Volume 29, 2026
Intraspecific rather than interspecific drivers of female-limited polymorphism in Calopteryx splendens (Odonata: Calopterygidae)
Female-limited colour polymorphism is widespread in Odonata, particularly in the Coenagrionidae, where it is determined by simple Mendelian inheritance. In contrast, female-limited colour polymorphism in Calopterygidae is restricted to some populations of the Palaearctic Calopteryx splendens complex, whose males have blue-spotted wings and females occur either as gynochromes with transparent wings or as androchromes with dark brown-spotted wings.
Hetaerina giselae sp. n. (Odonata: Calopterygidae) from Southeastern Brazil, with larval and adult diagnosis
Hetaerina giselae sp. n. is described and illustrated based on specimens collected at Pico do Itambé State Park, Minas Gerais, Brazil. Integration of morphological and molecular data (COI) supports the recognition of the new species.
Description of Lyriothemis keralensis sp. n. (Odonata: Libellulidae) from the southwestern coast of India
A new species of dragonfly, Lyriothemis keralensis sp. n. is described from the coastal plains adjoining the Western Ghats of Kerala, southern India, based on a male holotype (IBC-CD161) and a female paratype (IBC-CD310) (type specimens are deposited in the Biodiversity Lab Research Collections, currently held at the National Centre for Biological Sciences, Bengaluru).
Larval competition does not affect the frequency of androchrome females but changes sex-ratio in Ischnura graellsii (Odonata: Coenagrionidae)
The maintenance of colour polymorphisms in natural populations is often explained by contrasting selective forces acting on the life cycle stage that shows the polymorphism. Nevertheless, in animals with complex life cycles, selection during the larval stage, which usually is the longest development phase and might accumulate 99% of overall mortality, could be a determinant force if the genes that affect adult colour have pleiotropic effects on larval phenotype.
Molecular insights into the diversity of odonates in the Andaman and Nicobar Islands using 16S rRNA gene
The Andaman and Nicobar Islands represent a unique biogeographic region characterized by high biodiversity and endemism, yet molecular studies on insect taxa, particularly Odonata remain limited. This study investigates the phylogenetic relationships and species boundaries among odonate taxa from the islands using mitochondrial 16S rRNA gene sequences.
Odonata (Insecta) survey in Atlantic Forest Conservation Units in southeastern Brazil: rare species and new records
The Atlantic Forest, one of the world’s most threatened biodiversity hotspots, is home to a rich diversity of Odonata, a group with great potential for further research in this phytophysiognomy. Considering this, the aim of this study was to update the data on Odonata species found in four conservation units of the Atlantic Forest biome in the states of São Paulo, Minas Gerais and Espírito Santo, highlighting their diversity and distribution.
Description of the female of Teinobasis fatakula Marinov & Donnelly, 2013 (Zygoptera: Coenagrionidae) from the Kingdom of Tonga
An expedition in 2024 to ‘Eau Island in the Kingdom of Tonga led to the collection of several female Teinobasis fatakula Marinov & Donnelly, 2013. Teinobasis fatakula is endemic to ‘Eua and can only be found inhabiting a single river in the ‘Eua National Park. Here we describe the female of this unique damselfly and expand its range.
Notes on Amazoneura, with description of A. submontana, a new species of damselfly from Peru (Odonata: Protoneuridae)
Amazoneura submontana sp. n. (holotype ♂: Peru, San Martín Región) is described and illustrated. Males of A. submontana can be distinguished from the other three known members of the genus by the shape of the cerci and absence of a dark ventral cross band behind the metacoxa in mature specimens.
