Dexia vacua ( Fallén, 1817 )
publication ID |
11755334 |
DOI |
https://doi.org/10.5281/zenodo.5295313 |
persistent identifier |
https://treatment.plazi.org/id/03F05F0B-4B64-FFE0-5CC5-0E1AAD43FC7C |
treatment provided by |
Felipe |
scientific name |
Dexia vacua ( Fallén, 1817 ) |
status |
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Figs. 85−88
Musca vacua Fallén, 1817: 240 .
Dexia cincta Robineau-Desvoidy, 1830: 312 . — Herting 1974: 40 (as syn. of D. vacua ).
Dexia gracilis Robineau-Desvoidy, 1830: 313 View in CoL . — Robineau-Desvoidy 1863b: 389. — Herting 1974: 40 (as syn. of D. vacua ).
Dexia aurinia Walker, 1849: 847 . — Austen 1907: 343 (as syn. of D. vacua ). — Crosskey 1974: 292, 305 (type material, junior syn. of D. vacua ).
Dexia vacua: Macquart, 1835: 212 . — Zetterstedt 1844: 1265, 1859: 6173. — Rondani 1862: 76. — Robineau- Desvoidy 1863b: 388. — Pandellé 1896: 160. — Bezzi & Stein 1907: 446. — Stein 1924: 238. — Lundbeck 1927: 270. — Emden 1954: 30. — Sabrosky & Arnaud 1965: 982 (catalog). — Kolomiets 1970: 61, 67 (key and redescription). — Mesnil 1980: 47 (redescription) — Herting 1984: 144 (catalog). — Richter & Farinets 1983: 816 (1st instar larva). — Chao & Liang 1992: 806 (key), misidentification. — Herting & Dely-Draskovits 1993: 366 (catalog). — Tschorsnig & Herting 1994: 81, 157. — Chao et al. 1998: 2154, misidentification. — Richter 2004: 355 (key). — Shi 2004: 90 (misidentification). — Chao et al. 2009: 576 (fauna), misidentification.
Diagnosis. Prementum 2.5−3 times as long as wide; 3 presutural and 3 postsutural dorsocentral setae; 2 katepisternal setae; tegula and legs reddish yellow; abdomen reddish yellow, entirely with grayish white pruinosity; syntergite 1+2 without median marginal setae.
Description. Mesnil (1980) redescribed this species in detail. Here we give some additional measurements and diagnostic characters.
Body length. 7.5−9.8 mm.
Male. Head with grayish white pruinosity. Frons about 0.14 times as wide as head width; parafacial about twice as wide as 1st flagellomere; facial carina weakly developed, low and pointed on ridge; gena about 0.4 times as wide as eye height; ocellar seta as strong as upper frontal setae; fine inner vertical seta 0.25−0.36 times as long as eye height, slightly shorter than ocellar seta; 1st flagellomere 2−3.5 times as long as pedicel; total width of arista including plumosity 2−4 times as wide as 1st flagellomere; prementum 2.5−3 times as long as wide; palpus about as long as 1st flagellomere. Thorax with 4 narrow longitudinal dark brown vittae, an inner vitta about 1/5 and outer one about 1/3 as wide as pruinose portion between inner and outer vittae on presutural scutum; scutellum reddish yellow at apex. Proepisternum bare; 1 presutural and 1−2 postsutural acrostichal setae; 3 presutural and 3 postsutural dorsocentral setae; 1−2 postsutural intra-alar setae; 2−3 supraalar setae; 2 katepisternal setae. Wing brownish, tegula reddish yellow, basicosta brown to dark; costal spine about 1.5 times as long as crossvein r-m. Lower calypter with long fringe on outer margins. Legs reddish yellow, claws and pulvilli about as long as tarsomere 5; mid tibia with 2−3 posterodorsal setae; hind tibia with 2−3 anterodorsal, 2 posterior and 2−3 ventral setae. Abdomen reddish yellow in ground color, widely black on mid-dorsal longitudinal portion, and black on posterior margin of tergites 3 to 5; dorsum entirely covered with grayish white pruinosity, sometimes broadly bare on posterior sides of tergite 3. Syntergite 1+2 with a lateral marginal seta, without median marginal setae; tergite 3 with 2 pairs of median discal, 1 pair of median marginal and 2 lateral marginal setae; tergite 4 with 2 pairs of median discal and a row of marginal setae; tergite 5 with some discal and a row of marginal setae. Male terminalia. Posteror lobe of sternite 5 rounded apically; apical half of cerci slender, pointed at apex; surstylus long and wide, pointed apically; postgonite distinctly shorter than basiphallus.
