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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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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: 630071
  Adult

Coronel Suárez
Buenos Aires
Argentina
04/08/2025
Facundo Moyano Peña
Foto
Photography ID: 627520
  Adult

Mar de Ajó
Buenos Aires
Argentina
02/11/2025
Diego Trillo
Foto
Photography ID: 610928
  Adult

Conesa
Río Negro
Argentina
11/26/2024
Miguel Angel Barberis
Foto
Photography ID: 579083
  Adult

Mar del Plata
Buenos Aires
Argentina
04/05/2024
Lucas Saldivia
Foto
Photography ID: 554221
  Adult

Paraná
Entre Ríos
Argentina
10/29/2023
Néstor Trossero
Foto
Photography ID: 554219
  Adult

Paraná
Entre Ríos
Argentina
10/29/2023
Néstor Trossero
Foto
Photography ID: 546930
  Adult

Ensenada
Buenos Aires
Argentina
09/06/2023
Diego Varales
Foto
Photography ID: 452844
  Adult

Paraná
Entre Ríos
Argentina
07/02/2021
Néstor Trossero
Foto
Photography ID: 448798
  Adult

Santo Tomé
Santa Fe
Argentina
06/02/2021
Eduardo Beltrocco
Foto
Photography ID: 394644
  Adult

Santo Tomé
Santa Fe
Argentina
04/13/2020
Leila Lodi
Foto
Photography ID: 351066
  Juvenile

Paraná
Entre Ríos
Argentina
09/15/2019
Néstor Trossero
Foto
Photography ID: 333252
  Adult

Paraná
Entre Ríos
Argentina
05/20/2019
Néstor Trossero



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 Reports


 Detail of places sorted by number of records








Page 1
Record IDDateExact timeCountryProvince / departmentPlaceFilmedPhotographedRecorded vocalObservedHeardWounded or deadNumber of individualsUser or BibliographyDetail
242285219/01/2026ArgentinaBuenos AiresLas ToninasRomán Montero
227195108/04/2025ArgentinaBuenos AiresCoronel SuárezFacundo Moyano Peña
226465511/02/2025ArgentinaBuenos AiresCiudad, Mar de AjóDiego Trillo
220078126/11/2024ArgentinaRío NegroGeneral Conesa, ConesaMiguel Angel Barberis
202028805/04/2024ArgentinaBuenos AiresCasa particular, Mar del PlataLucas Saldivia
190533029/10/2023ArgentinaEntre RíosZona urbana, ParanáNéstor Trossero
182083206/09/2023ArgentinaBuenos AiresClub Regatas, EnsenadaDiego Varales
142404202/07/2021ArgentinaEntre RíosZona urbana, ParanáNéstor Trossero
141218902/06/2021ArgentinaSanta FeSarmiento y Centenario, Santo ToméEduardo Beltrocco
123594313/04/2020ArgentinaSanta FeSarmiento y Centenario, Santo Tomé1Leila Lodi
Page 1

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Citation recommended:

EcoRegistros. 2026. Pholcus phalangioides - Species sheet. Acceded from https://www.ecoregistros.org on 11/04/2026.