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

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 act
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.
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Metadaten
Author:Patrick Muff, Martin H. Schmidt, Holger Frick, Wolfgang Nentwig, Christian Kropf
URN:urn:nbn:de:hebis:30-1154572
ISSN:1018-4171
Parent Title (German):Arachnologische Mitteilungen
Publisher:Arachnologische Ges.
Place of publication:Nürnberg
Document Type:Article
Language:English
Date of Publication (online):2010/06/08
Year of first Publication:2007
Publishing Institution:Univ.-Bibliothek Frankfurt am Main
Release Date:2010/06/08
Tag:Diversity ; Meloneta alpica; dwarf-shrub heath ; forest ; habitat boundary
Issue:34
Pagenumber:9
First Page:16
Last Page:24
HeBIS PPN:22626694X
Dewey Decimal Classification:590 Tiere (Zoologie)
Sammlungen:Sondersammelgebiets-Volltexte
Zeitschriften / Jahresberichte:Arachnologische Mitteilungen, Heft 34 (2007)
Journal: Dazugehörige Zeitschrift anzeigen
Licence (German):License Logo Veröffentlichungsvertrag für Publikationen

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