Nuctenea umbratica (Clerck, 1757)
Type status: Other material Occurrence: recordedBy: Kuntner, Gregorič , Čandek ; sex: 1 female; Location: locationID: CH10; country: Switzerland ; locality: Bernese Alps, Kleine Scheidegg ; minimumElevationInMeters: 2061; maximumElevationInMeters: 2061; decimalLatitude: 46.5853 ; decimalLongitude: 7.9606 ; Event: eventDate: 2011-07-09 ; habitat: grassland
Type status: Other material Occurrence: recordedBy: Kuntner, Gregorič , Čandek ; sex: 1 female; Location: locationID: CH12; country: Switzerland ; locality: Bernese Alps, Nessental ; minimumElevationInMeters: 930; maximumElevationInMeters: 930; decimalLatitude: 46.7213 ; decimalLongitude: 8.3039 ; Event: eventDate: 2011-07-10 ; habitat: grassland and loan trees
Type status: Other material Occurrence: recordedBy: Kuntner, Čandek ; sex: 2 females, 1 male; Location: locationID: SI50; country: Slovenia ; locality: Sp. Praprece ; minimumElevationInMeters: 351; maximumElevationInMeters: 351; decimalLatitude: 46.1620 ; decimalLongitude: 14.6933 ; Event: eventDate: 2010-08-03/2012-05-28 ; habitat: house and surroundings
Type status: Other material Occurrence: recordedBy: Kostanjšek , RTŠB 2011 ; sex: 1 male; Location: locationID: SI68; country: Slovenia ; locality: Sv. Jurij ob Scavnici ; minimumElevationInMeters: 235; maximumElevationInMeters: 235; decimalLatitude: 46.5687 ; decimalLongitude: 16.0223 ; Event: eventDate: 2011-07-22 ; habitat: school
- Candek, Klemen, Gregoric, Matjaz, Kostanjsek, Rok, Frick, Holger, Kropf, Christian, Kuntner, Matjaz, Miller, Jeremy A., Hoeksema, Bert W. (2013): Targeting a portion of central European spider diversity for permanent preservation. Biodiversity Data Journal 1, 980: 980-980, URL:http://dx.doi.org/10.3897/BDJ.1.e980
Nuctenea umbratica Clerck, 1757
Type status: Other material Occurrence: recordedBy: C. Deltshev & M. Komnenov ; sex: 1 male, 3 females; Location: country: FYR of Macedonia ; locality: Galichitsa Mt., Stenje vill., Stenjsko Blato bog ; verbatimElevation: 850 m; Event: eventDate: 17-06-2008
Previously recorded from unspecified locality between Resen and Ohrid ( Drensky 1929 , Drensky 1936 ).
- Deltshev, Christo, Komnenov, Marjan, Blagoev, Gergin, Georgiev, Teodor, Lazarov, Stoyan, Stojkoska, Emilija, Naumova, Maria (2013): Faunistic diversity of spiders (Araneae) in Galichitsa mountain (FYR Macedonia). Biodiversity Data Journal 1, 977: 977-977, URL:http://dx.doi.org/10.3897/BDJ.1.e977
Molecular Biology and Genetics
Statistics of barcoding coverage: Nuctenea umbratica
Public Records: 0
Specimens with Barcodes: 14
Species With Barcodes: 1
The species name umbratica means "living in the shadows" in Latin.
The walnut orb-weaver spider is very wide and flattened, with a leathery skin. Its color ranges from red brown and grey brown to black with a dark, yellowish to yellow-greenish leaf-like fleckled marking on its opisthosoma, where small dents are visible. These are the onsets of muscles that flatten the abdomen.
Female N. umbratica can reach up to 15 mm in size, the males grow only up to 8 mm.
The spider hides during the day outside of buildings in wall crevices, or under loose bark. They are very common in Central Europe; females occur all year long, while males appear mostly during summer. This spider has a flattened body, helping it to secrete itself in cracks and crevices. Walnut orb-weaving spiders are capable of concealing themselves in very confined spaces. This tends to act as a defensive advantage and increases the amount of locations an orb-web can be effectively constructed.
In the evening the spider constructs an orb-web that can be up to 70 cm in diameter. A signaling thread leads from the web to her hiding place. After dusk she sits in the web's center.
This spider is capable of biting humans, causing itchiness and a burning sensation followed by a red patch with white lumps.
Distribution and subspecies
- Nuctenea umbratica (Clerck, 1757) — Europe to Azerbaijan
- Nuctenea umbratica nigricans (Franganillo, 1909) — Portugal
- Nuctenea umbratica obscura (Franganillo, 1909) — Portugal
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