Aegla lata Bond-Buckup & Buckup, 1994 (Decapoda: Anomura: Aeglidae): new occurrence and distribution map in the Paraná state, Brazil

Abstract

Our study presents a new occurrence and distribution record for Aegla lata in the state of Paraná, Brazil, specifically in the municipality of Rolândia. This finding, documented in October 2020 during the collection of benthic macroinvertebrates, highlights the crucial need for continuous monitoring and conservation efforts, especially in the face of evolving habitat changes in the region. Eight male specimens of A. lata were captured in a stream in Rolândia, expanding the known distribution area and providing valuable insights into the species' biology. Morphological identification, following established protocols, revealed distinctive features, including carapace measurements, variations in chelae, and specific anatomical characteristics. Notably, visible differences in chelae morphology were observed, aligning with previous studies on allometric growth in Aegla species. Despite the current non-threatened classification, A. lata deserves special attention due to its endemism in the Paranapanema River basin in Paraná, Brazil. The region, characterized by agricultural activities and ongoing deforestation, poses a significant threat to Aegla species, emphasizing the urgency of conservation measures. This discovery expands the known distribution area of A. lata to Rolândia, providing critical information for establishing effective conservation policies.