Reconcavona uniacantha Krömmelbein, 1962

Bate, Raymond H., Horne, David J., Horne, Sarah E., Douglas, Lyndsey, Miller, Giles & Lord, Alan R., 2022, Non-marine Ostracoda (Crustacea) of the Early Cretaceous ‘ Pre-Salt’ sediments of Brazil: An illustrated catalogue of the type specimens of Wicher, Krömmelbein, Krömmelbein & Weber, and Bate, Zootaxa 5098 (1), pp. 1-84 : 22

Reconcavona uniacantha Krömmelbein, 1962

Fig. 5 , 4a–c

1962 Reconcavona uniacantha n. sp. —Krömmelbein, p. 487–488, pl. 62, fig. 63.

Diagnosis: A large Reconcavona with the anterior margin clearly pulled down towards the front and a strongly concavely indented middle part of the ventral margin. A spine-like blunt or pointed process on the posterior upper valve field, just underneath the posterior cardinal angle of each valve.

Holotype: Carapace, SMF Xe 4244.

Paratype: 1 carapace, SMF Xe 4245 .

Dimensions: Holotype, length 0.94mm, height 0.55mm.

Figures

FIGURE 4. a = left lateral, b = dorsal, and c = right lateral views. 1a–c. Cypridea (Sebastianites?) mataensis vercellinoi Krömmelbein, 1962. Holotype, C, SMF Xe 4201, l 1.12mm, h 0.78mm. 2a–c. Cypridea (Sebastianites?) onusta Krömmelbein, 1962. Holotype, C, SMF Xe 4205, l 1.20mm, h 0.78mm. 3a–c. Cypridea (Sebastianites?) sostensis Krömmelbein, 1962. Holotype, C, SMF Xe 4191, l 0.97mm, h 0.57mm. 4a–c. Cypridea (Morinina?) bibullata tribullata Krömmelbein, 1962. Holotype, C, SMF Xe 4212, l 0.99mm h 0.56mm. 5a–c. Cypridea (Morinina?) langei Krömmelbein, 1962. ‘Hypotype’, C, SMF Xe 4216, l 1.25 mm, h 0.66 mm. 6a–c. Cypridea (Morininoides) candeiensis Krömmelbein, 1962. Holotype, C, SMF Xe 4217, l 0.93mm, h 0.55mm. 7a–c. Cypridea (Morininoides) hadronodosa Krömmelbein, 1962. Holotype, C, SMF Xe 4222, l 1.06mm, h 0.70mm. 8a–c. Paracypridea elegans Krömmelbein, 1962. Holotype, C, SMF Xe 4165, l 1.05mm, h 0.59mm. 9a–c. Candona? gregaria Krömmelbein, 1962. Holotype, C, SMF Xe 4225, l 1.98mm, h 1.09mm. 10a–c. Candona? condensa Krömmelbein, 1962. Holotype, C, SMF Xe 4227, l 0.96mm, h 0.74mm. 11a–c. Candona? redunca Krömmelbein, 1962. Holotype, C, SMF Xe 4229, l 0.84mm, h 0.51mm. 12a–c. Reconcavona cancellata Krömmelbein, 1962. Holotype, C, SMF Xe 4236, l 0.81mm, h 0.47mm.

FIGURE 5. a = left lateral, b = dorsal, and c = right lateral views. 1a–c. Reconcavona swaini Krömmelbein, 1962. Holotype, C, SMF Xe 4238, l 0.79mm, h 0.46mm. 2a–c. Reconcavona centronodosa Krömmelbein, 1962. Holotype, C, SMF Xe 4240, l 0.67mm, h 0.41mm. 3a–c. Reconcavona uncinata Krömmelbein, 1962. Holotype, C, SMF Xe 4242, l 0.73mm, h 0.33mm. 4a–c. Reconcavona uniacantha Krömmelbein, 1962. Holotype, C, SMF Xe 4244, l 0.94mm, h 0.55mm. 5a–c. Ilyocypris sp. in Krömmelbein, 1962. C, SMF Xe 4246. l 0.65mm, h 0.35mm, w 0.31mm. 6a–c. Dolerocypris? marfinensis Krömmelbein, 1962. Holotype, C, SMF Xe 4248, l 0.78 mm, h 0.47 mm. 7a–c. Coriacina coriacea Krömmelbein, 1962. Holotype, C, SMF Xe 4259, l 0.73mm h 0.47mm. 8a–c. Ilhasina remanei remanei Krömmelbein, 1963. Holotype, C, SMF Xe 4650, l 0.76mm, h 0.45mm, w 0.34mm. 9a–c. Ilhasina remanei cuneiformis Krömmelbein, 1963. Holotype, C, SMF Xe 4652, l 0.71mm, h 0.40mm, w 0.40mm. 10a–c. Ilhasina torosa Krömmelbein, 1963. Holotype, C, SMF Xe 5654, l 0.89mm, h 0.54mm, w 0.54mm. 11a–c. Ilhasina amphotera Krömmelbein, 1963. Holotype, C, SMF Xe 4656, l 0.79mm, h 0.38mm, w 0.34mm. 12a–c. Salvadoriella redunca comitans Krömmelbein, 1963. Holotype, C, SMF Xe 4660, l 0.88mm, h 0.48mm, w 0.34mm.