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Scientific classification e
Kingdom: Animalia
Phylum: Arthropoda
Subphylum: Chelicerata
Class: Arachnida
Order: Araneae
Infraorder: Araneomorphae
Family: Tetrablemmidae
O. P-Cambridge, 1873[1]

See text.

29 genera, 126 species

The Tetrablemmidae are a spider family with 126 described species in 29 genera that occur throughout the world tropics. They are sometimes called armored spiders.

The family Pacullidae was incorporated into this family in 1981, but in 2016 was restored as a separate family with four genera by Wheeler et al. in a large phylogenetic study.[2]

Most tetrablemmids have been collected from litter and soil, including soil in epiphytes; some live in caves. Some cave species, but also some soil inhabitants, show typical adaptations of cave spiders, such as loss of eyes and weak sclerotization.[3]

Spiders in the genus Paculla are four to five times larger than other tetrablemmids. The genus Tetrablemma features only four eyes, a trait only shared with most species of the not closely related Caponiidae.


Most genera occur in Southeast Asia, only a few in Africa and Central and South America.


As of October 2015, the World Spider Catalog accepted the following genera.[1] Four genera may also be placed in Pacullidae.[2]

See also[edit]


  1. ^ a b "Family: Tetrablemmidae O. Pickard-Cambridge, 1873", World Spider Catalog, Natural History Museum Bern, retrieved 2015-10-29 
  2. ^ a b Wheeler, Ward C.; Coddington, Jonathan A.; Crowley, Louise M.; Dimitrov, Dimitar; Goloboff, Pablo A.; Griswold, Charles E.; Hormiga, Gustavo; Prendini, Lorenzo; Ramírez, Martín J.; Sierwald, Petra; Almeida-Silva, Lina; Alvarez-Padilla, Fernando; Arnedo, Miquel A.; Benavides Silva, Ligia R.; Benjamin, Suresh P.; Bond, Jason E.; Grismado, Cristian J.; Hasan, Emile; Hedin, Marshal; Izquierdo, Matías A.; Labarque, Facundo M.; Ledford, Joel; Lopardo, Lara; Maddison, Wayne P.; Miller, Jeremy A.; Piacentini, Luis N.; Platnick, Norman I.; Polotow, Daniele; Silva-Dávila, Diana; Scharff, Nikolaj; Szűts, Tamás; Ubick, Darrell; Vink, Cor J.; Wood, Hannah M. & Zhang, Junxia (2016). "The spider tree of life: phylogeny of Araneae based on target-gene analyses from an extensive taxon sampling". Cladistics. doi:10.1111/cla.12182. 
  3. ^ Shear, W.A. (1978). Taxonomic notes on the armored spiders of the families Tetrablemmidae and Pacullidae. American Museum Novitates 2650 PDF - Abstract
  • Burger M. et al. (2005): Complex genital system of a haplogyne spider (Arachnida, Araneae, Tetrablemmidae) indicates internal fertilization and full female control over transferred sperm. Journal of Morphology 267(2):166-186. Abstract
  • Tetrablemmidae Armoured Spiders Tetrablemmidae at arachne.org.au