Cytherelloidea aff. globosa Kaye, 1964

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 : 13

Cytherelloidea aff. globosa Kaye, 1964

Fig. 5J

? Cytherelloidea globosa Kaye, 1964: 71 , pl. 9, figs 9.7, 9.9–9.10.

Cytherelloidea globosa –? Weaver 1982: 21, figs 3.20–3.21.

Material examined

BRAZIL: Estre outcrop, Rosário do Catete Municipality, Sergipe State (samples MP-1422 and MP- 1428), approximate coordinates 10°41' S, 37°02' W.

Measurements

Hypotype (CP-756): right valve: length = 0.51 mm, height = 0.29 mm.

Remarks

The specimens of Cytherelloidea aff. globosa Kaye, 1964 are similar to those of Cytherella globosa Kaye, 1964 , from the Albian–Cenomanian of England ( Kaye 1964; Weaver 1982). They differ, though, by a more pronouncedly sloping posterior section of the dorsal margin and the absence of the posteroventral tubercle in right view. It is not clear, however, to which extent these differences are merely morphological or caused by diagenetic processes, considering that the present specimens are poorly preserved.

Paleoecology and distribution

Cytherelloidea aff. globosa is a marine, outer shelf species that occurs in the Taquari Member, Riachuelo Formation, Sergipe-Alagoas Basin, Brazil, middle Albian, Aracajuia benderi zone (MSA-0), Reticulocosta edrianae subzone (MSA-0.4).

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.