Praebythoceratina amsittenensis ( Andreu-Boussut, 1991 ) Antonietto & Carmo & Viviers & Neto & Hunt, 2016

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 : 24-25

Praebythoceratina amsittenensis ( Andreu-Boussut, 1991) comb. nov.

Fig. 6 N–P

Bythoceratina amsittenensis Andreu-Boussut, 1991: 496 , figs 41.6–41.11.

“ Patellacythere ” GA E 27 – Grosdidier 1979 pars: 8, fig. 51a, c.

Bythoceratina ? sp. P1 –? Viviers et al. 2000: 411, figs 11.12–11.14.

non “ Patellacythere ” GA E 27 – Grosdidier 1979 pars: 8, fig. 51b.

New material examined

BRAZIL: 1-CPB-1 well, Carmópolis Municipality, Sergipe State (depths of 345.5, 348 and 348.5 m); 7-CP-252 well, Santo Amaro das Brotas Municipality, Sergipe State (depths of 473.8 and 475.3 m); Estre outcrop, Rosário do Catete Municipality, Sergipe State (sample MP-1423), approximate coordinates 10°41' S, 37°02' W; Fazenda Santa Bárbara outcrop, Rosário do Catete Municipality, Sergipe State (sample MP-1420), approximate coordinates 10°39' S, 37°01' W; P384 outcrop, Riachuelo Municipality, Sergipe State (samples MP-1497, MP-1506, MP-1508 and MP-1510 to MP-1513), approximate coordinates 10°43' S, 37°12' W; Porto dos Barcos 3 outcrop, Riachuelo Municipality, Sergipe State (samples MP-1460 to MP-1463, MP-1464, MP-1468 to MP-1472, MP-1476, MP-1477 and MP-1481), approximate coordinates 10°43' S, 37°10' W.

Type locality and stratum

Samples Am.95, Am.100, Am.105 and Am.110, Jbel Amsittène, Morocco; Oued Tidsi Formation, Albian.

Measurements

Homeotype (CP-687): right valve: length = 0.47 mm, height = 0.26 mm.

Homeotype (CP-688): right valve: length = 0.46 mm, height = 0.23 mm.

Homeotype (CP-689): carapace: length = 0.46 mm, height = 0.23 mm, width = 0.22 mm. Homeotype (CP-769): left valve: length = 0.43 mm, height = 0.23 mm.

Remarks

The generic identification is based on Becker (1990), while the specific follows Andreu-Boussut (1991). Some of the specimens from the Aptian of Gabon identified by Grosdidier (1979) as “ Patellacythere ” GA E 27 belong to this species, while others are related to Patellacythere shimonensis ( Rosenfeld & Raab, 1983) comb. nov. Bythoceratina ? sp. P 1 in Viviers et al. (2000) probably also belongs to the present species, but it is not possible to fully confirm this, as the figured specimen is poorly preserved.

Paleoecology and distribution

Praebythoceratina amsittenensis comb. nov. is a marine, shelf species occurring in the following localities and stages: Madiéla Formation, Gabon Basin, Gabon, upper Aptian–lower Albian ( Grosdidier 1979); Oued Tidsi Formation, Morocco,Albian ( Andreu-Boussut 1991); and Taquari Member, Riachuelo Formation, Sergipe-Alagoas Basin, Brazil, uppermost Aptian–middle Albian, Aracajuia benderi zone (MSA-0), Sergipella viviersae (MSA-0.2) and Praebythoceratina amsittenensis (MSA-0.3) subzones.