A new genus and species of brachyuran crab (Crustacea, Decapoda) from the Aptian-Albian (Cretaceous) of the Araripe Sedimentary Basin, Brazil. (June 2022)

• Record Type: Journal Article
• Authors: Santana, William; Tavares, Marcos; Muniz Martins, Carlos Antônio; Pereira Melo, José Patrício; Pinheiro, Allysson P.
• Is Part Of: Journal of South American earth sciences. Volume 116(2022)
• Publication Date: 2022-06
• Subjects: Fossil eubrachyura -- Santana Group -- Romualdo Formation -- Carbonatic concretions; MPPCN Museu de Paleontologia Plácido Cidade Nuvens; Geology -- Latin America -- Periodicals; Earth sciences -- Latin America -- Periodicals; Geology -- Antarctica -- Periodicals; Earth sciences -- Antarctica -- Periodicals; Geology -- Caribbean Area -- Periodicals; Earth sciences -- Caribbean Area -- Periodicals; Géologie -- Amérique latine -- Périodiques; Sciences de la terre -- Amérique latine -- Périodiques; Géologie -- Antarctique -- Périodiques; Sciences de la terre -- Antarctique -- Périodiques; Géologie -- Caraïbes (Région) -- Périodiques; Sciences de la terre -- Caraïbes (Région) -- Périodiques; Earth sciences; Geology; Antarctica; Caribbean Area; Latin America; Periodicals; 550.5
• DOI: 10.1016/j.jsames.2022.103848
• Languages: English
• ISSNs: 0895-9811

Abstract

Abstract: A new brachyuran crab genus and species, Chronocancer camilosantanai, is described from carbonatic concretions of the Romualdo Formation of the Santana Group, Araripe Sedimentary Basin, northeastern Brazil. Chronocancer camilosantanai n. gen. n. sp. is provisionally assigned to the Orithopsidae. The new genus is superficially suggestive of the orithopsid Bellcarcinus Luque, 2014 (Upper Aptian of Colombia), of which it differs by a combination of characters including: carapace longer than wide, longitudinally suboval, wider anteriorly; internal supraorbital tooth broad triangular; anterolateral margins toothless; carapace hepatic, gastric and cardiac regions devoid of tubercles. The new species is briefly compared to all other known brachyurans found in the Araripe Sedimentary Basin. Highlights: A new genus and species of brachyuran crab is described. This is the fourth crab species described from Romualdo Formation of the Araripe Basin. Comparisons are made with all known species and a discussion about the family position is made.