Ectobiidae

Brunner von Wattenwyl, 1865

Wood Cockroaches

Subfamily Guides

Blattellinae(wood cockroaches)
Ectobiinae(wood cockroaches)
Pseudophyllodromiinae

is a of in the order Blattodea, formerly known as Blattellidae. The family contains many of the smaller common household pest cockroaches, including the globally significant German cockroach (Blattella germanica). Members are sometimes called wood cockroaches. The family is distributed worldwide and includes several : Blattellinae, Ectobiinae, Nyctiborinae, and Pseudophyllodromiinae. Many are associated with human habitations, though others occupy natural including wetlands, grasslands, and forests.

Aglaopteryx gemma by (c) Raven Dandridge, some rights reserved (CC BY), uploaded by Raven Dandridge. Used under a CC-BY license.

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Chorisoneura texensis by no rights reserved, uploaded by Kristi Zoebelein. Used under a CC0 license.

Pronunciation

How to pronounce Ectobiidae: //ɛktəˈbɪiˌaɪdiː//

These audio files are automatically generated. While they are not always 100% accurate, they are a good starting point.

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Habitat

vary widely by and . The Blattellinae include many domestic pests associated with human dwellings. The Ectobiinae are primarily found in Europe, Africa, Asia, and Australia, with some species in natural vegetation. Nyctiborinae are restricted to Mexico, Central and South America. Pseudophyllodromiinae have worldwide distribution. Specific documented habitats include: Cattana Wetlands in Queensland, Australia (Carbrunneria cattana); bases of native grasses on Tablelands (Parectoneura queenslandica); and bromeliad-associated habitats in Chile (Austroectobius invunche with Fascicularia bicolor).

Distribution

Worldwide distribution. Blattellinae: worldwide. Ectobiinae: Europe, Africa, Asia, Australia. Nyctiborinae: Mexico, Central and South America. Pseudophyllodromiinae: worldwide. Specific regional records include: Far North Queensland, Australia; northern Macaronesian Islands, southern Spain, North Africa, Near East (Israel, Cyprus) for Dziriblatta; circum-Mediterranean for Luridiblatta; Isla Grande de Chiloé, Chile; and California, USA for German cockroach studied for resistance. Fossil evidence shows Ectobius lineage in North America (Green River Formation, Colorado, 49 million years ago) before extinction and later reintroduction.

Life Cycle

via (). In Parectoneura queenslandica, ootheca is placed loosely in grasses. German cockroach (Blattella germanica) reproductive cycle: female lays , eggs develop into nymphs, nymphs proceed through series of instars before becoming adults. Under optimal conditions with unlimited resources, one pair of and their offspring can generate 10,000 individuals in one year.

Behavior

in mediated by cuticular hydrocarbons, with specific compounds facilitating group formation and social coordination. Behavioral documented: stimulus-independent avoidance of environments, and stimulus-dependent detection and limitation of exposure to toxic substances before receiving lethal doses. Glucose aversion in some due to genetic changes in peripheral causing bitter receptor stimulation. Some attracted to lights (Johnrehnia notata).

Human Relevance

Contains major household pest , particularly Blattella germanica (German cockroach), which spreads causing gastrointestinal (E. coli, Salmonella, Rotavirus) and produces allergens triggering lung hypersensitivity and asthma. Supella longipalpa (brown-banded cockroach) is another domestic pest. Parcoblatta species (wood cockroaches) occasionally enter buildings. German cockroach show widespread resistance to , fipronil, clothianidin, and other compounds, posing significant challenges to pest management. Consumer-grade residual insecticide sprays show limited efficacy against populations. Research into alternative control methods includes sucralose (artificial sweetener) and potential -based management, though Wolbachia has not been detected in in some studies.

Similar Taxa

BlattidaeLarger body size; Blattidae includes Periplaneta (American cockroach, Oriental cockroach) which are larger than most and have different ecological associations.
BlaberidaeGenerally larger, often wingless or with reduced wings; includes many tropical and the Madagascar hissing (Gromphadorhina portentosa), which has distinct sound-producing not found in .

More Details

Subfamily classification

The File recognizes five : Blattellinae (worldwide), Ectobiinae (Europe, Africa, Asia, Australia), Nyctiborinae (Mexico, Central and South America), Pseudophyllodromiinae (worldwide), and Anaplectinae (now elevated to level). include Ectobius, Blattella, Parcoblatta, Supella, Pseudomops, and many others.

Insecticide resistance

German cockroach in California and elsewhere show broad-spectrum resistance to most major classes including , fipronil, clothianidin, indoxacarb, and hydramethylnon. Abamectin remains effective in some populations. Resistance mechanisms include metabolic detoxification, target-site insensitivity, and behavioral avoidance. This resistance poses significant challenges to urban pest management and public health.

Fossil record and biogeography

Ectobius, a major textbook example of an organism, has a fossil history in 44-million-year-old Baltic amber. The was believed to be exclusively Old World, but 49-million-year-old Ectobius fossils from the Green River Formation in Colorado demonstrate a North American origin with subsequent extinction and later human-mediated reintroduction.