Annales Zoologici Fennici
Research on animals since 1964.

Annales Zoologici Fennici volume 63 (2026)

Pinedo-Garcia R.B., Hamada N., Benetti C.J. & do Nascimento J.M.C. 2026: New morphological information on Hintonelmis sloanei Hinton, 1971 (Coleoptera : Elmidae). — Ann. Zool. Fennici 63: 39–48. | EPUB

Abstract In this paper, we present new morphological information on both male and female Hintonelmis sloanei Hinton, 1971, including additional details and illustrations of external and internal structures. Hintonelmis sloanei can be distinguished from all other species of the genus by the following combination of characteristics: pronotum with two incomplete dark-brown longitudinal stripes that diverge slightly toward the lateral margins from the anterior margin, and with two sinuous and elongated sublateral carinae at its base; elytra with two dark-brown longitudinal stripes along the elytral suture; intervals VII and VIII with narrow well-defined dark-brown longitudinal stripes that run parallel to the lateral margin and are continuous from the basal to the apical region. Additionally, the species is readily recognised by the male genitalia, characterised by a tubular, elongated fibula that is shorter than the penis; rod-shaped corona; ovipositor with the valvifer expanded on the posterior one-third and the apical coxite 3.8 times longer than wide. These morphological data will contribute to future phylogenetic studies within the genus.

Souza K.O., Sarmento F.R.P., Avelino-Capistrano F. & Dumas L.L. 2026: Checklist of Gripopterygidae (Insecta : Plecoptera) and a new species, Tupiperla nessimiani, from Reserva Biológica de Araras, Rio de Janeiro State, Brazil. — Ann. Zool. Fennici 63: 21–37. | EPUB

Abstract Gripopterygidae comprises about 60 species in Brazil, most of which inhabit mountainous streams along the Atlantic coast. The genus Tupiperla includes 26 species, mainly occurring in mountainous streams of the Atlantic Forest. We present a checklist of Gripopterygidae from the Araras Biological Reserve (REBIO Araras), Rio de Janeiro State, Brazil. We documented 15 species representing four genera. Three species are reported from Rio de Janeiro for the first time: Paragripopteryx blanda, P. delicata and P. intervalensis. Additionally, a new species, Tupiperla nessimiani, is described and illustrated based on male specimens collected in REBIO Araras. Tupiperla nessimiani is distinguished by the narrow extension of tergum 10 with divergent margins and a shallow apical incision, and by the elongate, rod-like paraprocts, bearing a dark, thorn-like subapical spine. This study contributes to reducing Linnean and Wallacean shortfalls in Brazilian Gripopterygidae.

Patsyuk M. 2026: Diversity and distribution of naked amoebae in different types of water bodies in Ukraine — Ann. Zool. Fennici 63: 1–20, doi.org/10.5735/086.063.0101. | EPUB

Abstract Forty-four species of naked amoebae were identified across different types of water bodies in Ukraine. The highest number of species was recorded in rivers (44 species), while the lowest was found in swamps (15 species); 27 species were found in floodplains and 23 species in lakes. Based on cluster analysis, two distinct species complexes were identified: one for swamps and another encompassing lakes, floodplains and rivers. The specificity of the species complexes of naked amoebae was determined by abiotic factors of the aquatic environment, such as water temperature, dissolved oxygen concentrations and organic substances in water, analysed using the permanganate oxidation method. According to the Chekanovsky–Sørensen index of similarity, a high degree of similarity was observed between the studied water bodies. In freshwater bodies, species of naked amoebae are unevenly distributed and form species complexes differentiated by key environmental factors.