Search

The species included in the genus Epiophlebia Calvert, 1903 represent an exception within Recent lineages -- they do not belong to either dragonflies (Anisoptera) nor damselflies (Zygoptera). Nowadays, the genus is solely known from the Asian continent. Due to their stenoecious lifestyle, representatives of Epiophlebia are found in often very small relict populations in Nepal, Bhutan, India, Vietnam, China, North Korea, and Japan. We here present a taxonomic re-evaluation on the species status of Epiophlebia diana Carle, 2012, known from the Sichuan province in China, supplemented with a morphological character mapping on a genetic tree to highlight synapomorphies of E. diana and E. laidlawi Tillyard, 1921. We conclude that E. diana is a junior synonym of E. laidlawi. Furthermore, we discuss the Recent distribution of the group, allowing for predictions of new habitats of representatives of this group. [ABSTRACT FROM AUTHOR]

Bee lice (Braulidae) are small parasitic flies, which are adapted to live on their bee host. As such, the wingless Braula coeca is a parasite of the common honey bee Apis mellifera and it is well adapted to attach to its hairy surface. The attachment system of B. coeca provides a secure grip on the fine setae of the bee. This is crucial for the parasite survival, as detachment from the host is fatal for the bee louse. The feet morphology of B. coeca is well adapted to the challenging bee surface, notably by strongly broadened claws, which are split into a high number of comb‐like teeth, perfectly matching the diameter of the bee hairs. Based on microscopy observations, both the morphology and material composition of the tarsi of B. coeca are characterized in detail. Using high‐speed video analysis, we combine the morphology data on the attachment system with a behavioural context. Furthermore, we directly measured the attachment forces generated by the bee lice in contact with the host. In particular, the claws are involved in attachment to the host, as the interstices between the teeth‐like spines allow for the collection of several hairs and generate strong friction, when the hairs slip to the narrow gap between the spines. The overall morphology of the tarsus produces strong attachment, with average safety factors (force per body weight) around 1130, and stabilizes the tarsal chain with lateral stoppers against overflexion, but also allows for the fast detachment by the tarsal chain torsion. [ABSTRACT FROM AUTHOR]

We present accounts of vertebral anomalies in 17 individuals representing 13 species of anuran amphibians. These cases were detected while perusing a larger survey on the skeleton of frogs, for which µCT scans of a broad range of species were collected and evaluated. Our data and reports from the literature suggest that malformations, asymmetries, and irregularities, if present, appear to be particularly prevalent in the posterior region of the axial skeleton in frogs. Anomalies at the trunk-tail boundary, i.e., at the sacrum and neighbouring segments, were relatively common. Malformations at the trunk-tail boundary often include sacralization of pre- and postsacral elements with asymmetrically or symmetrically developed diapophyses, fusion with the posteriormost presacral vertebra, occurrence of postsacral vertebrae, unusual transverse processes at the proximal end of the urostyle, formation of additional zygapophyses, or fusion of elements that normally articulate. Vertebral fusion in the anterior vertebral column (Presacral Vertebrae I+II) has been reported both in evolutionary context and in cases of individual developmental anomalies. Malformations in the middle section of the vertebral column, such as the case of Epidalea calamita reported herein, are rare. [ABSTRACT FROM AUTHOR]