Macunhaella Almeida-Lima, Guzmán, Maia, Jesus & Piovesan, 2024, gen. nov.

Macunhaella gen. nov. (Fig. 4G–J) Zoobank-link: urn:lsid:zoobank.org:act: B6F27B50-999E-4CC1-A398-CA445EB326FE Derivation of name: In memory of Maria da Conceição Cunha for her contribution to the knowledge of non-marine ostracods of Brazil. Type-species: Macunhaella posteroaltis sp. nov. Stratigraphic and geographic distribution: Aptian, Crato Formation, Santana Group, Araripe Basin, Crato Municipality, Ceará State, Brazil (Guzmán et al. 2022, 2023; this study). Diagnosis: A new genus of Cyprididae with a sub-rectangular carapace, greater height in the posterior region and obtuse cardinal angles. Description: Carapace sub-rectangular in lateral view; fusiform in dorsal view. Ventral margin straight; dorsal margin straight and slightly sloping towards the anterior region. Posterior region higher than anterior. Anterior and posterior cardinal angles obtuse. Remarks: The new genus Macunhaella has a higher posterior region, which makes it different from other representatives of the Cyprididae family, and this is its most evident distinctive feature. This is a typical characteristic of representatives of the Darwinuloidea superfamily, however, the individuals of Macunhaella gen. nov. have carapaces with a fusiform outline in dorsal view, greater median width and are narrower than any genera within Darwinuloidea, in addition to presenting a different pattern of adductor muscle scar than that described for this superfamily (Fig. 4J). The genus Paracypridea Swain, 1946, also has the same features as the new genus Macunhaella but differs significantly from it by displaying a rostrum in the anteroventral region of the carapace.