Xestoleberis umbonata Whatley et al. 1998

Luz, Nathália Carvalho Da & Coimbra, João Carlos, 2015, The genus Xestoleberis (Ostracoda: Xestoleberididae) in the Northern, Northeastern and Eastern regions of the Brazilian continental shelf, Zootaxa 3974 (2), pp. 177-195 : 184-185

Xestoleberis umbonata Whatley et al. 1998

Fig. 3 : 13–14

1998 Xestoleberis umbonata Whatley et al. , p. 112, pl. 6, figs. 13–18. 2005 Xestoleberis umbonata Machado et al. , p. 252, pl. 4, fig. 13, tabs. 1–2. 2008 Xestoleberis umbonata Machado , p.126, tab. 5.

Material. 115 adults and 4 juveniles.

Figured specimens. MP-O-1606 and MP-O-1607.

Occurrence and distribution. In the present study, this species occurs in the southernmost part of the Eastern region of the Brazilian continental shelf, around Cabo Frio ( Fig. 2 ; Tab. 1) at a depth range of 35 to 94 m.

Xestoleberis umbonata was first recorded in Recent sediments of Argentina by Whatley et al. (1998). Ramos (1998) also recorded this species in the Southern region of Brazil, where it was quite abundant. According to Machado et al. (2005), X. umbonata is one of the dominant marine ostracod species off the Cabo Frio area.

Figures

FIGURE 2. Distribution of Xestoleberis species in Brazilian continental shelf. The hatched area corresponds to the Transitional Zone of Coimbra et al. (1995). Each dot represents one sample.

FIGURE 3. 1 – 12. Xestoleberis inesae sp. nov. 1. Female, Carapace, RV (MP-O- 1608, holotype). 2. Female, Carapace, LV (MP-O- 1608, holotype). 3. Female, dorsal view (MP-O- 1608, holotype). 4. Male, RV (MP-O- 1609). 5. Male, LV (MP-O- 1609). 6. Male, dorsal view (MP-O- 1610). 7. Hinge (MP-O- 1611). 8. Central and mandibular muscle scars, RV (MP-O- 1612). 9. Female, ventral view (MP-O- 1608, holotype). 10. Lip-type normal pore canal (MP-O- 1608, holotype). 11. Schematic drawing of some RV internal features. 12. Xestoleberis - spot (MP-O- 1607). 13 – 14. Xestoleberis umbonata Whatley et al. 1998. 13. Male, RV (MP-O- 1606). 14. Male, LV (MP-O- 1607).