Ceromya
Robineau-Desvoidy, 1830
Ceromya is a of tachinid flies in the Tachinidae, tribe Siphonini. The genus contains approximately 60 described distributed across multiple continents. Nine species are recognized in the Nearctic region, organized into three species groups with distinct biogeographic patterns: the bicolor group (Holarctic), flaviseta group (European-Nearctic), and americana group (Neotropical-Nearctic). The genus was established by Robineau-Desvoidy in 1830.
Pronunciation
How to pronounce Ceromya: /sɛˈroʊmiə/
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Identification
Nearctic can be identified using the key provided in O'Hara (1994), which separates the nine regional species based on taxonomically useful morphological features. The three species groups are distinguished by characteristic combinations of traits, with the bicolor group including the Holarctic C. bicolor, the flaviseta group containing C. ontario and C. palloris, and the americana group comprising six species including C. americana, C. balli, C. elyii, C. flava, C. oriens, and C. occidentalis. Diagnostic illustrations of key features are available for species-level identification.
Distribution
The has a broad distribution spanning the Nearctic, Palearctic, Neotropical, and Oriental regions. In the Nearctic region, nine are recognized with type localities in Quebec (Masham Township) and British Columbia (Lakelse Lake), Canada. The bicolor group has a Holarctic distribution (Old World and Nearctic), the flaviseta group has a European-Nearctic distribution, and the americana group has a Neotropical-Nearctic distribution.
More Details
Species Groups
Nearctic are arranged into three hypothesized monophyletic species groups: bicolor-group, flaviseta-group, and americana-group. Each group contains extralimital members beyond the Nearctic region.
Taxonomic History
The was revised by O'Hara in 1994, who described four new Nearctic and corrected published records for known species.