Orthocentrinae

Genus Guides

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Orthocentrinae is a of within Ichneumonidae. The group is among the least-studied ichneumonid subfamilies despite representing a major component of tropical faunas. At least 29 are recognized, with substantial undescribed diversity in the Neotropics. Recent surveys in Brazil and Mexico have revealed far exceeding previous estimates.

Orthocentrinae by (c) Steve Kerr, some rights reserved (CC BY), uploaded by Steve Kerr. Used under a CC-BY license.Orthocentrus by (c) Will Kuhn, some rights reserved (CC BY), uploaded by Will Kuhn. Used under a CC-BY license.

Pronunciation

How to pronounce Orthocentrinae: /ˌɔrθoʊˈsɛntrɪniː/

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Identification

Small to minute ichneumonid wasps. Members of this can be distinguished from other ichneumonids by a combination of morphological characters including reduced wing venation and specific antennal features, though precise identification requires examination of detailed morphological keys. Generic-level identification is facilitated by keys available for regional faunas such as Brazil and Mexico.

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Habitat

Found in tropical and subtropical forests, with highest documented diversity in wet lowland tropical forests. In Brazil, occurs in Atlantic tropical forest at elevations ranging from lowland to high mountain chains. Also present in dry forests and savannahs, though these remain understudied.

Distribution

Widespread in the Neotropics with high diversity in Mexico, Central America, and Brazil. Documented from Atlantic tropical forest in southeastern Brazil and throughout Mexican montane regions. Global distribution extends beyond the Americas but precise range boundaries remain poorly documented due to taxonomic understudy.

Host Associations

  • fungus gnats (Mycetophilidae and Sciaridae) - koinobiont associations documented in literature cited by taxonomic sources but not explicitly detailed in provided source texts. Orthocentrinae are known of dipteran larvae in these .

Behavior

Koinobiont development on .

Ecological Role

regulating of fungus gnat larvae in forest .

Similar Taxa

  • other Ichneumonidae subfamiliesDistinguished by reduced wing venation, small body size, and specific antennal ; identification requires use of specialized keys.

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Sources and further reading