Gasterophilus inermis (Braurer, 1858)

Li, Xin-Yu, Pape, Thomas & Zhang, Dong, 2019, Taxonomic review of Gasterophilus (Oestridae, Gasterophilinae) of the world, with updated nomenclature, keys, biological notes, and distributions, ZooKeys 891, pp. 119-156 : 119

Gasterophilus inermis (Braurer, 1858) Figs 1 G–I , 4E, F , 7 G–I , 10C , 11 G–I , 14 G–I , 17 I–L ; Table 1

Gastrus inermis Brauer, 1858: 464. Type locality: Austria, Neusiedlersee, Jois (as "auf der Rossweide bei Gyois am Neusiedlersee").

Selected references.

Brauer (1863: 73); Zumpt (1965: 124); Grunin (1969: 44); Soós and Minář (1986: 238); Cogley (1991b); Xue and Wang (1996: 2209); Otranto et al. (2005); Colwell et al. (2006: 36); Li et al. (2018, 2019); Yan et al. (2019).

Diagnosis.

Facial plate bare. Wing partly infuscate, with darkened patches with ill-defined edges. Distance between crossveins r-m and dm-cu less than length of r-m. Meron bare. Legs yellowish brown, with femora distinctly darkened. Abdomen ground color yellow. Male cercus short and broad, length/width ratio equal or less than 1.0; surstylus yellow, with a rounded apex; processi longi tubercular. Female sternite 8 longitudinally ridged in the middle and with a scallop-shaped apex.

Type material examined.

Syntypes of Gastrus inermis Brauer, 1858. AUSTRIA • 1♂, 1♀; no further data; NHMW [from photo].

Additional material examined.

AUSTRIA • 1♀; no locality data; 31 Jul. 1986; Waldegg leg.; NHMW [from photo] • 1♂; 1892; no further data; NHMW [from photo]. ROMANIA • 1♂, 1♀; G. Dinulescu leg.; no further data; MNHN. GERMANY • 1♂, 1♀; 1918; Wüstnei leg.; no further data; NHMD. CHINA - Inner Mongolia • 1♂; Chifeng, Zhaowuda League, Right Banner; 16 Aug. 1969; collector unknown; IOZ • 1♀; locality as for preceding; 22 Aug. 1969; IOZ.

Hosts.

Burchell’s zebra ( E. quagga burchellii), domestic horse ( E. ferus caballus), Mongolian wild ass ( E. hemionus hemionus), wild horse ( E. przewalskii ).

Distribution.

Afrotropical - Senegal, South Africa. Nearctic - USA (Illinois). Palaearctic - Austria, China (Inner Mongolia, Xinjiang), Germany, Hungary, Iran, Italy, Kazakhstan, Kyrgyzstan, Romania, Mongolia, Moldova, Slovak Republic, Tajikistan, Turkmenistan, Ukraine, Uzbekistan.

Remarks.

Brauer (1858: 465) explicitly states that he examined "one pair" of adults that were hatched from puparia collected by the Austrian entomologist Alois Friedrich Rogenhofer in horse dung. 1♂, 1♀ in NHMW each carry two labels with the information "Oesterreich / Coll. Brauer" and "inermis / det Brauer". A fragment of a puparium carries labels with "Gastrus / inermis / det Brauer" and "Coll. Brauer". We consider the pair of adults to most probably represent original syntypes, but we are deliberately abstaining from designating a lectotype at this time.

Figures

Figure 1. Left lateral view of habitus (A, D, G), head and thorax (B, E, H), and head in frontal view (C, F, I) of male Gasterophilus species, modified from Li et al. (2019) A-C G. flavipes (Olivier); Morocco (in IOZ) D-F G. haemorrhoidalis (Linnaeus); China (in MBFU) G-I G. inermis (Brauer); Germany (in NHMD). Scale bars: 1 mm (A, D, G); 0.5 mm (B, C, E, F, H, I).

Figure 4. Dorsal view of habitus (A, C, E) and head and thorax (B, D, F) of male Gasterophilus species, modified from Li et al. (2019) A, B G. flavipes (Olivier) C, D G. haemorrhoidalis (Linnaeus) E, F G. inermis (Brauer). Scale bars: 1 mm (A, C-D, E); 0.5 mm (B, F).

Figure 7. Dorsal view (A, D, G) and left lateral view (B, E, H) of habitus, and head in frontal view (C, F, I) of female Gasterophilus species, modified from Li et al. (2019) A-C G. flavipes (Olivier); China (in MBFU) D-F G. haemorrhoidalis (Linnaeus); China (in MBFU) G-I G. inermis (Brauer); Germany (in NHMD). Scale bars: 1 mm (A, B, D, E, G, H); 0.5 mm (C, F, I).

Figure 10. Wing of Gasterophilus species, with A-C modified from Li et al. (2019) A G. flavipes (Olivier) B G. haemorrhoidalis (Linnaeus) C G. inermis (Brauer) D G. intestinalis E G. meridionalis (Pillers & Evans) F G. nasalis (Linnaeus) G G. nigricornis (Loew) H G. pecorum (Fabricius) I G. ternicinctus Gedoelst. Scale bars: 0.5 mm (A-C); 1 mm (D-I).

Figure 11. Anterior (A, D, G), left lateral (B, E, H) and posterior view (C, F, I) of male terminalia of Gasterophilus species, modified from Li et al. (2019) A-C G. flavipes (Olivier) D-F G. haemorrhoidalis (Linnaeus) G-I G. inermis (Brauer). Scale bars: 0.5 mm (A-I). The dotted line in C and F indicates the sagittal plane. Abbreviations: cer, cercus; ph, phallus; pog, postgonite; pr l, processi longi; sur, sustylus.

Figure 14. Dorsal (A, D, G), left lateral (B, E, H) and ventral (C, F, I) view of female genitalia of Gasterophilus species, modified from Li et al. (2019) A-C G. flavipes (Olivier) D-F G. haemorrhoidalis (Linnaeus) G-I G. inermis (Brauer). Scale bars: 0.5 mm (A-C); 1 mm (D-I). Abbreviations: cer, cercus; epi, epiproct; sg 7, segment 7; sl, stalk-like pedicel; st 8, sternite 8; tg 8, tergite 8.

Figure 17. Right lateral (A, E, I, M) and ventral (B, F, J, N) view, micropyle (C, G, K, O) and ultrastructural details of plastron (D, H, L, P) of eggs in Gasterophilus species A-D G. flavipes (Olivier) E-H G. haemorrhoidalis (Linnaeus) I-L G. inermis (Brauer) M-P G. intestinalis. Abbreviations: api, apical; dor, dorsal; ven, ventral. Scale bars: 100 μm (A, B, I-J, M, - N), 50 μm (in box of B), 100 μm (in box of I); 20 μm (C); 5 μm (D); 250 μm (E, F), 20 μm (in box of F); 50 μm (G, O); 25 μm (H); 10 μm (K, L, P).