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Ectobius pallidus MHNT profil.jpg
Ectobius pallidus
Scientific classification e
Kingdom: Animalia
Phylum: Arthropoda
Class: Insecta
Order: Blattodea
Family: Ectobiidae
Subfamily: Ectobiinae
Genus: Ectobius
Stephens, 1835

See article text

Ectobius is a genus of non-cosmopolitan cockroaches native to Old World described by Stephens in 1835,[1] belonging to the family Ectobiidae, subfamily Ectobiinae.[2] This genus has been subject to a number of revisions.[3][4]


Ectobius species – Nymph

The adult 'cockroaches' reach 6–12 millimetres (0.24–0.47 in) of length, the basic coloration of their body is mostly brown or yellowish, with a clearer margin.

The females are usually bigger than the males and have shorter wings, while in the males wings cover at least the whole abdomen.


Species of this genus are mainly present in most of Europe, Africa, in eastern Palearctic realm and the Near East. The "lesser cockroach" (i.e. as found in Britain), previously placed here, is now in the genus Capraiellus.[4]

Some members of the genus occurred in North America until an estimated 49 million years ago, but the genus was absent from the continent until recent reintroductions of some cool-adapted species in eastern Canada and the eastern United States.[5]


Ectobius lapponicus
Ectobius pallidus
Ectobius sylvestris
Ectobius vittiventris

The Cockroach Species File lists:[2]

subgenus Ectobiola Uvarov, 1940 (synonym Ectobiella Adelung, 1917)
subgenus Ectobius Stephens, 1835


  1. ^ Stephens (1835) Illustrations of British Entomology. Mandibulata. Baldwin & Cradock, London, vol. VII, p. 1–306.
  2. ^ a b Cockroach Species File (retrieved 6 January 2021)
  3. ^ Bohn, H. 1989: Revision of the sylvestris group of Ectobius Stephens in Europe (Blattaria: Blattellidae). Entomologica Scandinavica, 20: 317–342.
  4. ^ a b Bohn (2013) In Bohn, Beccaloni, Dorow & Pfeifer. Another species of European Ectobiinae travelling north – the new genus Planuncus and its relatives (Insecta: Blattodea: Ectobiinae). Arthropod Systematics & Phylogeny 71(3): 147.
  5. ^ Vršanský, P.; Oružinský, R.; Barna, P.; Vidlička, L'.; Labandeira, C. C. (2014). "Native Ectobius (Blattaria: Ectobiidae) From the Early Eocene Green River Formation of Colorado and Its Reintroduction to North America 49 Million Years Later". Annals of the Entomological Society of America. 107 (1): 28–36. doi:10.1603/AN13042. ISSN 0013-8746.

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