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Acta Entomologica Musei Nationalis Pragae

Volume 60 - Number 2
published on: 17th June 2020
60 (2)
Hájek Jiří, Ivie Michael A., Lawrence John F.Binhon atrum Pic – a junior synonym of Plastocerus thoracicus, with nomenclatural notes on Plastocerus (Coleoptera: Elateridae: Plastocerinae)Acta Entomologica Musei Nationalis Pragae 60(2): 391-396
Abstract: //Binhon atrum// Pic, 1922, an enigmatic genus and species described in the family Dascillidae based on a single female from Vietnam, is illustrated, diagnosed and formally synonymised with //Plastocerus thoracicus// Fleutiaux, 1918 (Elateridae: Plastocerinae). The species is recorded from China (Guangxi, Yunnan) for the first time. The taxonomic history of the genus //Plastocerus// Schaum, 1852 (not //Plastocerus// LeConte, 1853) with emphasis on its synonyms, is briefly summarised.Published online: 17th June 2020
Lackner TomášA review of Gnathoncus of Southeast Asia (Coleoptera: Histeridae: Saprininae)Acta Entomologica Musei Nationalis Pragae 60(2): 397-409
Abstract: Six species of the genus //Gnathoncus// Jacquelin du Val, 1857 occur in the region of Southeast Asia: //G. brevisternus// Lewis, 1907, //G. semimarginatus// Bickhardt, 1920, //G. viet­namicus// Kryzhanovskij, 1972, //G. rotundatus// (Kugelann, 1792), //G. nannetensis// (Marseul, 1862), and the newly described //G. sechuanus// sp. nov. (China: Sichuan). Two rare species, //G. brevisternus// and //G. semimarginatus//, are redescribed; all species are figured and keyed. The lectotype of //Gnathoncus brevisternus// is designated and the species is newly reported from Vietnam and Nepal.Published online: 19th June 2020
Nabozhenko Maxim, Keskin Bekir, Papadopoulou AnnaTwo new species and new records of darkling beetles of the tribe Helopini from Turkey and Cyprus (Coleoptera: Tenebrionidae)Acta Entomologica Musei Nationalis Pragae 60(2): 411-417
Abstract: Two new species of the tribe Helopini (Coleoptera: Tenebrionidae) are described from Turkey: //Nalassus// (//Nalassus//) //becvari// sp. nov. (Elazığ Province) and //Hedyphanes// (//Hedyphanes//) //kmenti// sp. nov. (Artvin Province). The first species is characterized by strongly thickened antennomeres 2–8 and differs from all Turkish //Nalassus// s. str. Mulsant, 1854 in the ventral aspect of eye, which bears a weak posterior ventral impression (rather than a distinct groove of other species). The second species belongs to the species group with asperate punctation of the prothoracic hypomera and differs from all //Hedyphanes// Fischer von Waldheim, 1820 in the presence of suberect pubescence on both sides of elytral base. Distribution of some Helopini (the //Helops// genus-group, subtribe Helopina) from Anatolia and Cyprus is updated with new data. //Hedyphanes mannerheimi// Faldermann, 1837 is recorded for Turkey (Iğdır Province) for the first time. //Helops caeruleus caeruleus //Linnaeus, 1758 from Pervolia is a new record for Cyprus and the occurrence is probably a result of anthropogenic introduction.Published online: 25th June 2020
Zettel Herbert, Laciny AliceRhagovelia species from Nosy Boraha east of Madagascar (Hemiptera: Heteroptera: Veliidae)Acta Entomologica Musei Nationalis Pragae 60(2): 419-425
Abstract: In the years 1992 and 1993, the Austrian entomologist Michael Madl collected semiaquatic Hemiptera on Nosy Boraha (Île Sainte Marie), a small island near the north-eastern coast of Madagascar. The collected material contains five species of //Rhagovelia// Mayr, 1865, two of which are new to science. Both //Rhagovelia madli// sp. nov. and //Rhagovelia kalalaoensis// sp. nov. belong to the //R. tesari// species group. The other three species reported from the island are //R. madari// Hoberlandt, 1941, //R. reuteri// Hoberlandt, 1951, and //R. tesari// Hoberlandt, 1941.Published online: 6th July 2020
Kakizoe Showtaro, Liang Wei-Ren, Myint Khin Mar, Maruyama MunetoshiTermitotrox icarus sp. nov. (Coleoptera: Scarabaeidae): a new termitophilous beetle from Myanmar with observations of carrying behavior by host termitesActa Entomologica Musei Nationalis Pragae 60(2): 427-436
