Species of the genus Helopelius Reitter, 1922 (type species Stenomax aeneipennis Allard, 1876) were known from Rhodes and North Africa. We found that two species described from Rhodes belong to the genus Stenohelops Reitter, 1922, and Helopelius can be interpreted as a subgenus within latter, guided by the article 23.2 of ICZN. The following synonyms are proposed Helopelius, stat. n. (from genus to subgenus) = Stenomaleis Español, 1957, syn. n.; Stenohelops Reitter, 1922 = Gunarellus Reitter, 1922, syn. n.; Stenohelops (Helopelius) aeneipennis (Allard, 1876) = Helopelius disgregus Reitter, 1922, syn. n., = Gunarus gayirbegi Nabozhenko Keskin, 2009, syn. n. As a result, the following species are transferred from the former genus Helopelius to the genus Stenohelops Stenohelops (Helopelius) nodifer (Kraatz, 1880), comb. n.; Stenohelops (Helopelius) otini (Antoine, 1949), comb. n.; Stenohelops (Helopelius) subsinuatus (Antoine, 1951), comb. n.; Stenohelops (Helopelius) verrucosus (Vauloger de Beaupré, 1900), comb. n.; Stenohelops (Helopelius) zaianus (Antoine, 1949), comb. n. Thus, the subgenus Helopelius contains 11 species from three isolated geographical exclaves Western Mediterranean, Eastern Mediterranean and China. Lectotypes of Stenomax aeneipennis Allard, 1876, Helops gratus J. Frivaldszky, 1894 and Cylindrinotus (Helopelius) disgregus Reitter, 1922 are designated. Data on fossil species of the genus and the allied extinct taxa, as well as on bionomics of extant species of the subgenus Helopelius are presented. The check-list for extant and extinct species of Stenohelops is given.A new species of Bithoracochaeta Stein, 1911 (Diptera, Muscidae), Bithoracochaeta couriae sp. nov., is described and illustrated. In addition, we present comments on all Mexican species of the genus, a brief description of hunting behavior of B. couriae sp. nov. and its possible use as a biological control agent of greenhouses pests.A new species of Nazeris Fauvel, 1873 from Anhui, China, is described and illustrated N. yaoluopingus, sp. n. Additional records of N. cultellatus Assing, 2013, an identification key to the Nazeris species in Anhui and a map showing their distribution are provided.The Neotropical genus Epigomphus Hagen in Selys, 1854 groups 31 species distributed from Mexico to northern Argentina. Only two species have been recorded so far from Colombia. Here we present two new species found in the north of the Andean Colombian Cordillera Central, Epigomphus rufus sp. nov. and Epigomphus brillantina sp. nov. Full descriptions of adult male and female and adult male respectively, plus diagnoses, pictures of the diagnostic characteristics, natural history notes, and a distribution map are provided.No central online repository exists for the collection of animal images; hence it remains unclear how extensively species have been illustrated in the published literature or online. Here we compiled a list of more than 8000 reptile species (out of 11,341) that have photos in one of six popular online repositories, namely iNaturalist (6,349 species), the Reptile Database (5,144), Flickr (4,386), CalPhotos (3,071), Wikimedia (2,952), and Herpmapper (2,571). These sites have compiled over one million reptile photos, with some species represented by tens of thousands of images. Despite the number of images, many species have only one or a few images. This suggests that a considerable fraction of morphological and geographic variation is under documented or difficult to access. We highlight prominent gaps in amphisbaenians, lizards, and snakes, with geographic hotspots for species without images in Central Africa, Pacific Islands, and the Andes Mountains. We present a list of ~3,000 species without photos in any of the six databases and ask the community to fill the gaps by depositing images on one of these sites (preferably with minimal copyright restrictions).The genus Triaenogryllacris is redescribed and a key for identification of the species is provided. When dealing with observations of iNaturalist, accurate data about the distribution of T.  https://www.selleckchem.com/products/gsk484-hcl.html  triaena (the type species) are obtained, and three color forms are indicated yellow, pink and green. Two new species are described here T. diaena n. sp. and T. horaciotrianai n. sp., expanding the expected geographic distribution for the genus, thus recorded, from the Andean forests of Ecuador and Colombia's three mountain ranges. Finally, the characters and distribution of Triaenogryllacris are discussed, contrasting with the other taxa described for the family Gryllacrididae.Eupitheciini is a diverse cosmopolitan tribe of larentiine moths. The structure and musculature of the male terminalia were described in six Palaearctic and Indo-Australian eupitheciine species from the genera Eupithecia Curtis, Gymnoscelis Mabille, and Pasiphila Meyrick (Lepidoptera Geometridae Larentiinae). The tergal flexors of the valvae, muscles m4, running to the medial part of the transtilla or to the membrane dorsad of the transtilla are identified as a potential synapomorphy for the tribe Eupitheciini. The tergal extensors of the valvae, muscles m3(2), running deep into the costa valvae is a possible synapomorphy for the genus Gymnoscelis. The genus Pasiphila does not share all eupitheciine characters, with the tergal flexors of the valvae, muscles m4, extending from the dorsal parts of the vinculum. The Eupithecia haworthiata species-group differs from other species-groups by the shape of the uncus and the sternal extensors of the valvae, muscles m8(3), with lateral fibres longer than the medial ones.A new species of the genus Cryptotendipes Beck et Beck is described on the basis of adult male. It is the third species from India and ninth from the Oriental region. The Chinese species, C. nodus Yan, Tang et Wang, 2005 is recorded firstly from India. The molecular barcoding of two species, Cryptotendipes disparilis Pal et Hazra, 2018 and C. nodus is provided. Additional information and revision of two Indian species Cryptotendipes aculeatus Pal et Hazra, 2018 and C. disparilis Pal et Hazra, 2018 are furnished for erroneous description. A tentative cladistic relationship based on the morphological data of adult males and a revised world key to the adult males of the genus Cryptotendipes are also provided.