Macrocentrus nigridorsis

The specific epithet 'nigridorsis' (from Latin 'niger' = black, 'dorsum' = back) indicates a dark or black dorsal coloration that distinguishes this species from some congeners. Macrocentrus species generally exhibit elongated bodies with long, multi-segmented antennae and reduced wing venation. Positive identification requires examination of morphological characters including wing venation patterns, antennae segment counts, and genitalic structures, preferably by comparison with type specimens or specialist keys.

The species has been documented from North America based on the original description and limited subsequent records. Specific locality data are sparse.

As a member of Braconidae, this species likely functions as a parasitoid, potentially contributing to natural regulation of lepidopteran populations. The genus Macrocentrus as a whole is recognized for biological control applications against pest moths.

Direct economic or medical significance has not been documented for this species. Related Macrocentrus species, particularly M. ancylivorus, have been employed in classical biological control programs against tortricid pests.

• Macrocentrus ancylivorusA well-known congener used in biological control; M. nigridorsis differs in dorsal coloration (dark vs. typically lighter in M. ancylivorus) and likely allopatric or parapatric distribution.
• Other Macrocentrus speciesNumerous congeners share general body plan and parasitoid lifestyle; reliable separation requires detailed morphological examination of wing venation, antennae, and male genitalia.

• parasitoid
• Braconidae
• Hymenoptera
• North America
• data deficient

• BugGuide
• GBIF taxonomy match
• iNaturalist taxon
• Catalogue of Life