Majungaella minuta, (Swain, 1976)

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 : 38

Metacytheropteron aff. minuta ( Swain, 1976)

Fig. 8 M–O

? Majungaella minuta Swain, 1976: 747 , figs 1.19–1.21, 1.23.

Eocytheropteron ? sp. –? Swain 1976: 745, fig. 2.14.

Metacytheropteron GA B 14 – Grosdidier 1979: 8, fig. 40a–c.

Metacytheropteron aff. sp. GA C 26 – Viviers et al. 2000: 414, fig. 15.9.

New material examined

BRAZIL: São José 1 outcrop, Riachuelo Municipality, Sergipe State (sample MP-1557), approximate coordinates 10°44' S, 37°13' W.

Measurements

Hypotype (CP-712): carapace: length = 0.33 mm, height = 0.17 mm, width = 0.16 mm.

Remarks

The generic diagnosis follows Oertli (1957) and the suprageneric diagnosis follows Gründel (1976). The reclassification of Metacytheropteron minuta ( Swain, 1976) has been suggested by several previous works, including Babinot & Colin (1988) and Piovesan et al. (2012), so the present authors have opted to perform it. The figured specimen possibly belongs to this species, although it differs significantly in the dorsal overlap (strong in Metacytheropteron minuta ). Still, it is co-specific with the ones identified as Metacytheropteron GA B 14 by Grosdidier (1979) and Metacytheropteron aff. sp. GA C 26 by Viviers et al. (2000).

Paleoecology and distribution

Metacytheropteron aff. minuta ( Swain, 1976) is a marine, shelf species occurring in the following localities and stages: Madiéla Formation, Gabon Basin, Gabon, Albian ( Grosdidier 1979); and Maruim Member, Riachuelo Formation, Sergipe-Alagoas Basin, Brazil, upper Albian, Aracajuia benderi zone (MSA-0), Metacytheropteron sp. aff. sp. GA C 24 subzone (MSA-0.5) ( Viviers et al. 2000); in the present work, expanded to the Angico Member, upper Aptian–lower Albian, Sergipella viviersae subzone (MSA-0.2).