Bairdoppilata

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 : 16

Bairdoppilata sp. 1

Fig. 5M

Material examined

BRAZIL: Massapê outcrop, Riachuelo Municipality, Sergipe State (samples MP-1516, MP-1518, MP- 1520, MP-1545 and MP-1546), approximate coordinates 10°06' S, 37°10' W.

Measurements

Hypotype (CP-678): right valve: length = 0.69 mm, height = 0.32 mm.

Remarks

Bairdoppilata sp. 1 is remarkable among Bairdoppilata species of the lower Cretaceous because of the combination of the following features: an elongate overall shape, elongate posterior end, comparable to B. southerhamensis Weaver, 1982 (although this species' carapace displays greater height) ( Weaver 1982), and punctuate ornamentation. The current specimens probably represent a new species, but due to the small amount of material (composed solely of valves) recovered, we opt to leave it in open nomenclature.

Paleoecology and distribution

Bairdoppilata sp. 1 is a marine, shelf species occurring in the Maruim Member, Riachuelo Formation, Sergipe-Alagoas Basin, Brazil, Albian, Aracajuia antiqua zone (MSA-1).

Figures

Fig. 5. [facing page] Ostracods of the Riachuelo Formation, Sergipe-Alagoas Basin, Albian, Brazil. – A–C. Cytherella besrineensis (Bischoff, 1964) comb. nov. A. CP-669, right lateral view. B–C. CP-668. B. Left lateral view. C. Dorsal view. – D–F. Conchoecia? sp. 1. D, F. LBP 10. D. Right lateral view. F. Dorsal view. E. LBP 11, left lateral view. – G–I. Cytherelloidea btaterensis Bischoff, 1964. G. CP-671, right lateral view. H. CP-672, left lateral view. I. CP-673, dorsal view. – J. Cytherelloidea aff. globosa Kaye, 1964, CP-756, right lateral view. – K. Cytherella sp. 1, CP-670, lateral view. – L. Bairdoppilata pseudoseptentrionalis Mertens, 1956, CP-676, right lateral view. – M. Bairdoppilata sp. 1, CP-678, right lateral view. – N–P. Bairdoppilata comanchensis (Alexander, 1929) comb. nov., CP-674. N. Left lateral view. O. Right lateral view. P. Dorsal view. – Q–S. Bairdoppilata sp. 2, CP-757. Q. Right lateral view. R. Left lateral view. S. Dorsal view. Scale bars = 100 μm.