Ichnofossils associated with lingulide shells from the Lower Permian of Brazil

Author(s)

Vinn, Olev ^[1] ; Zabini, Carolina ^[2] ; Weinschutz, Luiz Carlos ^[3]

Affiliation

^[1] Univ Tartu, Dept Geol, Ravila 14A, EE-50411 Tartu - Estonia

^[2] Univ Estadual Campinas, Inst Geosci, Dept Geol & Nat Resources, BR-13083855 Campinas, SP - Brazil

^[3] UnC, CENPALEO, Av Pres Nereu Ramos 1071, BR-89300000 Mafra, SC - Brazil

• Document type: Journal article
• Source: CARNETS DE GEOLOGIE; v. 19, n. 19, p. 439-444, DEC 27 2019.
• Web of Science Citations: 0

Abstract

Lingulides from Lower Permian of Brazil (24% substrates) showed signs of bioerosion in form of multiple small shallow pits that resemble incomplete Oichnus paraboloides borings. A single lingulide valve showed a centrally located large circular predatory Oichnus simplex boring. Several lingulide shells (c. 21%) show small Arachnostega traces in their interior. The diameter of Arachnostega burrows is relatively constant. These burrows are more similar to juvenile stages of Arachnostega gastrochaena and do not form well-developed meshwork of tunnels. This is the first record of Arachnostega from the interior of lingulide shells and indicates that even very small lingulide shells were suitable substrates for cryptic organisms. (AU)

• FAPESP's process: 17/10956-5 - Taxonomy and fossildiagenetic analysis of Brazilian Paleozoic lingulides from Parnaíba and Paraná Basins
• Grantee: Carolina Zabini
• Support Opportunities: Regular Research Grants