In memoriam Prof. Dr. Joachim Adis, 1950 - 2007

Nachru

Chthonius (Ephippiochthonius) poeninus : a “Swiss endemic species” in the Allgäu Alps (Pseudoscorpiones: Chthoniidae)

In the course of a long term survey on the effects of grazing on the diversity of alpine grasslands, the false scorpion Chthonius (Ephippiochthonius) poeninus Mahnert, 1979 was recorded for the first time outside of Switzerland. The preferred habitat at the locality Alpe Einödsberg (Germany, Bavaria) differs strongly from previous findings. Our data suggest an association with Nardus grasslands (Geo montani-Nardetum), whereas earlier records originated from leaf litter, moss and mouldy trunks. Furthermore, the new records between 1540 m and 1973 m above sea level are the first from the subalpine region of the Alps (hitherto C. poeninus was known from 550 m to 1450 m). In the study region, extensive grazing seems to have a positive effect on the abundance of the species, while it is missing from intensively grazed pastures

Die epigäische Spinnenfauna (Arachnida, Araneae) in Sandrasen, Borstgrasrasen und Ruderalfluren im Naturschutzgebiet "Alter Flugplatz Karlsruhe"

Epigeic spiders were sampled using pitfall traps during one year in an anthropogenic open site within the city of Karlsruhe (Alter Flugplatz Karlsruhe). The area, historically used as a military parade ground and airport, is protected as a Special Area of Conservation (SAC) within the Natura 2000 network of the EU and since 2010 as a German nature reserve. We were interested in the diversity, assemblage structure and distribution of spider species within the area and investigated three different plant formations: sparse grass-dominated vegetation with frequent open sand patches (sandy turf ), closed grassland dominated by the mat-grass (Nardus stricta) and ruderal vegetation with blackberry bushes. 123 species were identified from these captures, including many specialists of xerothermic habitats and rare and endangered species like Alopecosa striatipes, Agroeca lusatica, Haplodrassus dalmatensis, Styloctetor romanus, Typhochrestus simoni and Xysticus striatipes as well as extremely rare species of unclassified red list status like Mysmenella jobi, Theonoe minutissima and Zora parallela. The three investigated habitat types were quite similar concerning α-diversity, while measures of β-diversity indicated a strong species turnover. By performing an ecological habitat analysis (using autecological data on spiders) essential differences between the three habitat types could not be discovered, especially not between mat-grass and sandy turf. However, analysing the guild structures showed that different ways of using habitat resources dominated in the different habitat types. For Nardus-grassland several species could be identified as indicator species. While many xero- and photophiles live in the open grassland, the stenotopic psammophiles of inland dunes in the region were not found. The ruderal area houses a mix of grassland- and forest species

Effects of the foraging of Eciton burchelli (Hymenoptera, Formicidae) on the spider fauna in the litter of a tropical rain forest in Central Amazonia

We investigated the impact of swarm-hunting army ants of the species Eciton burchelli on the ground spider assemblage in an Amazonian "terra firme" rain forest. Spiders were collected from 20 quadrat litter samples taken in front of 7 hunting swarms and 20 samples taken in the same areas after army ants had passed, and were identified to genus or species level. Observed significant effects on the abundance of several spider groups are discussed on the base of the prey-spider spectrum of the ants, known from a study in the same forest. We discuss several difficulties and chances of misinterpretation of the results, due to the high natural variability of arthropod abundance in the habitat and the restriction of the method under the conditions of the field study.Investigamos o efeito do forrageamento de formigas de correição da espécie Eciton burchelli, a qual caça em forma de enxame, sobre a comunidade de aranhas de liteira em uma floresta tropical de terra firme na Amazônia Central. O método usado foi a amostragem de aranhas por triagem manual de liteira, coletando-se 20 quadrados na frente de 7 enxames de caça das formigas e 20 quadrados logo após a passagem das formigas. As aranhas foram identificadas ao nível de gênero ou espécie e efeitos significativos foram avaliados levando-se em conta o espectro de aranhas-presa destas formigas, conhecido por um estudo na mesma área. Discutem-se as dificuldades e possíveis erros na avaliação do efeito das formigas sobre artrópodos causados pela variância natural de abundâncias e pela restrição da metodologia sob as circunstâncias estudadas

In memoriam Prof. Dr. Joachim Adis, 1950 - 2007

obituary, bibliography, Joachim Adi

Erstnachweis von Oxyopes lineatus in Deutschland und faunistisch-taxonomische Anmerkungen zu weiteren besonderen Arten aus Baden-Württemberg (Araneae: Lycosidae, Oxyopidae, Salticidae, Thomisidae, Trachelidae)

The first record of the oxyopid spider Oxyopes lineatus Latreille, 1806 in Germany is presented together with information on the place of discovery, current distribution and taxonomy. Other interesting spider records from Baden-Württemberg (Germany) in the collection of the Natural History Museum Karlsruhe are presented and discussed. Runcinia grammica (C. L. Koch, 1837) and Paratrachelas maculatus (Thorell, 1875) are reported for the first time for Baden-Württemberg; a record of Thanatus arenarius L. Koch, 1872 is the first rediscovery of this species here for over 100 year. The following taxonomical changes, which were proposed by Simon but not followed in the World Spider Catalog, are confirmed: Sphasus lineatus C.L. Koch, 1837 (misidentification) and Sphasus lineatus Blackwall, 1861 (misidentification) = Oxyopes heterophthalmus (Latreille, 1804)

Systematics and ecology of ground spiders (Araneae, Gnaphosidae) from central Amazonian inundation forests. American Museum novitates ; ; no. 2971.

16 p. : ill. ; 26 cm.Includes bibliographical references (p. 16

Revision of the genus Corythalia C.L. Koch, 1850, part 1: Diagnosis and new species from South America (Araneae: Salticidae: Salticinae: Euophryini)

Bayer, Steffen, Höfer, Hubert, Metzner, Heiko (2020): Revision of the genus Corythalia C.L. Koch, 1850, part 1: Diagnosis and new species from South America (Araneae: Salticidae: Salticinae: Euophryini). Zootaxa 4806 (1): 1-144, DOI: 10.11646/zootaxa.4806.1.