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Abstract
In this study, the morphology, distribution and ecology of Eupelops curtipilus (Berlese, 1916) and E. plicatus (C. L. Koch, 1835) are investigated and morphological characters of Eupelops Ewing, 1917 are discussed. The juveniles of these species have plicate integument and a dorsoventrally flattened hysterosoma, with short and thin setae c1, c3 and of d-series on the gastronotum, which is typical of Phenopelopidae, whereas the length of marginal gastronotal setae differs in these species. Eupelops curtipilus has these setae short, except for a long and thick posterior seta h1 in the larva and h3 in the nymphs, whereas Eupelops plicatus has them longer and thicker, especially setae lp and h1 in the larva and h3 in the nymphs. The adults of E. curtipilus and E. plicatus have long, phylliform seta in, 10 pairs of notogastral setae, including three pairs of p-series, and three pairs of adanal setae, which are typical of Eupelops, but differ by the length and location of some notogastral setae. Eupelops curtipilus has all these setae short, including h1, whereas E. plicatus has them longer, especially h1. The former species has setae lp and h3 inserted close to each other, with porose area A1 between them, whereas the latter species has setae lp and h3 separated and A1 at the insertion of seta lp. The adults of both species have ventrodistal apophysis on genu I, which may have generic value. The juveniles and adult of E. plicatus have more long and thick setae on the leg segments than those of E. curtipilus. Eupelops curtipilus is considered a Palaearctic species, whereas E. plicatus is Holarctic.
Acknowledgements
We thank the anonymous reviewers for a thorough review of this manuscript and all professional suggestions that considerably improved the scientific value of this article.