Betasyrphus
publication ID |
https://doi.org/ 10.5281/zenodo.294068 |
DOI |
https://doi.org/10.5281/zenodo.5624823 |
persistent identifier |
https://treatment.plazi.org/id/03B587BB-FFBB-2466-FF17-1352191FD6FF |
treatment provided by |
Plazi |
scientific name |
Betasyrphus |
status |
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Other Betasyrphus View in CoL View at ENA species studied
B. stuckenbergi ( Keiser, 1971) View in CoL : Ƥ: “ Typus [red label, Holotype] \ Manjakatompo, 1700 m \ Madagascar Centre, det Ambatolampy, 11 – 15.XII [19]57, B. Stuckenberg \ Metasyrphus (Betasyrphus) stuckenbergi Keiser [handwritten] \ Muséum Paris, Betasyrphus stuckenbergi, Keiser 1971 View in CoL ”, approx. 19°20’S, 47°26’E (MNHN); Ƥ: “ Paratypus ” [red label], same locality and labels as holotype, “ Natal Museum Type no. 1582 \ Natal Museum, Piertermaritzburg, South Africa [green label]” (NMSA); Ƥ: Fianarantsoa Prov., Belle Vue, 1.2 km S Ramonafana Nat’l Park entrance, malaise in rainforest 28.XI / 6.XII.2001, 1095 m.A. Harin’Hala, ME Irwin, 21°15.99’ S, 47° 25.21 E, MG 90_05” (CAL) [this is a very dark and shrivelled female, that corresponds in all major morphological characters of Table 1 View TABLE 1 with the type specimen of B. stuckenbergi View in CoL . However the face including middle knob is dark yellow to brownish and the frons is blackish].
B. serarius ( Wiedemann, 1830) View in CoL : type material Ƥ: Mus. Westerm. \ Type [red label]”; [head glued separately on a card on the same pin] (ZMUC); Ƥ: “Mus. Westerm. \ S. serarius Wied. View in CoL , China, Trentepohl Type [red label] \ Betasyphus serarius Wied. Det. F.C. Thompson 1924 \ Lectoptype Syrphus serarius Wiedemann K.D. Ghorpade View in CoL des. 1980 \ not type!“ (ZMUC); Both specimen here considered as syntypes. Additional type material in the Wiedemann collection was not available for study.
continued next page Mouth margin On sides partly Side margin yellow completely yellow Side margin dark Side margin yellow brown to black usually dark brown to black
Betasyrphus View in CoL | B. keiseri View in CoL sp. n. 3 | B. keiseri View in CoL sp. n. Ƥ | B. stuckenbergi View in CoL Ƥ | B. serarius View in CoL 3 | B. serarius Ƥ View in CoL |
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Origin of examined material | Madagascar | Madagascar | Madagascar | Japan, Korea Australia u.a. | Japan, Korea China (syntypes) |
Wing, microtrichia- coverage | Cover high: at least apical ½ of wing including R4+5 fully, microtrichose; Alula completely microtrichose | Cover high: at least apical ½ of wing including R4+5 fully, microtrichose; Alula completely microtrichose | Cover high: at least apical ½ of wing including R4+5 fully, microtrichose; Alula completely microtrichose | Cover high: at least apical ½ of wing including R4+5 fully, microtrichose; Alula completely microtrichose | Cover high: at least apical ½ of wing including R4+5 fully, microtrichose (a small bare patch in type specimen); Alula completely microtrichose |
Pterostigma | homogenous yellow to slightly brownish, at most inner border line darker | homogenous yellow to slightly brownish, at most inner border line darker | homogenous yellow | bicoloured: basally distinctly dark – brownish | bicoloured: basally distinctly dark – brownish |
Wing colour | slight brownish tinge in the middle part (most males, some males indistinct or hyaline) | slight brownish tinge in the middle part, in about half of females, others homogenous, clear | hyaline, but anterior part of wing with a yellowish tinge | homogenous, hyaline | homogenous, hyaline |
Wing, veins | veins mostly brownish to black, especially in apical part of the wing | veins mostly brownish to black, especially in apical part of the wing | veins yellow including costa near pterostigma | veins mostly brownish to black | veins mostly brownish to black |
Facial tubercle | yellow no difference to facial ground colour, but sides of face silvery pollinose | yellow no difference to facial ground colour, but sides of face silvery pollinose | yellow no difference to facial ground colour, but sides of face silvery pollinose | black or brownish darkened, differing distinctly from colour of the sides of the face, usually black median vitta reaching mouth margin | black or brownish darkened, differing distinctly from colour of the sides of the face |
Long hairs on scutellum | basally yellow, on apical half mainly dark hairs | basally yellow, on apical half mainly dark hairs | mainly yellow | black | black |
Hairs on side of the face below antennae | black | black and yellow to brown hairs may be intermixed | completely yellow | black | black |
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Kingdom |
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Phylum |
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Class |
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Order |
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Family |
Betasyrphus
Ssymank, Axel 2010 |
B. stuckenbergi (
Keiser 1971 |
Betasyrphus stuckenbergi
Keiser 1971 |
Betasyphus serarius
Wied. Det. F.C. Thompson 1924 |
B. serarius (
Wiedemann 1830 |