ARACHNOLOGISCHE GESELLSCHAFT

Arachnologische Mitteilungen

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Die Pseudoskorpion-Fauna (Arachnida: Pseudoscorpiones) eines Auwaldes bei Ingelheim am Rhein, unter besonderer Berücksichtigung der Auswirkungen des trocken-warmen Winters 2006/2007

The pseudoscorpion-fauna (Arachnida: Pseudoscorpiones) of a floodplain close to Ingelheim/Rhine, with special reference to the effects of the dry-warm winter 2006/2007

Abstract

From the beginning of May 2005 to September 2007 the pseudoscorpion fauna in a hardwood floodplain forest of the Rhine valley near Ingelheim was investigated. Altogether 587 individuals representing two species from two families were captured using pitfall traps, trunk eclectors and by litter sieving. The warm, dry winter 2006/2007 exhibited a strong influence upon the activity of Neobisium carcinoides (Hermann, 1804). This winter event was followed by an extreme drought in April 2007, which affected the activity maximum of the corticolous species Chernes hahnii (C.L. Koch, 1839). In 2005 and 2006 the activity maximum of C. hahnii was observed in July, whereas in 2007 maturity was achieved earlier in May. Furthermore 31 individuals of N. carcinoides were captured in trunk eclectors. This climbing behaviour correlates with the presence of Lepidocyrtus lignorum (Collembola: Entomobryidae) on the trunks.

Leiobunum religiosum: neu für Deutschland (Arachnida: Opiliones)

Leiobunum religiosum (Arachnida: Opiliones): first record for Germany

Abstract

L. religiosum Simon, 1879 was found at Mayen near Koblenz (Rhineland-Palatinate), Germany. This is the first record for Germany and is about 500 km from the known distribution area of the species in the southwestern Alps. The German population seems to be restricted to the ancient Roman quarry “Mayener Grubenfeld” where it is confined to stone walls and cave systems with balanced microclimatic conditions. Genital morphological structures were found to be very fragile, were easily deformed and therefore apparently variable. Difficulties in using these characters for taxonomy are discussed. Ecology, provenance and conservation status of the newly discovered population are considered.

First record of Hypsocephalus dahli in Switzerland with a review of ist distribution, ecology and taxonomy (Araneae, Linyphiidae)

First record of Hypsocephalus dahli in Switzerland with a review of ist distribution, ecology and taxonomy (Araneae, Linyphiidae)

Abstract

The spider species Hypsocephalus dahli (Lessert, 1909) is recorded for the first time in Switzerland from museum material collected in 1974. The information given in the literature and unpublished data on this rare species are summarised including an annotated distribution map. All published pictures of males are compared with the holotype. Figures of the male palp and the vulva of the Swiss specimens are provided.

Ricardo Pinto-da-Rocha, Glauco Machado & Gonzalo Giribet (Hrsg.) (2007): Harvestmen, the biology of Opiliones

Ricardo Pinto-da-Rocha, Glauco Machado & Gonzalo Giribet (eds.) (2007): Harvestmen, the biology of Opiliones

Abstract

book review: Ricardo Pinto-da-Rocha, Glauco Machado & Gonzalo Giribet (Hrsg.) (2007): Harvestmen, the biology of Opiliones

David Penney (2008): Dominican amber spiders: a comparative palaeontological-neontological approach to identification, faunistics, ecology and biogeography

David Penney (2008): Dominican amber spiders: a comparative palaeontological-neontological approach to identification, faunistics, ecology and biogeography

Abstract

book review: David Penney (2008): Dominican amber spiders: a comparative palaeontological-neontological approach to identification, faunistics, ecology and biogeography

70 Jahre Arachnologie in Georgien: Tamara S. Mkheidze (1915 - 2007)

70 years arachnology in Georgia: Tamara S. Mkheidze (1915 - 2007)

Abstract

obituary, bibliography, Tamara S. Mkheidze

Spider fauna of semi-dry grasslands on a military training base in Northwest Germany (Münster)

Spider fauna of semi-dry grasslands on a military training base in Northwest Germany (Münster)

Abstract

The spider fauna of semi-dry grasslands on the military training area of Dorbaum near Münster (North Rhine-Westphalia) was investigated. From 2002 to 2003 a total of 11,194 mature spiders from 141 species and 20 families was caught by pitfall trapping and hand sampling. Among them are 18 species listed in the Red Data Book of North Rhine-Westphalia, four species are rare or previously rarely recorded. Most of the spiders are habitat generalists that extend their occurrence into all types of habitats, while the number of species which are stenotopic to sand habitats is noticeably low (n = 13). The spider data were analysed with Principal Component Analysis (PCA). It is possible to distinguish spider communities of neighbouring forested habitats from species groups of open habitats, but there is no uniform spider community which is characteristic for semi-dry grassland.

Arachnologische Mitteilungen 35, 2008

Arachnologische Mitteilungen 35, 2008

Blätterbare Version ansehen

300 Jahre Carl von Linné (1707-1778)

Carl von Linné (1707-1778) – 300 years on

Abstract

On the occasion of Linné's 300th anniversary, a short biography, based mainly on Weimarck (2007), is presented.

