Records by time
Theridiosomatidae 0-19001901-19501951-20002001-2018
Theridiosoma gemmosum (L. Koch, 1877) Almost threatened 19x 8x 27x

Theridiosoma gemmosum (L. Koch, 1877)

Czech namekřižáček pobřežní
Threat levelAlmost threatened
Records27 nálezů, 17 kvadrátů
First record 1996, M. Holec, Buchar & Růžička 2002
Last record 2018 , Radek Šich
Distribution areaEuropean - Me. (Gr.
Phytogeographic areaThermo, Meso
Původnost stanovišťclimax
Humidityvery humid
StratumGround layer
Osvětlení stanovišťsemi-open, partly shaded
Hojnost výskytuscarce probably
Altitude170-430

Bibliography

© Oto Zimmermann
The studied locality, i.e. Klánovický les Forest is situated on the edge of Prague, one of the most polluted areas in the Czech Republic. Thanks to large area the forest acts as an isolation from agrochemicals, thus allowing the existence of some habitats sensitive to eutrophisation, in particular peat-bogs, heaths, bare sandy soils, and Molinia meadows. The habitats harbour unusually high species diversity of spiders and
harvestmen: the author recorded 286 spider and 11 harvestman species there, which is approximately one third of the Czech fauna. Sixty one of them are red-listed in the Czech Republic. Peat-bog linyphiid Saaristoa abnormis, and steppe lycosid Alopecosa schmidti and linyphiid Panamomops inconspicuus are listed as endangered. Local small peat-bogs offer suitable conditions for disappearing lycosids Hygrolycosa
rubrofasciata, Pirata piscatorius and Piratula uliginosa, while heaths harbour the disappearing Oxyopes ramosus. Water spider Argyroneta aquatica has recently been found in small pools in ditches along the railway. Littoral vegetation is inhabited by Theridiosoma gemmosum and the jumping spider Calositticus floricola. Disturbed soil surface of wet meadows harbours the wolf spider Arctosa leopardus. Some species have recently appeared at the site, for example Dysdera hungarica, the harvestman Nemastoma bidentatum sparsum or the crab spider Synema globosum. The first two were probably introduced there by man, the latter probably expands due to climate change. The author suggests to keep these habitats without woody vegetation to protect local high species diversity there.


© Oto Zimmermann

V roce 2012–2013 byl proveden první inventarizační průzkum pavouků v NPR Zástudánčí. Na území rezervace bylo zjištěno 117 druhů pavouků z 21 čeledí. Druhy Arctosa cinerea, Caviphantes saxetorum, Clubiona germanica a Sitticus dzieduszyckii jsou zařazeny v červeném seznamu pavouků ČR a jsou zároveň nejvýznamnějšími nálezy. Pavučenka Caviphantes saxetorum je novým druhem pro Českou republiku. Nejzajímavější společenstvo pavouků bylo zjištěno na štěrkových náplavech v meandru řeky Moravy.



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Statistics

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By altitude


By collecting method (21 used records)
Theridiosoma gemmosum (L. Koch, 1877) LCMalesFemalesJuvenilesRecords
Individuální sběr413414
Smyk2102
Prosev1302
Zemní past6332
Sklepávání0101
 MalesFemalesJuvenilesRecords

By biotope (22 used records)
Theridiosoma gemmosum (L. Koch, 1877) LCMalesFemalesJuvenilesRecords
Rákosiny, orobincové porosty1316
lužní lesy nížin2001
Devětsilové lemy horských toků, bylinné porosty břehů0101
Bylinné porosty na březích potoků a řek6432
Močály4917
Porosty vysokých ostřic0525
 MalesFemalesJuvenilesRecords