The final stadium larva of Philoganga vetusta Ris is described and illustrated in detail. The larva of supposed P. vetusta from Hong Kong is confirmed, and that of Philoganga sp. from Fujian can be determined to be P. robusta. The taxonomic characters and systematic status of the larvae of genus Philoganga are discussed and summarized….
The finnal stadium larva of Periaeschna zhangzhouensis Xu is described and illustrated for the first time. The taxonomic characters of the larvae of the genus Periaeschna Martin are discussed and summarized.
The final stadium larva of Leptogomphus elegans Lieftinck is described and illustrated for the first time. The taxonomic characters of the larvae of the genus Leptogomphus Selys are discussed and summarized.
The taxonomy of Chlorocypha species is problematic due to variability and the paucity of morphological characters. Subspecies radix of C. glauca is raised to specific rank. C. sharpae is found to be a synonym of C. luminosa. The synonymy of C. jejuna with C. luminosa is rejected. The former species is similar to the Southern…
In recent decades, a lack of available knowledge about the magnitude, identity and distribution of biodiversity has given way to a taxonomic impediment where species are not being described as fast as the rate of extinction. Using Machine Learning methods based on seven different algorithms (LR, CART, KNN, GNB, LDA, SVM and RFC) we have created an automatic identification approach for odonate genera, through images of wing contours.
Vestalis gracilis (Rambur, 1842) is a forest stream damselfly belonging to the family Calopterygidae. Its last-stadium larvae and exuviae are described and illustrated based on laboratory-raised specimens from Thailand, and observations of agonistic behavior are provided. The taxonomical characters of V. gracilis larvae are similar to those of V. amoena.
Epiophlebia is the only known taxon of Odonata that is neither part of the damselflies (Zygoptera) nor dragonflies (Anisoptera). Previously, two species of Epiophlebia were recognized, restricted to areas in Japan (Epiophlebia superstes) and the Himalayas (Epiophlebia laidlawi). Recently, the group gained attention with the description of new species from China – Epiophlebia sinensis and Epiophlebia…
The final instar larva of Heliaeschna idae Brauer is described and figured for the first time based on the exuvia from an advanced female larva collected in Sarawak, Borneo (East Malaysia). It is compared with the known larvae of the genus and is concluded to be most closely allied to Heliaeschna simplicia Karsch, with which…
The taxonomy of the Gynacantha and Heliaeschna species from continental Africa is problematic, and available keys are unsatisfactory. ‘Traditional’ characters such as venation and ‘innovative’ ones like abdominal denticulation are evaluated and their variability is measured and discussed. G. quadrina is a synonym of G. africana and not of G. vesiculata, G. ochraceipes is regarded…
The morphology of the last stadium larvae of the African Coryphagrion grandis is described for the first time, based on one exuvia and three last instar larvae from Kenya. Taxonomically important morphological characters are illustrated and discussed. Important characters are the shape of the larval caudal appendages, the labial palpi and the branched setae on…