Harbinia sinuata (Krommelbein & Weber, 1971) Do Carmo, 2013

Antonietto, Lucas Silveira, Carmo, Dermeval Aparecido do, Viviers, Marta Claudia, Neto, João Villar Queiroz & Hunt, Gene, 2016, Ostracoda (Arthropoda, Crustacea) from the Riachuelo Formation, Sergipe-Alagoas Basin, Brazil, Upper Aptian-Albian, European Journal of Taxonomy 244, pp. 1-57 : 21-22

Harbinia sinuata ? ( Krömmelbein & Weber, 1971) emend. Do Carmo et al. 2013

Fig. 6F

? Hourcqia angulata sinuata Krömmelbein & Weber, 1971: 35 , fig. 6.24a–c.

Harbinia sinuata –? Ramos et al. 2006: 344, fig. 4i–l. —? Do Carmo et al. 2008: 796, fig. 6.10. —? Do Carmo et al. 2013: 95, figs 4.1–4.24.

Pattersoncypris sinuata –? Poropat & Colin 2012: 714, fig. 4.2.

“ Cytheridea ”? sp. gr. 201/218 –? Moura & Praça 1985: 407, figs 2.19, 2.22.

“ Cypridea ” spp. ex. gr. 201/218 –? Moura 1988: 1212, figs 2.7, 2.10.

Hourcqia angulata ssp. –? Silva-Telles Júnior & Viana 1990: 320, fig. 3.4.

Hourcqia gr. angulata – Colin & Dépêche 1997: 434, fig. 2.19.

New material examined

BRAZIL: 1-CPB-1 well, Carmópolis Municipality, Sergipe State (depth of 354.5 m); 7-CP-252 well, Santo Amaro das Brotas Municipality, Sergipe State (depths of 478.45, 478.85, 481.6, 482.9 and 484.4 m).

Measurements

Homeotype (LBP 9): carapace: length = 0.93 mm, height = 0.76 mm.

Remarks

The suprageneric taxonomy follows Hou et al. (2002) and the generic one follows Do Carmo et al. (2013). However, although the specimens observed are very similar to Harbinia sinuata ( Krömmelbein & Weber, 1971) , they differ in the shape of the dorsal anterior margin adjacent to the “hump” region, characteristic of the genus Harbinia Tsao, 1959. In the specimens of Krömmelbein & Weber (1971) and Do Carmo et al. (2013), this area of the dorsal margin is flatter, which overall widens the anterior end. The present specimens seem to be similarly, although more discretely, ornamented as other Harbinia species ( Krömmelbein & Weber 1971; Hou 1984; Antonietto et al. 2012; Do Carmo et al. 2013). For these reasons, the current specimens are identified dubiously as Harbinia sinuata .

Paleoecology and distribution

Harbinia sinuata ? is a freshwater to transitional species occurring in the following localities and stages: Bongor, Doba and Doseo Basins, Chad, upper Aptian ( Colin & Dépêche 1997); and Riachuelo Formation, Sergipe-Alagoas Basin ( Krömmelbein & Weber 1971), Brazil, upper Aptian, Aracajuia benderi zone (MSA-0), Harbinia sinuata ? subzone (MSA-0.1).