Female. Frons about 0.38 times as wide as head width; gena 0.6−0.7 times as wide as eye height; 7−8 inclinate frontal setae; 2 strong proclinate orbital setae; 1 upwardly directed prevertical seta; inner vertical seta longer than ocellar seta and as long as upper frontal setae. Thorax with gray pruinosity. Abdomen entirely covered with grayish white pruinosity; tergites 3 with 1 pair of median discal setae, tergite 4 with or without discal setae; tergite 5 without discal setae, some median setae of marginal setae shifted forward. Other characters almost same as in male.
Type material. Syntypes of Musca vacua Fallén , Sweden ( SMNH) (not examined) .
Material examined. FRANCE. 1 male, 1 female, St. Germain , 11−21.vii.−viii.1951, H.L. Parker, B. Herting det. ( CNC) . SWEDEN. 1 male, Grisslehamn , 2.viii.1925 , Hedqren ; 1 male, Ustharnmea , 31.vii.1935, Hedqren, Bergström det. ( SMNH) .
Distribution.? China; Europe (northwards to Sweden); Russia (North European territory).
Remarks. This species has long been known from Europe and recently found in East Asia. It is similar to D. ventralis , but differs from it in having an undeveloped facial carina and almost entirely grayish white pruinosity on abdominal tergites in male. Chao et al. (1998: 2154), Shi (2004: 90) and Chao et al. (2009: 576) probably misidentified Chinese specimens of D. ventralis as D. vacua .
Host. Scarabaeidae : Serica brunnea L. ( Tschorsnig & Herting 1994: 157).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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Dexia vacua ( Fallén, 1817 )
Zhang, Chun-Tian, Shima, Hiroshi & Chen, Xiao-Lin 2010 |
Dexia aurinia
Crosskey, R. W. 1974: 292 |
Austen, E. E. 1907: 343 |
Walker, F. 1849: 847 |
Dexia vacua:
Chao, C. - M. & Liang, E. - Y. & Zhou, S. - X. 2009: 576 |
Richter, V. A. 2004: 355 |
Shi, Y. - S. 2004: 90 |
Chao, C. - M. 1998: 2154 |
Tschorsnig, H. - P. & Herting, B. 1994: 81 |
Herting, B. & Dely-Draskovits, A. 1993: 366 |
Chao, C. - M. & Liang, E. - Y. 1992: 806 |
Herting, B. 1984: 144 |
Richter, V. A. & Farinets, S. I. 1983: 816 |
Mesnil, L. P. 1980: 47 |
Kolomiets, N. G. 1970: 61 |
Sabrosky, C. W. & Arnaud, P. H., Jr. 1965: 982 |
Emden, F. I. van 1954: 30 |
Lundbeck, W. 1927: 270 |
Stein, P. 1924: 238 |
Bezzi, M. & Stein, P. 1907: 446 |
Pandelle, L. 1896: 160 |
Rondani, C. 1862: 76 |
Zetterstedt, J. W. 1859: 6173 |
Zetterstedt, J. W. 1844: 1265 |
Macquart, J. 1835: 212 |
Dexia cincta
Herting, B. 1974: 40 |
Robineau-Desvoidy, J. B. 1830: 312 |
Dexia gracilis
Herting, B. 1974: 40 |
Robineau-Desvoidy, J. B. 1863: 389 |
Robineau-Desvoidy, J. B. 1830: 313 |
Musca vacua Fallén, 1817: 240
Fallen, C. F. 1817: 240 |