Theriosynoecum trigonalis Krömmelbein & Weber, 1971

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 : 53

Theriosynoecum trigonalis Krömmelbein & Weber, 1971

Fig. 13 , 4a–c

1971 Theriosynoecum trigonalis n. sp. —Krömmelbein & Weber, p. 60–61, pl. 11, fig. 51.

Diagnosis: In lateral view a very stocky species of Theriosynoecum , in dorsal view decidedly triangular. Posterior part of carapace projecting high above the dorsal margin, more or less tapering to a point. Main sulcus very long, convexly arched. Surface sculpture a coarse network.

Holotype: Carapace, BfB 7828.

Paratypes: Not deposited.

Dimensions: Holotype, length 0.79mm, width 0.65mm.

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 13. a = left lateral, b = dorsal, and c = right lateral views. 1a–c. Theriosynoecum isoplektum Krömmelbein & Weber, 1971. Holotype, C ♂?, BfB 7825, l 0.77mm, h 0.41mm, w 0.38mm. 2a–c. Theriosynoecum isoplektum Krömmelbein & Weber, 1971. Paratype, C ♀?, BfB 7826, l 0.72mm, h 0.38mm, w 0.37mm. 3a–c. Theriosynoecum ilhasensis Krömmelbein & Weber, 1971. Holotype, C, BfB 7827, l 0.90mm, h 0.51mm, w 0.51mm. 4a–c. Theriosynoecum trigonalis Krömmelbein & Weber, 1971. Holotype, C, BfB 7828, l 0.79mm, w 0.65mm. 5a–c. Theriosynoecum ventralatum Krömmelbein & Weber, 1971. Holotype, C ♀, BfB 7829, l 0.90mm, h 0.56mm, w 0.68mm. 6a–c. Theriosynoecum ventralatum Krömmelbein & Weber, 1971. Paratype, C ♂, BfB 7830, l 0.90mm, h 0.55mm, w 0.55mm. 7a–c. Theriosynoecum quadrinodosum Krömmelbein & Weber, 1971. Holotype, C ♀, BfB 7831, l 0.70mm, h 0.40mm, w 0.37mm. 8a–c. Theriosynoecum quadrinodosum Krömmelbein & Weber, 1971. Paratype, C ♂, BfB 7832, l 0.70mm, h 0.39mm, w 0.31mm. 9a–c. Theriosynoecum miritiensis Krömmelbein & Weber, 1971. Holotype, C ♀, BfB 7834, l 0.80mm. 10a–c. Theriosynoecum miritiensis Krömmelbein & Weber, 1971. Paratype, C ♂, BfB 7835, l 0.78mm, h 0.48mm, w 0.43mm. 11a–c. Theriosynoecum wicheri Krömmelbein & Weber, 1971. Holotype, C ♂, BfB 8022, l 0.76mm, h 0.42mm, w 0.36mm. 12a–c. Theriosynoecum wicheri Krömmelbein & Weber, 1971. Paratype, C ♀, BfB 8023, l 0.76mm, h 0.43mm, w 0.48mm.