Callistocythere cranekeyensis ( Puri, 1960 )

Luz, Nathália Carvalho Da & Coimbra, João Carlos, 2022, Ostracods (Crustacea: Ostracoda) of the Vitoria-Trindade Chain, Southwestern Atlantic, Zootaxa 5188 (4), pp. 301-329 : 308

Callistocythere cranekeyensis ( Puri, 1960)

Fig. 3 : 19–20

1960 Leptocythere cranekeyensis Puri , p. 114, figs. 12–13.

1995 Callistocythere cranekeyensis (Puri) . Coimbra et al., p. 120, pl. 1, figs. 9–11 (see this paper for a more complete synonymy).

1999a Callistocythere cranekeyensis (Puri) . Coimbra et al., p. 370, pl. 2, fig. 13; p. 372, tab. 1

2020 Callistocythere cranekeyensis (Puri) . Machado et al., p. 14, fig. 11E; p. 16 tab. 1.

Figured specimens. MP-O-2818, C, RV length: 0.367 mm, RV height: 0.217 mm; MP-O-2819, C, LV length: 0.354 mm, LV height: 0.206 mm.

Locality. Trindade Island , site Lixo Bay, Sample M17022 N.

Material. 1 RV and 7 C (dead assemblage).

Remarks. Callistocythere cranekeyensis is a rare species, occurring in small numbers in two samples of Trindade Island, with no specimens recorded in the live assemblages. The same can be observed on the Brazilian shelf, in which it is restricted to a small portion of the Northern and Northeastern regions, in a depth range of 10 to 40 m ( Coimbra et al. 1995).

Stratigraphic range. Holocene.

Occurrence and distribution. In the study area, the species occur s in Trindade Island in the following localities: Racha Island, Lixo Bay, and Orelhas Bay ( Tab. 3 ). It also occurs in modern sediments of Brazilian Northern and Northeastern shelves, Florida Bay, Puerto Rico, Belize, and the Gulf of Mexico (see references in the synonymy list).

Figures

FIGURE 3. 1–2: Hemicytherura bradyi. 1) MP-O-2820, RV; 2) MP-O-2821, LV. 3–9: Hemicytherura trindadensis sp. nov. 3) MP-O-2822, RV, holotype; 4) MP-O-2822, LV, paratype; 5) MP-O-2823, RV, paratype; 6) MP-O-2823, LV, paratype; 7) MP- O-2823, RV, paratype, internal view; 8) MP-O-2823, LV, paratype, internal view; 9) MP-O-2824, paratype, dorsal view. 10–16: Semicytherura parva sp. nov. 10) MP-O-2825, female, RV, holotype.; 11) MP-O-2826, female, LV, paratype; 12) MP-O-2827, male, RV, paratype; 13) MP-O-2828, male, LV, paratype; 14) MP-O-2827, male, RV, paratype, internal view; 15) MP-O-2828, male, LV, paratype, internal view; 16) MP-O-2825, female, RV, paratype, hinge. 17–18: Semicytherura sp. 17) MP-O-2830, RV; 18) MP-O-2830, LV. 19–20: Callistocythere cranekeyensis. 19) MP-O-2818, carapace, RV; 20) MP-O-2819, carapace, LV. 21–22: Loxoconcha forda. 21) MP-O-2831, RV; 22) MP-O-2832, LV. 23–24: Loxoconcha foveata. 23) MP-O-2833, female, RV; 24) MP-O-2834, female, LV. Scale bar: 100 µm.