Loxoconcha foveata Hartmann, 1956

Luz, Nathália Carvalho Da & Coimbra, João Carlos, 2022, Ostracods (Crustacea: Ostracoda) of the Vitoria-Trindade Chain, Southwestern Atlantic, Zootaxa 5188 (4), pp. 301-329 : 310

Loxoconcha foveata Hartmann, 1956

Fig. 3 : 23–24

1956 Loxoconcha foveata Hartmann , p. 46, figs. 72–78.

2009 Loxoconcha bullata Hartmann. Coimbra et al. , p. 131, tab. 5.3; p. 135, tab. 5.5 (non) 1956 Loxoconcha bullata Hartmann , p. 49, figs. 79–87.

2011 Loxoconcha bullata Hartmann. Coimbra & Bergue , figs. 3.17e –g (non) 1956 Loxoconcha bullata Hartmann , p. 49, figs. 79–87.

2012 Loxoconcha bullata Hartmann. Coimbra & Carreño , p. 194, tab. 2 (non) 1956 Loxoconcha bullata Hartmann , p. 49, figs. 79–87.

Figured specimens. MP-O-2833, female, RV, length: 0.541 mm, height: 0.404 mm; MP-O-2834, female, LV, length: 0.569 mm, height: 0.380 mm.

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

Material. Dead assemblage: 220 RV, 208 LV, 156 C, and 112 juveniles . Living assemblage: 7 adults.

Remarks. Loxoconcha foveata is quite similar to L. bullata Hartmann, 1956 but differs in the ornament characters, which are more developed in the first one.

Stratigraphic range. Holocene.

Occurrence and distribution. In the study area, the species occurs in Trindade Island in the following localities: Príncipe Beach, Lixo Bay, Orelhas Bay, Racha Island, North Tip, Crista do Galo Pool, Cabritos Beach, Portugueses Bay, Andradas Beach, Tartarugas Beach, Tartarugas Parcel ( Tab. 3 ). It also occurs in the littoral of Santos and Porto Novo (São Paulo State), southeastern Brazil (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.