Abstract: A new species of scarab beetle, //Termitotrox icarus// sp. nov., is described from central Myanmar, being the third representative of the genus //Termitotrox// Reichensperger, 1915 from the Indo-Chinese Subregion of the Oriental Region. The majority of the type series was collected from the walls of fungus garden chambers built in the nests of the termite //Odontotermes proformosanus// Ahmad, 1965. //Termitotrox icarus// sp. nov. can be easily distinguished from the known //Termitotrox// as it possesses wing-shaped trichomes on the elytra, the more elongate habitus shape in dorsal view, the basomedian section of pronotum not protruding backwards, a pair of distinct costae on the pronotal basomedian section strongly developed, a median costa on anterior pronotal margin strongly developed, the elytral striae narrower than interstriae, the lack of trichomes at the base of elytral sutural stria, and a mid-range body length of 1.5–1.9 mm. The ‘carrying behavior’ by the host termites is reported for the first time for //Termitotrox// and a strategy for the dispersal of flightless termitophilous scarabs is hypothesized. Published online: 28th July 2020
Short Andrew E. Z., Benetti Cesar J., Gustafson Grey T.New records of Platynectes (s. str.) diving beetles from South America with description of two new species (Coleoptera: Dytiscidae: Agabinae)Acta Entomologica Musei Nationalis Pragae 60(2): 437-447
Abstract: Diving beetles in the genus //Platynectes// (s. str.) in South America are relatively large and charismatically colored, yet relatively rare in museum collections. Recent fieldwork in northern and central South America has resulted in the collection of hundreds of new specimens that substantially expand our distributional knowledge of the genus. Here, we provide new distributional records for //Platynectes decemnotatus// (Aubé, 1838), //P. garciai// Gustafson, Short & Miller, 2016, //P. submaculatus// (Laporte, 1835), and //P. tafelbergensis// Gustafson, Short & Miller, 2016. In addition, two new species were identified and described herein: //Platynectes bicolor// sp. nov. of the //P. ornatifrons// species group from Brazil (Goiás and Mato Grosso do Sul), and //P. colombicus// sp. nov. of the //P. submaculatus// species group from the Guiana Shield region of eastern Colombia. These new records suggest that Platynectes (s. str.) is likely widespread across the Brazilian and Guiana Shield regions of the continent, and that some individual species have substantial range sizes of nearly 2000 km. An updated key to the species groups of Neotropical //Platynectes// (s. str.) and to the species of //P. submaculatus// species group are provided.Published online: 28th July 2020
Kato Daichi, Nakamura Takeyuki, Tachi TakujiTaxonomic study of the genus Epiphragma of Japan (Diptera: Limoniidae)Acta Entomologica Musei Nationalis Pragae 60(2): 449-461
Abstract: Japanese species of the genus //Epiphragma// Osten Sacken, 1860 are revised. //Epiphragma amamiense// sp. nov. is described, and //E. gracilistylus// Alexander, 1933 and //E. kempi// Brunetti, 1913 are recorded from Japan for the first time. It is revealed that records of //E. evanescens// Alexander, 1940 from Japan were based on misidentifications of //E. gracilistylus// and //E. trichomerum// Alexander, 1955. Therefore, a total of six species are recognized from Japan, and the previous records which based on misidentifications are corrected. Male and female terminalia of these six species are illustrated and a key to these species is provided.Published online: 1st August 2020
Kaplin Vladimir, Martynov VladimirThree new species of bristletails of the families Meinertellidae and Machilidae (Archaeognatha) from Ukraine and Southern RussiaActa Entomologica Musei Nationalis Pragae 60(2): 463-474
Abstract: Two new species of Machilinus Silvestri, 1905 (M. petrophilus Kaplin, sp. nov., M. obscurus Kaplin, sp. nov.) from Ukraine and one new species of Charimachilis Wygodzinsky, 1939 (C. rostoviensis Kaplin sp. nov.) from Southern Russia are described. The new species of Machilinus belong to the subgenus Machilinus s. str. with 1 + 1 eversible vesicles on urocoxites II–VII, and urostyli with apical spines; to the group “rupestris” with 2nd and 3rd articles of male maxillary palpus without ventral spines (M. obscurus sp. nov.), and with spines on these articles (M. petrophilus sp. nov.). Machilinus petrophilus sp. nov. differs from M. rocai Bach, 1975 in the color and ratio of length to width of compound eyes, the presence of numerous short chaetae on the clypeus, the structure of the lateral apophysis on the 2nd article of the male maxillary palpus, and the number of ventral spines on the legs. Machilinus obscurus sp. nov. differs from the other species of the group “rupestris” in the color of compound eyes, the presence of numerous short chaetae on the male frons and clypeus, and in other features. Charimachilis rostoviensis sp. nov. (Machilidae) most closely resembles C. ukrainensis Stach, 1958. Charimachilis rostoviensis sp. nov. differs from C. ukrainensis in the shape of posterior angle of urosternites, and ratios of lengths of urostyli and urocoxites.Published online: 5th August 2020