Basilia

Miranda-Ribeiro, 1903

bat flies

Species Guides

Basilia boardmani(southeastern myotis bat fly)
Basilia forcipata

Basilia is a of ectoparasitic bat flies in the Nycteribiidae. These highly specialized dipterans are obligate of bats, exhibiting extreme morphological adaptations for life on mammalian . The genus includes such as Basilia silvae and Basilia ortizi, which have been documented from South and Central America. Members of this genus are characterized by reduced or absent wings, dorsoventrally flattened bodies, and claws adapted for clinging to host fur.

Pronunciation

How to pronounce Basilia: //bəˈsɪliə//

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

Identification

Basilia can be distinguished from other nycteribiid by abdominal tergite , particularly the two-lobed margin of tergite II in the ferruginea species group. Identification to species level requires examination of genitalia and comparison with specialized keys (e.g., Guimarães and D'Andretta, 1956). Molecular identification via COI sequences is available for some species.

Habitat

Strictly associated with bat roosts and animals. Recorded from diverse ecoregions including Chilean Matorral, Valdivian temperate forest, and tropical regions of Central America. Climate associations range from temperate Mediterranean pluvial-seasonal to temperate-oceanic bioclimates.

Distribution

Neotropical region: Chile (Santiago City, Chillán, Araucanía region), Honduras (new record of B. ortizi). GBIF indicates additional records from Norway and Sweden, though these may represent data quality issues or misidentifications requiring verification.

Host Associations

Myotis arescens - Documented for B. silvae in Chile
Histiotus - Original description for B. silvae (1913)
Histiotus montanus - Documented per Muñoz et al., 2001

Behavior

Ectoparasitic; clings to fur using specialized claws. Collected from host pelage using fine forceps during brief examination intervals. Highly host-specific with limited mobility off-host.

Similar Taxa

TrichobiusAlso nycteribiid bat flies; distinguished by different abdominal tergite structure and associations
StreblaStreblid bat flies; -level distinction based on morphological characters including wing venation and body form

More Details

Taxonomic Note

placement varies in literature: treated as Nycteribiidae in iNaturalist and NCBI, but as Hippoboscidae ( Nycteribiinae) in Catalogue of Life and GBIF. This reflects historical classification differences rather than substantive disagreement.

Research Priority

The remains poorly studied with high potential for new discovery, particularly in under-sampled regions like La Mosquitia, Honduras. First COI sequences were generated only recently (2024) for B. silvae.