FAUNAL REFERENCES

The following is a list of taxonomic references concerning the 16 species identified. The descriptions of these species are denoted by the original references, and brief remarks are added as necessary. All specimens shown in the figures are deposited at the Institute of Geology and Paleontology, Graduate School of Science, Tohoku University.

Globigerina nepenthes Todd, 1957

(Pl. P1, fig. 1a-c)

Globigerina nepenthes Todd, 1957, p. 301, pl. 78, fig. 7a-c.

 

Globoquadrina dehiscens Chapman, Parr, and Collins, 1934

(Pl. P1, fig. 2a-c)

Globorotalia dehiscens Chapman, Parr, and Collins, 1934, p. 569, pl. 11, fig. 36a-c.

 

Globorotalia ikebei Maiya, Saito, and Sato, 1976

(Pl. P1, fig. 3a-c)

Globorotalia ikebei Maiya, Saito, and Sato, 1976, p. 410, pl. 1, fig. 4a-c.

 

Globorotalia inflata (d'Orbigny), 1839b

(Pl. P1, figs. 4a-c, 5a-c)

Globigerina inflata d'Orbigny, 1839b, p. 134, pl. 12, figs. 7-9.

Remarks: We discriminated G. inflata into two morphological types, the early "transitional" form and the later "modern" form. The "modern" form (Plate P1, fig. 4a-c) differs from the "transitional" form (Plate P1, fig. 5a-c) in having three chambers in its last whorl, in contrast with the four chambers in that of the "transitional" form.

 

Globorotalia lenguaensis Bolli, 1957

(Pl. P1, fig. 6a-c)

Globorotalia lenguaensis Bolli, 1957, p. 120, pl. 29, fig. 5a-c.

 

Globorotalia plesiotumida Blow and Banner, 1965

(Pl. P2, fig. 1a-c)

Globorotalia (Globorotalia) plesiotumida Blow and Banner, 1965, p. 207, fig. 2a-c.

 

Globorotalia puncticulata (Deshayes), 1832

(Pl. P2, fig. 2a-c)

Globigerina puncticulata Deshayes, 1832, p. 170.

Remarks: This species is characterized by its strongly vaulted umbilical side in the axial profile, having four rhomboid chambers in the last whorl, and a high-arched aperture lacking a rim or lip. The present criterion of G. puncticulata includes the morphological type of Globorotalia praeinflata Maiya, Saito, and Sato, 1976.

 

Neogloboquadrina acostaensis (Blow), 1959

(Pl. P2, fig. 3a-c)

Globorotalia acostaensis Blow, 1959, p. 208, pl. 17, fig. 106.

 

Neogloboquadrina asanoi (Maiya, Saito, and Sato), 1976

(Pl. P2, fig. 4a-c)

Globoquadrina asanoi Maiya, Saito, and Sato, 1976, p. 409, pl. 3, figs. 1a-c, 2a-c, 3.

 

Neogloboquadrina pachyderma (Ehrenberg), 1861 (s. lat.)

(Pl. P2, fig. 5a-c)

Aristerospira pachyderma Ehrenberg, 1861, pp. 276, 277, and 303.

Neogloboquadrina pachyderma (Ehrenberg). Saito, Thompson, and Breger, 1981, pp. 106 and 107, pl. 34, fig. 1a-c.

Remarks: This species varies widely in the size and shape of its test. In this study, we treat the present taxa as s. lat., including the morphological type of Neogloboquadrina pseudopachyderma (Cita, Premoli-Silva, and Rossi), 1965.

 

Neogloboquadrina praehumerosa (Natori), 1976

(Pl. P2, fig. 6a-c)

Globorotalia (Turborotalia) humerosa praehumerosa Natori, 1976, p. 227, pl. 2, figs. 1a-c, 3a-c.

 

Orbulina suturalis Brönnimann, 1951

Orbulina suturalis Brönnimann, 1951, p. 135, text figure 2, nos. 1-2, 5-8, 10, text figure 3, nos. 3-8, 11, 13-16, 18, 20-22, text figure 4, nos. 2-4, 7-12, 15-16, 19-22.

 

Orbulina universa d'Orbigny, 1839a

Orbulina universa d'Orbigny, 1839a, p. 2, pl. 1, fig. 1.

 

Sphaeroidinellopsis seminulina (Schwager), 1866

Globigerina seminulina Schwager, 1866, p. 256, pl. 7, fig. 112.

 

Sphaeroidinellopsis subdehiscens (Blow), 1959

Sphaeroidinella dehiscens subdehiscens Blow, 1959, p. 195, pl. 12, figs. 71a-72.