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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 Buenos Aires

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: 665667
  Adult

Vicente López
Buenos Aires
Argentina
01/02/2026
Marcos Garberoglio
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: 579083
  Adult

Mar del Plata
Buenos Aires
Argentina
04/05/2024
Lucas Saldivia
Foto
Photography ID: 573897
  Adult

Cañuelas
Buenos Aires
Argentina
03/03/2024
Gustavo Pascuas
Foto
Photography ID: 560052
  Adult

Villa Gesell
Buenos Aires
Argentina
12/10/2023
Marcos Garberoglio
Foto
Photography ID: 546930
  Adult

Ensenada
Buenos Aires
Argentina
09/06/2023
Diego Varales
Foto
Photography ID: 516699
  Adult

Ensenada
Buenos Aires
Argentina
12/03/2022
Diego Varales
Foto
Photography ID: 499060
  Adult

Florida
Buenos Aires
Argentina
12/30/2021
Marcos Garberoglio
Foto
Photography ID: 459904
  Adult

La Plata
Buenos Aires
Argentina
10/20/2018
Facundo Quintela
Foto
Photography ID: 446693
  Adult

San Fernando
Buenos Aires
Argentina
04/26/2013
Daniel Osvaldo Fernández
Foto
Photography ID: 431815
 
Florencio Varela
Buenos Aires
Argentina
01/10/2021
Mateo Cocimano



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Last Vocalizations published




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Last Filmings published


Video ID: 5714
  Adult

Adrogué
Buenos Aires
Argentina
03/03/2023
Violeta Cicchino



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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
240931002/01/2026ArgentinaBuenos AiresQuinta Trabucco, Vicente LópezMarcos Garberoglio
227195108/04/2025ArgentinaBuenos AiresCoronel SuárezFacundo Moyano Peña
226465511/02/2025ArgentinaBuenos AiresCiudad, Mar de AjóDiego Trillo
214591408/09/2024ArgentinaBuenos AiresRuta Provincial 302Santiago Juan Torres
202028805/04/2024ArgentinaBuenos AiresCasa particular, Mar del PlataLucas Saldivia
200589703/03/2024ArgentinaBuenos AiresCañuelasGustavo Pascuas
192974010/12/2023ArgentinaBuenos AiresVilla GesellMarcos Garberoglio
182083206/09/2023ArgentinaBuenos AiresClub Regatas, EnsenadaDiego Varales
178434103/03/2023ArgentinaBuenos AiresAdroguéVioleta Cicchino
Page 1

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Citation recommended:

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