Cytherella, Jones, 1849

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 : 11

Cytherella sp. 1

Fig. 5K

Material examined

BRAZIL: Estre outcrop, Rosário do Catete Municipality, Sergipe State (samples MP-1427 and MP- 1429), approximate coordinates 10°41' S, 37°02' W.

Measurements

Hypotype (CP-670): valve: height = 0.51 mm.

Remarks

Despite its unusual fine, nodose ornamentation, Cytherella sp. 1 is comparable in overall shape to several Cytherella species with Albian (partly or not) distribution, which justifies its generic attribution. These include Cytherella ovata ( Roemer, 1841) (several sedimentary units, ages and locations in Europe, and possibly nearby regions in America, Africa and Asia) ( Brown 1957; Herrig 1966; Bassoulet & Damotte 1969; Swain & Brown 1972; Majoran 1989; Witte et al. 1992; El-Nady et al. 2008); Cytherella comanchensis Alexander, 1929 (Fort Worth Formation, United States, upper Albian) ( Alexander 1929); and Cytherella fredericksburgensis Alexander, 1932 (Goodland Formation, United States, Albian) ( Alexander 1932). However, because of the lack of well-preserved specimens in the current samples, it was not possible to provide a more specific identification of them.

Paleoecology and distribution

Cytherella sp. 1 is a marine, outer shelf species occurring in the Taquari Member, Riachuelo Formation, Sergipe-Alagoas Basin, Brazil, upper Albian (earlier than the Reticulocosta edrianae subzone (MSA- 0.4)), Aracajuia benderi zone (MSA-0).

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.