzinoridze et al., 1978, pl. 41, fig. 20.

non Ceratocyrtis histricosa (Jørgensen) , Takahashi and Honjo, 1981, pl. 7, figs. 6–7.

non Helotholus histricosa Jørgensen group, Benson, 1983, pl. 8, figs. 1–3.

? Ceratocyrtis histricosa (Jørgensen) , Nigrini and Lombari, 1984, pl. 15, fig. 6.

Ceratocyrtis histricosus (Jørgensen) , Funakawa, 1994, pl. 7, fig 1a–b.

non Helotholus histricosa Jørgensen, Chen et al., 2017 , pl. 68, figs 12–13.

? Clathromitra sp. 2 , Chen et al., 2017, pl. 68, fig. 4 (non figs. 7–11).

Helotholus histricosa Jørgensen, Trubovitz et al., 2020 , supplementary data 7.

Remarks. Petrushevskaya (1971) transferred this species from Helotholus to Ceratocyrtis , as discussed in the genus discussion above. Since then, not all authors have recognized this name change, some of them retaining Helotholus . Many illustrated specimens of Ceratocyrtis (or Helotholus ) histricosa in previous literature are typical of those observed during this study. However, there have been a number of specimens of Sethoconus tabulatus ( Ehrenberg, 1873b) Haeckel, 1887 , forms similar to Helotholus vema (Hays, 1965) or possibly species of Botryopera , specimens of Antarctissa and Pseudodictyophimus , as well as different Ceratocyrtis taxa that have been misidentified as Ceratocyrtis histricosus (Jørgensen) , indicating multiple contradictory concepts in the literature. Here we follow the species concept and genus transfer of Petrushevskaya (1971).

Range. Late Miocene—Late Pleistocene, EEP ( Table 1 ).

Figures

FIGURE 2. Relative abundance of specimens and taxa belonging to Plagiacanthoidea and Lophophaenidae per sample, from IODP Site U1337 in the EEP over the last ~10 Ma. The relative percentages of total taxa are represented by the blue lines and the red lines represent the percentages of total specimens (triangles = Plagiacanthoidea; circles = Lophophaenidae). The Plagiacanthoidea was among the most abundant and speciose of radiolarian groups encountered in Trubovitz et al. (2020), with at least 10% of the specimens and 20% of the taxonomic richness in every sample. Within the Plagiacanthoidea, lophophaenids consistently made up the majority of specimens (~67%) and taxa (~61%). Data are from Trubovitz et al. (2020).

FIGURE 3. Locality map of IODP Site U1337, where all samples for this study were collected. Map from Google EarthTM.