Bairdoppilata conformis ( Terquem, 1878 )

Sciuto, F & Rosso, M, 2015, Bathyal ostracods from the Santa Maria di Leuca deep-water coral province (northern Ionian Sea), Palaeontologia Electronica 8 (9), pp. 1-17 : 6-8

Bairdoppilata conformis ( Terquem, 1878)

Figure 6.1

1878 Bairdia subdeltoidea Münster var. conformis Terquem , p. 93, pl. 10, figs. 17 a-c.

1883a Bairdia subdeltoidea Münster ; Seguenza, p. 58.

1883b Bairdia subdeltoidea Münster ; Seguenza, p. 124, pl. 1, fig. 8.

1975 Bairdia conformis (Terquem) ; Bonaduce et al., p. 22, pl. 6, figs. 5-10.

1980 Bairdia conformis (Terquem) ; Colalongo and Pasini, p. 52, pl. 1, fig. 5.

2000 Bairdoppilata conformis (Terquem) ; Aiello et al., p. 85, pl. 1, fig. 2.

2008 Bairdia conformis (Terquem) ; Sciuto and Rosso, p. 35, pl. 1, fig. 2.

Remarks. According to Maddocks (1969), the specimens have been referred to the genus Bairdoppilata Coryell et al., 1935 on the basis of the carapace lateral outline, that is rounded and sub hexagonal, and the muscle scar pattern which is shown in Maddocks (1969 , figure 3g).

Among the ostracods found in the SML samples, B. conformis is by far the most abundant species, one of two found alive. Both adult and juvenile specimens are present. It is particularly abundant in the MM facies, while it is rare in the FM facies.

B. conformis shows a present-day very wide bathymetrical distribution that includes the whole Circalittoral and the Bathyal Zone in both the Atlantic Ocean and the Mediterranean Sea ( Bonaduce et al., 1983; Whatley and Coles, 1987; Guernet and Lethiers, 1989; Montenegro et al., 1998).

B. conformis has been reported in Plio-Pleistocene sediments deposited in deep environments ( Aiello et al., 2000; Sciuto and Rosso, 2008).

Figures

FIGURE 6. 1, Bairdoppilata conformis (Terquem, 1878). PMC. O FS 16. RV, external lateral view (scale bar equals 500 µm); 2, Bythocypris obtusata (Sars, 1866). PMC. O FS 17. LV, external lateral view (scale bar equals 500 µm); 3, Anchistrocheles tenera (Breman, 1975). PMC. O FS 18. LV, external lateral view (scale bar equals 200 µm); 4, Macropyxis adriatica (Breman, 1975). PMC. O FS 19. LV, external lateral view (scale bar equals 500 µm); 5, Argilloecia acuminata Müller, 1894. PMC. O FS 20. RV, internal lateral view (scale bar equals 100 µm); 6, Krithe monosteracensis (Seguenza, 1880). PMC. O FS 21. RV, internal lateral view (trasparency, scale bar equals 250 µm); 7, Echinocythereis echinata Sars, 1866. PMC. O FS 22. RV, external lateral view (scale bar equals 500 µm); 8, Henryhowella ex H. hirta (Costa, 1853) group. PMC. O FS 23. LV, external lateral view (scale bar equals 200 µm); 9, Bathycythere vanstraateni Sissingh, 1971. PMC. O FS 24. RV, external lateral view (scale bar equals 200 µm); 10, Cytheropteron hadriaricum Bonaduce et al., 1975. PMC. O FS 25. RV, external lateral view (scale bar equals 100 µm); 11, Cytheropteron testudo Sars, 1869. PMC. O FS 26. RV, external lateral view (scale bar equals 200 µm); 12, Pseudocythere caudata Sars, 1866. PMC. O FS 27. LV, external lateral view (scale bar equals 200 µm); 13, Monoceratina mediterranea Sissingh, 1971. PMC. O FS 28. RV, external lateral view (scale equals bar 200 µm); 14, Paradoxostoma simile Müller, 1894. PMC. O FS 29. LV, internal lateral view (trasparency, scale bar equals 200 µm). (PMC. O FS 16–29 = Paleontological Museum Catania. Ostracoda Figured Specimens number 16 to 29. RV = right valve; LV = left valve).