Pelagomanes stigi ( Bjørklund, 1976 ) Trubovitz, Sarah, Renaudie, Johan, Lazarus, David & Noble, Paula, 2022

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 : 82

Pelagomanes stigi ( Bjørklund, 1976) n. comb.

Plate 39, Figs. 7–9 .

Lithomelissa sp. , Chen, 1975, pl. 11, fig. 4 (non fig. 3).

Lithomelissa stigi n. sp., Bjørklund, 1976, partim. pl. 15, fig. 15A–B (non figs. 12–14, 16–17).

non Ceratocyrtis stigi (Bjørklund) , Nigrini and Lombari, 1984, pl. 15, fig. 7.

? Ceratocyrtis stigi (Bjørklund) Nigrini and Lombari, Abelmann, 1990 , pl. 4, fig. 12.

Lithomelissa cf. stigi, Vigour and Lazarus, 2002 , pl. 3, figs. 11–13 (?fig. 10; non figs. 8–9).

non Lithomelissa stigi?, Vigour and Lazarus, 2002 , pl. 3, fig. 14.

Lithomelissa ? stigi Bjørklund, Renaudie, 2014 , pl. 22, fig. 1.

Remarks. Some of the specimens figured in Bjørklund (1976) were transferred to Ceratocyrtis panicula by Petrushevskaya and Kozlova (1979). These include the specimens on Bjørklund (1976) ’s pl. 15, figs. 12–14, and 17. In addition to these transferred specimens, we do not consider the specimen in fig. 16 to be conspecific with what we consider Pelagomanes stigi on Bjørklund (1976) ’s pl. 15, fig. 15A–B (fig. 15 was designated as the holotype by Bjørklund 1976). Nigrini and Lombari (1984) transferred Lithomelissa stigi (Bjørklund) to Ceratocyrtis , and noted that they considered all specimens illustrated by Bjørklund (1976) to be conspecific. We agree that the specimen figured by Nigrini and Lombari (1984) belongs in Ceratocyrtis , but in our opinion it differs from Lithomelissa stigi Bjørklund (1976) pl. 15, figs. 15A–B. The concept of Pelagomanes (Lithomelissa) stigi has been inconsistently used in the literature, likely due in part to the morphological variation (and possibly different genera) included in the original species description and illustrations. Although no specimens of this species were observed in the EEP, we include illustrations of specimens from the Southern Ocean, sites 1138A (fig. 7), 751A (fig. 8), and 747A (fig. 9) to help clarify our concept. Pelagomanes stigi (Bjørklund) is identifiable for having relatively large pores on the cephalis, an apical horn that is thick at the base and curves upward in a hooklike fashion, and the absence of strong ribs and feet on the thorax.

Figures

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

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

FIGURE 9. Internal skeletal structure of Ceratocyrtis sp. C.