Heft 30 (2005)
Abundanz und Vikarianz epigäischer Weberknechtarten (Arachnida: Opiliones) in einem Auwaldgebiet des Mainzer Beckens
Abundance and vicariance of epigeic opilionids (Arachnida: Opiliones) of an inundation forest in the "Mainzer Becken", Germany
faunistics; floodplain; harvestmen; phenology; survival strategy
Abstract
From the beginning of November 2003 to January 2004 the opilionid fauna was collected in a floodplain forest of the Rhine valley west of Mainz. Altogether 1643 individuals were captured in pitfall traps; these belong to six species representing three families. The thermophilous species Astrobunus laevipes, Nemastoma dentigerum and Trogulus martensi are noteworthy for this habitat. Results on the phenology of three stenochronous species over the sample periods are presented, and both activity abundance and dominance were measured. Additionally survival strategies for flooding periods are proposed and vicariance and concurrence with related species are discussed.
Neue Nachweise bi- und unisexueller "Populationen" von Megabunus lesserti (Opiliones: Phalangiidae) in den Nordostalpen
Bisexuals surrounded by all-female clones: new records of Megabunus lesserti (Opiliones: Phalangiidae) in the north-eastern Alps
Austria; Eastern Alps; faunistics; geographic parthenogenesis; harvestmen; Opiliones; sex ratio; spanandry
Abstract
New data on the sex ratio of 16 populations of the endemic harvestman Megabunus lesserti Schenkel, 1927 in the northeastern Alps confirm the previously assumed pattern of geographic parthenogenesis. Bisexuals inhabit a small area between the eastern margin of the Northern Calcareous Alps and the Ennstaler Alps, which was covered by ice during the last (Würm) glaciations. Postglacially recolonized areas are occupied by parthenogenetic clones. Some all-female samples were found in close geographic proximity to bisexual populations. Apparently isolated occurrences at the western (Ammergau Alps) and southwestern (Carinthian) limits of the range proved to consist exclusively of females. A single male recorded in the Karwendel Mts. near Innsbruck is interpreted preferentially as a case of spanandry, being a fatherless "mistake" without any significant function.
Mittel- und nordeuropäische Weberknechte aus dem Senckenberg Museum Frankfurt (Arachnida: Opiliones)
Central and North European harvestmen from the Senckenberg Museum Frankfurt (Arachnida: Opiliones)
Austria; France; Germany; Ireland; Norway; Opiliones; Poland; Senckenberg Museum; Sweden; Switzerland
Abstract
About 1100 individuals belonging to 32 opilionid species (300 series), mainly of German origin, were identified based on material provided by, and stored at, the Senckenberg Museum, Frankfurt (Main). A list of all species with habitat information is included. Comments on two remarkable species (Oligolophus hanseni, Odiellus spinosus) are given. The comments include the importance of some series as reference material from MARTENS (1978), additions to regional faunas and the expansion of the known distribution of some thermophilous species.
Jörg Wunderlich (Hrsg.) (2004): Fossil Spiders in Amber and Copal. Fossile Spinnen in Bernstein und Kopal
Jörg Wunderlich (ed.) (2004): Fossil Spiders in Amber and Copal. Fossile Spinnen in Bernstein und Kopal
book review
Abstract
book review: Jörg Wunderlich (ed.) (2004): Fossil Spiders in Amber and Copal. Fossile Spinnen in Bernstein und Kopal.