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A global synonymical checklist of the species and higher taxa of the insect order Megaloptera is provided. The checklist includes both extant and extinct taxa, and recognizes 2 families, 4 subfamilies, 48 genera, 425 species, and 6 subspecies. Both families (Corydalidae and Sialidae), and three of the four subfamilies (Corydalinae, Chauliodinae, and Sialinae) are known from both extant and extinct species; the Sharasialinae (Sialidae) is entirely extinct. Country-level geographic distribution data are provided for all species and subspecies. Synoptic type data are provided for taxa in the family and genus groups. Summary data are given for the numbers of megalopteran species currently known to occur in each of the major biogeographical regions of the world, and for the world fauna. Increase of knowledge about the diversity of the world Megaloptera fauna is summarized in counts of valid species described per decade and in a global taxonomic description curve. An updated set of keys to the world families, subfamilies, and genera of the Megaloptera is also provided.
A new species of the myrmeleontine antlion genus Baliga Navás, 1912 (Neuroptera: Myrmeleontidae), Baliga kashmirensis sp. nov., from Azad Kashmir and Khyber Pakhtunkhwa Province of Pakistan is described and illustrated, representing the first record of Baliga from Pakistan. Three species of Myrmeleon Linnaeus, 1767 are re-described: M. hyalinus hyalinus Olivier, 1811, M. tenuipennis Rambur, 1842, and M. trivialis Gerstaecker, 1885. Myrmeleon bimaculatus Yang, 1999 syn. nov. originally described from China is considered to be a junior synonym of Myrmeleon tenuipennis Rambur, 1842. In addition, an annotated catalogue of all species of Myrmeleon known from Pakistan along with their distribution map, taxonomical notes and updated identification key to known genera and species are provided.