Spiders (Araneae) of the family Oonopidae in the Czech Republic

Spiders (Araneae) of the family Oonopidae in the Czech Republic

Abstract

The oonopid spiders (Oonopidae), Tapinesthis inermis (Simon, 1882) and Triaeris stenaspis Simon, 1891, are recorded for the Czech Republic for the first time. T. inermis was redetermined from misidentified material and T. stenaspis was discovered in a greenhouse.

Notes on Cesonia, a newly recorded genus for the Asian spider fauna (Araneae, Gnaphosidae)

Notes on Cesonia, a newly recorded genus for the Asian spider fauna (Araneae, Gnaphosidae)

Abstract

The spider species Cesonia aspida Chatzaki, 2002, together with its genus Cesonia Simon, 1893, was found in Anatolia (Turkey) and represent new records for the Asian spider fauna. Its characteristic features, drawings of genitalia, a photograph of the general habitus and a distribution map for Eurasia are presented.

Ein Beitrag zur Phänologie von Larinioides sclopetarius (Araneae: Araneidae)

A contribution towards the phenology of Larinioides sclopetarius (Clerck, 1757) (Araneae: Araneidae)

Abstract

We investigated a colony of Larinioides sclopetarius, the bridge spider, situated at a bridge-like dam in the city of Duisburg, Germany. The study ran from March until October 2004. The mean population density (all size classes) was 26.2 ind./m². The absolute maximum was found in July (71.3 ind./m²). Most of the spiderlings were found from June to October with mean densities up to 30.9 ind./m² in July, indicating that breeding of L. sclopetarius started in summer. Adult males and females occurred in spring, although the highest abundances (up to more than 3 individuals of each sex per m²) were found in summer and autumn. The adult sex ratio averaged over the study period was 1:1.2 (males:females). Some comparisons with other araneids, both solitary and social species, are drawn and discussed.

Spider (Arachnida: Araneae) distribution across the timberline in the Swiss Central Alps (Alp Flix, Grisons) and three morphologically remarkable species

Spider (Arachnida: Araneae) distribution across the timberline in the Swiss Central Alps (Alp Flix, Grisons) and three morphologically remarkable species

Abstract

We collected 6251 adult epigeic spiders from the dwarf-shrub heath to subalpine coniferous forest on Alp Flix (CH, canton Grisons, 1950 m) between May 2005 and May 2006 using pitfall traps. Total species richness and activity density of all species decreased from the open land to the forest, although this pattern varied according to family. The distribution of the 102 species found indicates that the small area around a single tree at the timberline provides habitats for both open land and forest spider species as well as some possible timberline specialists. Five species were new to the canton Grisons: Centromerita bicolor, Centromerita concinna, Hilaira excisa, Meioneta alpica and Tallusia experta. Three species showed remarkable morphological characteristics and were analysed in more detail. We found males of Pelecopsis radicicola without the characteristic longitudinal depression on the raised carapace. It is shown that the males of Meioneta alpica have a considerably variable lamella characteristica, which is nevertheless distinct from the sister species Meioneta ressli. Because we found intermediate forms of the head region described for Metopobactrus prominulus and M. schenkeli, respectively, M. schenkeli is considered a syn. nov. of M. prominulus. This study shows that the known distribution and taxonomic status of various spider taxa in the Central Alps are still incomplete and further work on arthropods in remote areas should be strongly encouraged.

Bernard Le Peru (2007): Catalogue et répartition des araignées de France

Bernard Le Peru (2007): Catalogue et répartition des araignées de France

Abstract

book review: Bernard Le Peru (2007): Catalogue et répartition des araignées de France

Statt einer Buchbesprechung: Wie geht man mit Plagiaten um?

Instead of a book review: how to deal with plagiarism?

Abstract

book review, plagiarism

An unidentified harvestman Leiobunum sp. alarmingly invading Europe (Arachnida: Opiliones)

An unidentified harvestman Leiobunum sp. alarmingly invading Europe (Arachnida: Opiliones)

Abstract

Since about the year 2000 a hitherto unidentified species of the genus Leiobunum C. L. Koch, 1839, has rapidly invaded central and western Europe. Records are known from The Netherlands (probably the country of first occurrence in Europe), Germany, Austria and Switzerland. This introduced species, until now, mainly inhabits walls of buildings and rocky environments. Adults characteristically aggregate during daytime into groups of up to 1.000 individuals. The species is described and details on its present distribution, habitat preference, phenology and behaviour are presented.

Cover/Contents Arachnologische Mitteilungen 34, 2007

Cover/Contents Arachnologische Mitteilungen 34, 2007

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

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

Abstract

obituary, bibliography, Joachim Adis

Europäische Spinne des Jahres 2008 ist die Gattung Tegenaria

European Spider of the Year 2008 is the genus Tegenaria

Abstract

European Spider of the Year 2008

Konrad-Thaler-Gedächtnispreis der Arachnologischen Gesellschaft

Konrad-Thaler-Gedächtnispreis der Arachnologischen Gesellschaft

Abstract

memorial award, Konrad-Thaler-Gedächtnispreis