Neogloboquadrina pseudopachyderma (Cita, Premoli-Silva, and Rossi)
publication ID |
https://doi.org/ 10.26879/444 |
persistent identifier |
https://treatment.plazi.org/id/A029445F-E915-FFB0-4BCA-BE2476F6A1CB |
treatment provided by |
Felipe |
scientific name |
Neogloboquadrina pseudopachyderma (Cita, Premoli-Silva, and Rossi) |
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Neogloboquadrina pseudopachyderma (Cita, Premoli-Silva, and Rossi) View in CoL
Figures 17.15-17.17 View FIGURE 17
1965 Globorotalia pseudopachyderma Cita, Premoli-Silva, and Rossi , p. 233, pl. 20, figs. 3, 4, 6, pl. 31, fig. 6, p. 235, text-fig. 5.
1974 Globigerina pseudopachyderma Cita, Premoli-Silva, and Rossi — Olsson, pl. 2, figs. A—J.
1975 Neogloboquadrina atlantica (Berggren) — Poore and Berggren, pl. 1, fig. 8—13, pl. 2, fig. 7.
1985 Neogloboquadrina pachyderma (Ehrenberg) — Ibaraki, p. 138, pl. 13, figs. 3, 4.
2000 Neogloboquadrina inglei Kucera and Kennett , p. 80, pl. 1, figs. 1—13.
2003 Neogloboquadrina incompta (Cifelli) View in CoL — Ujiié, p. 41, pl. 1, fig. 2 (non Globigerina incompta Cifelli, 1961 ).
2004 Neogloboquadrina incompta (Cifelli) View in CoL — Hanagata, pl. 2, figs. 1, 2.
Remarks. Almost all specimens from the Pliocene of Miyakojima Island exhibit dextral coiling except for a single specimen from sample 2-2 of the Minebari Formation which is sinistral.
There have been extensive taxonomic studies of the morphological variations of N. pachyderma and related species, including N. borealis [= Globigerina bulloides d’Orbigny var. borealis Brady,
1881, first referred to as Globigerina bulloides arctic variety by Brady, 1878, p. 435, pl. 21, fig. 10; also reprinted as N. pachyderma by Jones, 1994, p. 113, pl. 114, figs. 19, 20], N. pseudopachyderma , N. incompta , N. atlantica [= Globigerina atlantica Berggren, 1972 , pp. 972, 973, pl. 1, fig. 1—7; Poore and Berggren, 1975], and N. inglei . In addition, attempts have been made to distinguish morphotypes based on wall calcification/encrustation, chamber inflation, lobulation, or test size (e.g., Kennett, 1968; Bandy, 1972; Srinivasan and Kennett, 1974; Reynolds and Thunell, 1986; Bergami et al., 2009; Eynaud et al., 2009). However, the relationship among these species is still confused. For example, it is speculated that Poore and Berggren (1975) included N. pseudopachyderma and N. incompta , and also Neogloboquadrina praehumerosa (as here understood) in their N. atlantica , as judged from their illustrations.
Among those studies, Keller (1978b) regarded incompta and puseudopachyderma as morphotypes of N. pachyderma , focusing on test size assuming the differences in test shape mirrored growing stages. Her work should be valued for treating incompta and pseudopachyderma in the discussion; later work did not even mention those species.
Recent molecular study, based on r-DNA, is expected to resolve this problem (e.g., Darling et al., 2006, 2007). So far, DNA extraction and morphological classification have not been properly combined in previous studies.
Occurrence. Dextral specimens are common in the Onogoshi and Minebari formations. A single sinistral specimen is available from the Minebari Formation.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Neogloboquadrina pseudopachyderma (Cita, Premoli-Silva, and Rossi)
Hanagata, S & Nobuhara, T 2015 |
Globigerina incompta
Cifelli 1961 |