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The genus Guyanobius Spangler, 1986 is revised and expanded. Two species, Guyanobius queneyi sp. n. (French Guiana, Suriname) and Guyanobius lacuniventris sp. n. (Venezuela), are described as new and the two existing species, Guyanobius adocetus Spangler, 1986 and Guyanobius simmonsorum...
A peculiar population of Leuctra larvae with horn-shaped lateral protrusions on the head, similar to Leuctra signifera and herein named Leuctra cf. signifera, has been collected in the Eastern Carpathians. This species, at the larval stage, lacks ommatidia and shows on the two horn-shaped...
Campsurus major, C. argentinus and C. amapaensis sp. nov. form a monophyletic group supported by the following apomorphies in the male genitalia: robust pedestals with a widely rounded inner-posterior margin and a more acute and thinner outer margin, penes strongly sclerotised and curved...
In northwest and western Europe the blackfly subgenus Eusimulium (Diptera: Simuliidae: Simulium) is represented by four species of which three are widely distributed and one, Simulium petricolum, was previously thought to be largely restricted to the Mediterranean region. Simulium petricolum is...
Rhagovelia pediformis sp. n. is described from western Colombia and placed in the R. elegans group.
The Protohermes davidi group is a peculiar species group in the dobsonfly genus Protohermes, distinguished by the generally immaculate wings and the unique male genitalia with the flattened, posteriorly tapered tenth tergum. Three species are herein newly placed into this species group. Hereby,...
Phylloicus Müller, 1880 and Banyallarga Navás, 1916 are endemic Neotropical genera of Calamoceratidae. Currently, Phylloicus has 55 extant species, 19 of which are recorded from Brazil, and a fossil species from Dominican amber. In this paper, a new species of Phylloicus is described and...
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