Brachiacantha subfasciata
Mulsant, 1850
Semi-banded Spurleg
Brachiacantha subfasciata is a small lady beetle (Coccinellidae) measuring 3.50–4 mm in length. It is distinguished by in pronotum coloration and a characteristic orange band on black . The occurs in Central America and North America, with records from Arizona, Texas, and Mexico. It belongs to the dentipes group of Brachiacantha, a taxonomically revised clade of Neotropical and Nearctic lady beetles.
Pronunciation
How to pronounce Brachiacantha subfasciata: /ˌbrækiəˈkænθə ˌsʌbfæsiˈɑːtə/
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Identification
Small size (under 4 mm) and orange elytral band on black background distinguish this from many other Coccinellidae. The sexually dimorphic pronotum—males with yellow margin and anterolateral angle, females predominantly black—provides a diagnostic feature. The combination of yellow and banded separates it from unbanded or differently patterned Brachiacantha species. Confirmation may require reference to the dentipes group key in taxonomic literature.
Images
Distribution
Central America and North America. Documented from Arizona and Texas in the United States, and from Mexico. New Neotropical localities have been added in recent taxonomic revisions.
Similar Taxa
- Other Brachiacantha speciesMany share small size and dark coloration with contrasting markings; B. subfasciata is distinguished by the specific pattern of orange band and sexually dimorphic pronotum
- Unbanded or spot-patterned CoccinellidaeThe transverse orange band on black contrasts with spotted or unmarked in similar size range
More Details
Taxonomic history
Described by Mulsant in 1850. Included in the dentipes group of Brachiacantha, which has undergone recent taxonomic revision including synonymization of related forms and updated distribution records.