Rhyparochromidae

Amyot & Serville, 1843

Dirt-colored Seed Bugs, seed bugs

Subfamily Guides

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Rhyparochromidae is a large of true bugs (Hemiptera: Heteroptera) comprising over 2,100 described across more than 420 . Members are commonly known as dirt-colored seed bugs, reflecting their typically brown or mottled appearance. The family contains two : the small Plinthisinae (2 genera) and the diverse Rhyparochrominae (14 tribes, >400 genera). Formerly classified as a subfamily of Lygaeidae, Rhyparochromidae was elevated to family rank based on phylogenetic studies. The family exhibits considerable ecological diversity, with species found in tropical to temperate worldwide and some showing specialized associations with ants or particular plants.

Myodocha annulicornis by no rights reserved, uploaded by Lyn Roueche. Used under a CC0 license.Paragonatas divergens by (c) Annika Lindqvist, some rights reserved (CC BY), uploaded by Annika Lindqvist. Used under a CC-BY license.Valtissius diversus by (c) Justin Williams, some rights reserved (CC BY), uploaded by Justin Williams. Used under a CC-BY license.

Pronunciation

How to pronounce Rhyparochromidae: /ˌraɪpəroʊˈkrɒmɪdiː/

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Images

Habitat

Rhyparochromidae occupy diverse ranging from tropical rainforests to cool temperate regions. The tribe Cleradini is generally found in tropical habitats, though at least one species (Laticlerada tasmanica) occurs in cool temperate Tasmania. The Australian Megadrymus occurs in subtropical and tropical wet and dry rainforest on eastern and northern coasts. Some species are associated with specific microhabitats: Pulmomerus levatus has been found under leaf litter of Ficus palmeri in Baja California, and Scolopostethus pacificus occurs near nests of the velvety tree ant Liometopum occidentale.

Distribution

The has a worldwide distribution. Documented occurrences include: North America (Arizona, Florida, Quebec, Vermont), Mexico (Baja California, Guerrero), Central America, South America, the Caribbean, Africa (South Africa, widespread across continent for Stalaria), Europe (Denmark, Sweden, Hungary, widespread Palearctic for some ), the Middle East (Turkey/Amasya Province, with 40 species recorded), Asia (India, Thailand, Laos, Burma, Malaysia, Indonesia, New Guinea, northeastern India), and Australia (tropical northern Australia, Tasmania, eastern and northern coasts). The Palearctic-native Scolopostethus affinis has established as an species in North America (Quebec). Paromius gracilis is broadly distributed in the Afrotropical region and subtropical parts of Eurasia.

Human Relevance

Some have established outside their native ranges as species. Scolopostethus affinis, native to the Palearctic, is now established and breeding in Quebec, representing a new alien species in North America. The has been the subject of extensive taxonomic revision due to historical confusion with Lygaeidae.

Similar Taxa

  • LygaeidaeRhyparochromidae was formerly classified as a of Lygaeidae and shares general ; distinguished by phylogenetic relationships and subtle morphological characters including fore femoral structure and male genitalia features
  • PentatomidaeBoth contain seed-feeding true bugs with similar overall body plan; Rhyparochromidae typically lack the shield-shaped body and prominent triangular scutellum characteristic of stink bugs

Sources and further reading