A New Scallop Species, Syncyclonema goyi sp. nov. (Bivalvia, Pectinida, Entoliidae), from the Upper Cenomanian of West Portugal
A new species of pectinid bivalve, Syncyclonema goyi sp. nov., is described in honour of Professor Antonio Goy, one of the leading stratigraphers who shaped Mesozoic studies in Iberia over the past half century. It represents one of the smaller fossil scallops currently known from the Upper Cretaceous of Europe, alongside a few boreal species previously assigned to the family Entoliidae. The type specimens have orbicular valves, almost smooth, with unequal auricles. The right valve is more convex and bears a well-marked paleal sinus. The sculpture of the shell is weak, exhibiting concentric growth lines and lamellae. However, nearly 90 very small, uniform radial striae are discernible beneath the outer shell layer. This species is frequent in open marine, fine-grained, inner shelf facies of the Tethyan West Portuguese Carbonate Platform, near the main localities of Coimbra, Tentúgal, and Condeixa-a-Nova, in the Baixo Mondego region of West Portugal. It mostly occurs in the upper Cenomanian beds of the Trouxemil Formation, with Euomphaloceras septemseriatum and Vascoceratidae ammonites.
Authors
- Senay Ozkaya de Juanas (ORCID: https://orcid.org/0000-0001-7668-9156)
- Mário Miguel Mendes (ORCID: https://orcid.org/0000-0002-5470-5634)
- Mélani Berrocal-Casero (ORCID: https://orcid.org/0000-0002-7215-213X)
- Manuel Segura (ORCID: https://orcid.org/0000-0002-1802-4073)
- Jordi Pérez-Cano (ORCID: https://orcid.org/0000-0002-1782-5346)
- Ricardo Pimentel (ORCID: https://orcid.org/0000-0003-0719-4664)
- Fernando Barroso-Barcenilla (ORCID: https://orcid.org/0000-0002-7938-7230)
- Fernando Carlos Lopes (ORCID: https://orcid.org/0000-0002-3374-9857)
- Rúben Domingos (ORCID: https://orcid.org/0000-0002-0373-9869)
- Elsa T. Gomes
- José Manuel Brandão
- Hélder José Pereira
- Maria José Comas-Rengifo
- Vanda Faria dos Santos
- Pedro Miguel Callapez
Institutions
- Universidad Complutense de Madrid (ES)
- University of Lisbon (PT)
- Fernando Pessoa University (PT)
- Universidad de Alcalá (ES)
- IdMind (Portugal) (PT)
- Centre for Research in Anthropology (PT)
- Universitat de Barcelona (ES)
- University of Coimbra (PT)
- Universidade Nova de Lisboa (PT)
Publication Details
- Journal
- Geosciences
- Published
- 2026-02-24
- DOI
- https://doi.org/10.3390/geosciences16030094
- Primary Topic
- Paleontology and Stratigraphy of Fossils
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- Universidade de Coimbra
- Fundação para a Ciência e a Tecnologia
- European Regional Development Fund