Morphological and molecular data on Phyllodistomum (Digenea: Gorgoderidae) from Brazil, with the description of a new species parasitizing Hoplias malabaricus (Bloch, 1794) (Osteichthyes, Erythrinidae)

Author(s)

Dias, K. G. A. ; de Leon, G. Perez-Ponce ; da Silva, R. J. ; Vieira, D. H. M. D. ; Leite, L. A. R. ; de Azevedo, R. K. ; Abdallah, V. D.

• Document type: Journal article
• Source: JOURNAL OF HELMINTHOLOGY; v. 97, p. 11-pg., 2023-08-24.

Abstract

Phyllodistomum pepirense n. sp. is described from the urinary bladder of Hoplias malabaricus (Bloch, 1794), sampled in the Jacare-Pepira River in Sao Paulo state, Brazil. The isolates of the new species were recovered as a monophyletic group in the phylogenetic analysis of the 28S rRNA gene, which showed the new species as the sister taxa of Phyllodistomum virmantasi Pinacho-Pinacho, Sereno-Uribe, Hernandez-Orts, Garcia-Varela & Perez-Ponce de Leon, 2021, a species sampled from an eleotrid fish in Southeastern Mexico. The new species differs morphologically from P. virmantasi by having a larger body size, slightly lobed testes and ovary, a mostly intercaecal uterus, slightly diverticulated caeca, and vitelline masses irregularly shaped. The new species is also readily distinguished from other species of Phyllodistomum Braun, 1899 reported from freshwater fishes in Brazil - namely, P. rhamdiae Amato & Amato, 1993 and P. spatula Odhner, 1902. The new species is herein described based on morphological characteristics, molecular data from D1-D3 domains of the 28S rRNA gene, host association, and geographical distribution. (AU)

• FAPESP's process: 17/00566-5 - Fish parasites as bioindicators of heavy metal accumulation in the Jacaré-Pepira and Jacaré-Guaçú rivers, Tietê-Jacaré River Basin, State of São Paulo, Brazil
• Grantee: Lucas Aparecido Rosa Leite
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 20/05412-9 - Diversity, taxonomy and systematic of fish parasites from Pardo River, Middle Paranapanema River, São Paulo State
• Grantee: Reinaldo José da Silva
• Support Opportunities: BIOTA-FAPESP Program - Regular Research Grants
• FAPESP's process: 19/25223-9 - Knowledge of fish parasitic fauna and its use in the water resource management and environmental impact process
• Grantee: Reinaldo José da Silva
• Support Opportunities: Regular Research Grants