TL;DR: It is argued for conserving the family-group names Chlorocyphidae, Euphaeidae and Dicteriadidae, as well as retaining Epiophlebiidae in the suborder Anisozygoptera, while the proposal to separate Chlorogomph Families, Cordulegastridae and Neopetaliidae from Libelluloidea in their own superfamily CordUlegastroidea is adopted.
Abstract: An updated classification and numbers of described genera and species (until 2010) are provided up to family level. We argue for conserving the family-group names Chlorocyphidae, Euphaeidae and Dicteriadidae, as well as retaining Epiophlebiidae in the suborder Anisozygoptera. Pseudostigmatidae and New World Protoneuridae are sunk in Coenagrionidae and Old World Protoneuridae in Platycnemididae. The families Amphipterygidae and Megapodagrionidae as traditionally recognized are not monophyletic, as may be the superfamily Calopterygoidea. The proposal to separate Chlorogomphidae, Cordulegastridae and Neopetaliidae from Libelluloidea in their own superfamily Cordulegastroidea is adopted. Macromiidae, Libellulidae and Synthemistidae and a restricted Corduliidae are accepted as families, but many genera of Libelluloidea are retained as incertae sedis at present. 5952 extant species in 652 genera have been described up to 2010. These are placed here in 30 families; recent proposals to separate additional families from Amphipterygidae and Megapodagrionidae have not yet been incorporated.
TL;DR: Two new species of dragonflies are described from the Weald Clay of the English Weald and a new phylogenetic analysis of the ‘difficult’ superfamily Libelluloidea is attempted, but the consensus tree suggests an unresolved trichotomy of included families and subfamilies.
TL;DR: A key to the families and genera of ultimate stadium larvae of Libelluloidea is presented, including Libellulidae, with 40 genera with known larvae, all remaining genera larva are known.
Abstract: Libelluloidea is the second most diverse and speciose group of Odonata just behind the Coenagrionoidea. It includes almost 1,500 species in 195 genera, of which approximately 450 species and 58 genera are represented in the Neotropical region. The Libelluloidea have a cosmopolitan distribution and are present in all kind of environments. The monophyly of the superfamily is strongly supported but inner arrangement is still unresolved. In this work, four families are acknowledged: Synthemistidae (one genus in the Neotropical region: Gomphomacromia); Macromiidae (a broad genus not considered geneally neotropical but present in northern Mexico: Macromia); Corduliidae (sensu stricto with six genera in the Neotropical region, but including also here for practical reasons the probable closely related incertae sedis Lauromacromia and Neocordulia), and Libellulidae (48 genera in the Neotropical region). Except for Libellulidae, with 40 genera with known larvae, all remaining genera larva are known. Here, we present a key to the families and genera of ultimate stadium larvae of Libelluloidea.
TL;DR: This study provides a well-substantiated phylogeny of the Libelluloidea generated from gene fragments of two independent genes, the 16S and 28S ribosomal RNA (rRNA), and using models that take into account non-independence of correlated rRNA sites.