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
286001
10.11646/zootaxa.5160.1.1
4088bcf7-dfad-49c7-886c-b745e1d2cdfb
11755334
10544058
A9179C79-EE43-44E4-8723-919505500049
Pelagomanes cantharoides
(
Sugiyama and Furutani, 1992
)
n. comb.
Plate 40,
Figs. 1–3
,
7–8
,
10
,
14
.
Ceratocyrtis? cantharoides
n. sp.
,
Sugiyama and Furutani, 1992
, pl. 13, figs. 1–2; pl. 20, figs. 1–2b.
Ceratocyrtis
sp.
aff.
C. cucullaris
(Ehrenberg)
,
Tsoy and Shastina, 1999
, pl. 35, fig. 6.
Ceratocyrtis?
cantharoides
Sugiyama and Furutani,
Renaudie, 2014
, pl. 22, fig. 3.
Ceratocyrtis cantharoides
Sugiyama and Furutani,
Trubovitz
et al.,
2020
, supplementary data 7.
Remarks.
Sugiyama and Furutani (1992)
only tentatively placed this species in
Ceratocyrtis
because it lacks the well-developed, dendritic axobate that is typical of
Ceratocyrtis
species.
The authors state that the apical horn has 1–2 branches on the dorsal side. It is this forked apical horn that separates
P. cantharoides
from similar taxa (i.e.,
P. morawanensis
and
P. tekopua
). However, it is unclear whether this character alone should justify the separation of this species from
P. morawanensis
(Funakawa)
. Plate 40 demonstrates that specimens sharing the character of a forked apical horn often have as many differences between one another as with specimens without a forked horn. This suggests that a forked horn may not be a reliable distinguishing character, and these two species concepts may require revision. Here we provisionally accept these two concepts as separate species, but acknowledge that further study may show they are the same.
Range.
Middle Miocene in the EEP, though the range in our material is not well constrained (
Table 1
).
Sugiyama and Furutani (1992)
described this species from the Middle Miocene of
Japan
.
Renaudie (2014)
reported it from the Early–Middle Miocene of the Southern Ocean.