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Berlin, Germany

Agabus puetzi sp. n. is described from the eastern part of the Qinghai-Tibet Plateau (Sichuan). It is a very distinctive spe-cies, males of which can be identified easily even in the field because the inner outline of the protibiae is distinctly curved, a feature which is unknown or considerably less prominent in any other Agabus Leach, 1817. The new species undoubt-edly belongs to the subgenus Acatodes Thomson, 1859, although males lack the preapical spine of the median lobe, a char-acter which is also seen in the Nearctic Agabus audeni Wallis, 1933, and the Holarctic Agabus inexspectatus Nilsson, 1990. Due to an unusual combination of external characters (e.g., double reticulation, shape of tibiae and of pro- and metasternal processes) it is not easy to assign the species to one of the known species groups of the subgenus. It seems likely, however, that it belongs to the confinis-group because several other characters are shared with most members of this group. A few features suggest a closer relationship to Agabus thomsoni (J. Sahlberg, 1871) and Agabus zetterstedti Thomson, 1856. The new species raises the number of members of the confinis-group to 36, seven of which occur in China. A list of all Afrotropical and Palearctic members of this group is given and their median lobes are figured in lateral view. The lectotype of Agabus turcmenus Guignot, 1957 is designated, and its habitus and aedeagus are illustrated for the first time. Some notes on the distribution and external morphology of A. inexspectatus are included. Source

Fery H.,Rauschstr. 73 | Przewozny M.,Adam Mickiewicz University
Zootaxa | Year: 2011

Ilybius thynias sp. n. is a new member of the Ilybius chalconatus-group and belongs to the subgroup of the same name. It was collected in the European part of Turkey, not far from the western coast of the Black Sea, some kilometres west of I?neada and somewhat south of the border with Bulgaria. The species is externally similar to the other members of that subgroup, but males deviate considerably by the shape of the median lobe and the parameres. A detailed description and several figures are given to facilitate an easy identification of the new species. In addition, we have modified the key to species for males of the chalconatus- and erichsoni-groups given in Fery & Nilsson (1993) by including the new species and the similar, only recently described, I. adygheanus Petrov, Shapovalov & Fery, 2010. The genus Ilybius Erichson, 1832 contains now 70 members, 21 of which belong to the chalconatus-group which includes the chalconatus-subgroup with eight species. A synopsis of the chalconatus-group is presented. Copyright © 2011 Magnolia Press. Source

Millan A.,University of Murcia | Picazo F.,University of Murcia | Fery H.,Rauschstr. 73 | Moreno J.L.,Centro Regional Of Estudios Del Agua Crea | And 2 more authors.
Zootaxa | Year: 2013

Stictonectes abellani sp. n. is described from the Iberian Peninsula. On average, the new species is larger and the colouration of the upper surface darker than in most other species of the genus. Seemingly the species has been confounded with others in the past, particularly S. optatus (Seidlitz, 1887). Males can be separated from externally similar species by studying the shape of the parameres. Additionally, the anterior margin of the clypeus is provided with a distinct rim in both sexes, which is absent or only weakly present in other species. The habitus and the male genitalia of the new species are illustrated, and compared with those of S. optatus. External morphological differences from other members of the genus are discussed. According to studies of the molecular phylogeny, based on fragments of four mitochondrial genes, S. abellani sp. n. is clearly separated from previously described species of Stictonectes Brinck, 1943, apparently being relatively basal within the genus. The new species is rather widely distributed in the south-western part of the Iberian Peninsula, inhabiting pools in small temporary siliceous streams. We provide distributional maps for all eight Iberian Stictonectes and estimate the potential distributional areas of the new species and the other two endemic Iberian species S. occidentalis Fresneda & Fery, 1990 and S. rebeccae Bilton, 2011, based on environmental niche modelling. © 2013 Magnolia Press. Source

Hydroporus sejilashan sp. n. is described from Xizang Autonomous Region (Qinghai-Tibet Plateau), China. It belongs to the acutangulus-complex of the Hydroporus planus-group and can be separated from all four other members of the species complex by the completely distinctly matt surface in both sexes. In addition it can be distinguished from Hydroporus acutangulus Thomson, 1856 and H. polaris Fall, 1923 by the shape of the anterior protarsal claw, which is strongly curved near the base and more straight distally in the latter two species, but evenly curved in the new species and in the other two species of the complex, namely H. tibetanus Zaitzev, 1953 and H. tuvaensis Pederzani, 2001. The habitus of all five members of the complex are provided, along with illustrations of the male and female genitalia of the new species and those of H. tibetanus. The lectotype of H. sumakovi Poppius, 1912, a taxon which until now has been treated as a junior synonym of H. acutangulus, is designated. Preliminary studies reveal that H. sumakovi is probably more closely related to H. polaris than to H. acutangulus. Older, doubtful previous records of Hydroporus nigellus Mannerheim, 1853 from China are confirmed with new records from Qinghai and Sichuan Provinces. Twelve species of the genus Hydroporus Clairville, 1806 are now known from China, only two of which occur in Tibet. Copyright © 2012 · Magnolia Press. Source

Fery H.,Rauschstr. 73 | Hendrich L.,Zoologische Staatssammlung Munich
Spixiana | Year: 2011

Ilybius enpalaiatheka spec. nov. is described from Egirdir (Isparta province) in Anatolia, Turkey. The new species is a member of the Ilybius montanus subgroup within the Ilybius chalconatus group. It is externally similar to the other members of that subgroup, but males can be separated by the shape of the median lobe and that of the parameres, in particular from those of the especially similar Ilybius jaechi (Fery & Nilsson, 1993). The genus Ilybius Erichson, 1832 now contains 71 species, six of which belong to the montanus subgroup. The complete key to species of males of the Ilybius erichsoni and chalconatus groups given by Fery & Nilsson (1993) is modified to include the new species and also the recently described I. adygheanus Petrov, hapovalov & Fery, 2010, and I. thynias Fery & Przewovny, 2010. Ilybius lenensis Nilsson, 2000 is recorded for the first time from Kazakhstan. A few faunistic notes on other Ilybius are also presented. Source

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