Cytheropteron testudo Sars, 1869

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 : 9

Cytheropteron testudo Sars, 1869

Figure 6.11

1869 Cytheropteron testudo Sars , p.173, pl. 173, fig. 1.

1889 Cytheropteron testudo Sars ; Brady and Norman, p. 219, pl. 21, figs. 1, 2.

1985 Cytheropteron testudo Sars ; Montcharmont-Zei et al., p. 30, pl. 1, fig. 6.

1999 Cytheropteron testudo Sars ; Swanson and Ayress, p. 157, pl. 4, figs. 1-12, pl. 5, figs.1-13, pl. 6, figs. 10-12.

2003 Cytheropteron testudo Sars ; Stepanova et al., p. 31, pl. 11, figs. 5, 6.

2011 Cytheropteron testudo Sars ; Faranda and Gliozzi, p. 82, fig. 12.

2012 Cytheropteron testudo Sars ; Sciuto, p. 122, fig. 3a.

Remarks. C. testudo Sars, 1869 is presently restricted to the area between the Norwegian coasts and the Arctic bioprovince. Consequently, it is considered as one of the northern guests widespread in the Mediterranean during the Quaternary ( Faranda and Gliozzi, 2011). This species has been found in western Laptev Sea, at 68 m water depth by Stepanova et al. (2003); along the Norwegian coast, at depths of 80 to 240 m, and in the Recent Atlantic, between 1380 and 3526 m water depth by Dingle and Lord (1990); in the Queensland Plateau (SW Pacific) in Holocene to Recent sediments deeper than 500 m by Swanson and Ayress (1999). As fossils, the species has been reported from the Early Pliocene to the Quaternary from bathyal sediments of the Atlantic Ocean ( Whatley and Coles, 1987) and from to Early Pleistocene in bathyal sediments of the Mount S. Nicola section ( Aiello et al., 2000). In the Mediterranean Sea its last occurrence corresponds to the Last Glacial (Montcharmont-Zei et al., 1985). Therefore C. testudo could be considered as a stenothermic species restricted to very cold waters independently of depth.

This species was found only in the Framework Corals facies (CF).

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).