Stegana
Meigen, 1830
vinegar flies
Species Guides
2Stegana is a of vinegar flies (Drosophilidae) comprising at least 140 described . The genus is characterized by high morphological conservatism, particularly in the subgenus Orthostegana, where evolutionary stasis has produced numerous cryptic species that are difficult to distinguish by external alone. Species delimitation often requires integrative approaches combining molecular data (mitochondrial COI and ND2 genes) with detailed morphological analysis.
Pronunciation
How to pronounce Stegana: //stɛˈɡɑːnə//
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Identification
Accurate identification of Stegana , especially within subgenus Orthostegana, is challenging due to pronounced morphological conservatism and cryptic . External alone is often insufficient; integrative methods combining molecular markers (COI and ND2 mitochondrial genes) with morphological examination are required for reliable species delimitation.
Images
Distribution
Documented from Asia (particularly Southwest China including Yunnan), Europe (Denmark, Norway, Sweden), and the Neotropics. The Asian Orthostegana lineage has been studied intensively, with nine new described from Southwest China in recent integrative taxonomic work.
Similar Taxa
- DrosophilaBoth are of vinegar flies in Drosophilidae; Stegana is distinguished by placement in Steganinae versus Drosophilinae
- AmiotaAnother in Steganinae; Stegana (S. biprotrusa, S. castanea, S. coleoptrata, S. nigrolimbata, S. ornatipes, S. shirozui, S. undulata) provide structural framework for identification
Sources and further reading
- BugGuide
- Wikipedia
- GBIF taxonomy match
- iNaturalist taxon
- NCBI Taxonomy
- Catalogue of Life
- Integrative species delimitation in the morphologically conservative Stegana subgen. Orthostegana (Diptera, Drosophilidae)
- Figure 1 from: Wang Y-L, Peng Z-Q, Jin F-L, Chen H-W, Huang J (2023) Integrative species delimitation in the morphologically conservative Stegana subgen. Orthostegana (Diptera, Drosophilidae). Arthropod Systematics & Phylogeny 81: 581-610. https://doi.org/10.3897/asp.81.e102683
- Figure 4 from: Wang Y-L, Peng Z-Q, Jin F-L, Chen H-W, Huang J (2023) Integrative species delimitation in the morphologically conservative Stegana subgen. Orthostegana (Diptera, Drosophilidae). Arthropod Systematics & Phylogeny 81: 581-610. https://doi.org/10.3897/asp.81.e102683
- Figure 3 from: Wang Y-L, Peng Z-Q, Jin F-L, Chen H-W, Huang J (2023) Integrative species delimitation in the morphologically conservative Stegana subgen. Orthostegana (Diptera, Drosophilidae). Arthropod Systematics & Phylogeny 81: 581-610. https://doi.org/10.3897/asp.81.e102683
- Figure 11 from: Wang Y-L, Peng Z-Q, Jin F-L, Chen H-W, Huang J (2023) Integrative species delimitation in the morphologically conservative Stegana subgen. Orthostegana (Diptera, Drosophilidae). Arthropod Systematics & Phylogeny 81: 581-610. https://doi.org/10.3897/asp.81.e102683
- Figure 16 from: Wang Y-L, Peng Z-Q, Jin F-L, Chen H-W, Huang J (2023) Integrative species delimitation in the morphologically conservative Stegana subgen. Orthostegana (Diptera, Drosophilidae). Arthropod Systematics & Phylogeny 81: 581-610. https://doi.org/10.3897/asp.81.e102683
- Cryptic diversity in the subgenus Oxyphortica (Diptera, Drosophilidae, Stegana).