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Pholcus phalangioides
(Fuesslin, 1775)
Araña De Patas Largas

Family: Pholcidae
Order: Araneae
Class: Arachnida
Phylum / Division: Arthropoda
Kingdom: Animalia

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Records from Mar del Plata

Other common names: Araña Patona, Araña De Las Casas.


Description: It has a somewhat elongated body and very long, thin legs, which is the most noticeable characteristic when differentiating it from spiders of other families. However, it shares this trait with other species of the Pholcidae family.

Sexual Dimorphism: Difficult to notice with the naked eye, but when observed closely, the modified pedipalps (mouthparts) of the male are visible, which serve a reproductive function. It is common to see females with their egg sac, which is circular in shape and not covered with silk, held by their chelicerae (mouthparts).

Habitat: Naturally inhabits caves and crevices, however, the species has adapted to living inside all kinds of human-made structures, both inhabited and abandoned, where it is a very abundant species.

Geographical Distribution: Cosmopolitan species, likely due to the involuntary transport of specimens by humans worldwide.

Behavior: It constructs an irregular and three-dimensional web, from which it hangs inverted. When disturbed, it performs a series of body vibrations, shaking rapidly from side to side as a defense mechanism.

Feeding: It is a sedentary species that consumes insects trapped in its web.

Author of this description: Nicolás Olejnik




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Last published photographs

Foto
Photography ID: 579083
  Adult

Mar del Plata
Buenos Aires
Argentina
04/05/2024
Lucas Saldivia
Foto
Photography ID: 184751
  Adult

Mar del Plata
Buenos Aires
Argentina
01/10/2017
Jorge Iriberri
Foto
Photography ID: 135009
  Adult

Mar del Plata
Buenos Aires
Argentina
01/27/2016
Luciano Peralta
Foto
Photography ID: 135008
  Adult

Mar del Plata
Buenos Aires
Argentina
01/27/2016
Luciano Peralta
Foto
Photography ID: 133012
  Adult

Mar del Plata
Buenos Aires
Argentina
12/31/2015
José Luis Ianiro



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Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
202028805/04/2024ArgentinaBuenos AiresCasa particular, Mar del PlataLucas Saldivia
52572810/01/2017ArgentinaBuenos AiresCiudad, Mar del PlataJorge Iriberri
155444327/01/2016ArgentinaBuenos AiresMar del PlataLuciano Peralta
38766731/12/2015ArgentinaBuenos AiresCiudad, Mar del PlataJosé Luis Ianiro
2194809/07/2009ArgentinaBuenos AiresMar del PlataNicolas Olejnik
Page 1

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Citation recommended:

EcoRegistros. 2026. Pholcus phalangioides - Species sheet. Acceded from https://www.ecoregistros.org on 10/03/2026.