Work

A new species of Lonchidiidae (Hybodontiformes) from the Late Jurassic of Brazil (Aliança Formation, Jatobá Basin)

Year: 2026

Type: article

Abstract: The Aliança Formation (Jatobá Basin) represents lacustrine deposits formed in oxygenated waters that hosted a diverse fauna, including Hybodontiform sharks. Within this group, the Family Lonchidiidae comprises 11 valid genera, with Parvodus previously reported in Brazilian deposits from the Brejo Santo Formation (Araripe Basin, Late Jurassic) and the Aliança Formation (Jatobá Basin, Late Jurassic). Here, we describe a new species of Parvodus based on isolated teeth from the Aliança Formation. A taxonomic reassessment of the genus is also presented, integrating its stratigraphic and geographic distribution. The new species provides novel insights into the evolutionary history of Lonchidiidae, with implications for the paleobiogeography of the group and the paleoenvironmental interpretation of the Aliança Formation. Importantly, this record expands the known distribution of Parvodus into the Upper Jurassic of South America.

Source: The Anatomical Record

DOI: 10.1002/ar.70120

Authors: Larissa de Souza Ribeiro, Marco Aurélio Gallo de França

Institution: Universidade Federal do Vale do São Francisco

Language: English

Topic: Paleontology and Evolutionary Biology

Subfield: Paleontology

Field: Earth and Planetary Sciences

Domain: Physical Sciences

Open Access status: hybrid

Estimated APC paid: $4,430

Funders: Conselho Nacional de Desenvolvimento Científico e Tecnológico, Fundação de Amparo à Ciência e Tecnologia do Estado de Pernambuco