New Non-Marine Ostracod Genera And Species Of Aptian Age From Araripe Basin, Northeast Brazil Author Almeida-Lima, Débora Soares De Laboratório de Micropaleontologia Aplicada (LMA / LAGESE), Instituto de Pesquisa em Petróleo e Energia (LITPEG), Universidade Federal de Pernambuco, Av. da Arquitetura, s / n, 50740 - 540, Recife, PE, Brazil & Programa de Pós-Graduação em Geociências, Departamento de Geologia, Centro de Tecnologia e Geociências, Universidade Federal de Pernambuco, Av. da Arquitetura, s / n, 50740 - 540, Recife, PE, Brazil Author Guzmán, Juliana Laboratório de Micropaleontologia Aplicada (LMA / LAGESE), Instituto de Pesquisa em Petróleo e Energia (LITPEG), Universidade Federal de Pernambuco, Av. da Arquitetura, s / n, 50740 - 540, Recife, PE, Brazil Author Maia, Renata Juliana Arruda Laboratório de Micropaleontologia Aplicada (LMA / LAGESE), Instituto de Pesquisa em Petróleo e Energia (LITPEG), Universidade Federal de Pernambuco, Av. da Arquitetura, s / n, 50740 - 540, Recife, PE, Brazil & Programa de Pós-Graduação em Geociências, Departamento de Geologia, Centro de Tecnologia e Geociências, Universidade Federal de Pernambuco, Av. da Arquitetura, s / n, 50740 - 540, Recife, PE, Brazil Author Jesus, Ariany De PETROBRAS / CENPES / PDIEP / GEG / CE, Av. Horácio Macedo, 950 Ilha do Fundão, 21941 - 915, Rio de Janeiro, RJ, Brazil Author Piovesan, Enelise Katia Laboratório de Micropaleontologia Aplicada (LMA / LAGESE), Instituto de Pesquisa em Petróleo e Energia (LITPEG), Universidade Federal de Pernambuco, Av. da Arquitetura, s / n, 50740 - 540, Recife, PE, Brazil & Programa de Pós-Graduação em Geociências, Departamento de Geologia, Centro de Tecnologia e Geociências, Universidade Federal de Pernambuco, Av. da Arquitetura, s / n, 50740 - 540, Recife, PE, Brazil text Zootaxa 2024 2024-08-20 5496 3 401 416 http://dx.doi.org/10.11646/zootaxa.5496.3.6 journal article 10.11646/zootaxa.5496.3.6 1175-5326 13346885 E4290B13-40CF-4BED-97C5-E4FA7AC246C5 Wolburgiopsis magnafossa sp. nov. ( Fig. 4Q–S ; Fig. 5E ) Zoobank-link: urn:lsid:zoobank.org:act: D4B54EA7-84C0-4C28-B31E-B3BDD65134BF Holotype : LMA-00514, L: 0.38 mm , H: 0.20 mm , W: 0.16 mm . Paratype : LMA-00515, 0.20 mm , H: 0.11 mm , W: 0.09 mm . Material: Four carapaces. Derivation of name: In reference to the deep fossae present in the ornamentation of the carapace of this species. Type locality: Ipubi Formation, Araripe Basin, Nova Olinda Municipality, Ceará State , Brazil . Type horizon: Ipubi Formation , Araripe Basin , Nova Olinda Municipality , Ceará State , Brazil . 2-AR-SR-1A-CE well core sample, depth interval 54.40–54.43 m . Stratigraphic and geographic distribution: Aptian:Ipubi Formation,Araripe Basin, Nova Olinda Municipality, Ceará State , Brazil (this study). Diagnosis: A species with sub-trapezoidal to sub-rectangular outline in lateral view, ellipsoidal in dorsal view; surface ornamentation with deep fossae and punctuated muri; prominent overlap of the valves at the cardinal angle regions. Description: Carapace sub-trapezoidal to sub-rectangular in lateral view; ellipsoidal in dorsal view. Ventral margin straight to slightly concave; dorsal margin almost straight, with a slight slope to the posterior margin. Anterior margin asymmetrically rounded; posterior margin sub-rounded and equicurvate. Two shallow sulci, the first one smaller and located at the anterodorsal region and the second one at mid-length extending from dorsal margin to mid-height. LV overlapping RV at the anterodorsal and posterodorsal regions, more prominently at the cardinal angle regions and subtly at the anteroventral region. Maximum height at the anterior cardinal angle; greater length at mid-height; greater width behind the second sulci. Well-defined and obtuse cardinal angles. Ornamented surface with reticula formed by thick and punctuated muri; deep and sub-rounded fossae at the median region, with deformities near the sulci; however, to the anterolateral, posterolateral, ventrolateral and ventral outlines, the reticulation becomes more elongated forming subparallel rows without punctuation; the hinge margin has no ornamentation. Sexual dimorphism and internal features not observed. Remarks: This is the first record of Wolburgiopsis for the Araripe Basin, but the genus had already been recovered in the Sanfranciscana Basin (Lower Cretaceous) ( Do Carmo et al . 2004 ) and the Paraná Basin (Upper Cretaceous) ( Dias-Brito et al . 2001 ; Gobbo & Bertini 2023 ; Gobbo-Rodrigues et al . 1999 ). Do Carmo et al . (2004) identified two species in their study, Wolburgiopsis plastica ( Musacchio, 1970 ) , which is similar to Wolburgiopsis magnafossa sp. nov. , but differs from it by having an almost straight dorsal margin along its entire length and a more pronounced concave ventral margin and Wolburgiopsis chinamuertensis ( Musacchio, 1970 ) , a species that has an ornamented carapace with tubercles (three dorsal and two ventrolateral) joined together by a crest that expands in the ventral region, which distinguishes it from the new species. Dias-Brito et al . (2001) and Gobbo & Bertini (2023) identify the species Wolburgiopsis neocretacica ( Bertels, 1972 ) , which has a completely reticulated carapace (composed of fine muri) and an almost straight dorsal margin along its entire length and Wolburgiopsis vicinalis Uliana & Musacchio, 1978 , which has a subelliptical lateral outline. These features distinguish them from the new species here presented.