Fig 1.
Adults of A. asiaticus (A, B) and C. villosulum (C, D). Scale bars: (A, B, C,D) = 5 mm.
Fig 2.
Morphological characteristics of antennae of A. asiaticus and C. villosulum.
(A) Scape (Sc) and Pedicel (Pe) of male A. asiaticus. (B) Scape (Sc) and Pedicel (Pe) of male C. villosulum. (C) View of the 2nd flagellomere of female A. asiaticus. (D) View of the 2nd flagellomere of female C. villosulum. (E) View of the 4th flagellomere of female A. asiaticus. (F) View of the 4th flagellomere of female C. villosulum. (G) View of the 9th flagellomere of male A. asiaticus. (H) View of the 9th flagellomere of male C. villosulum. Scale bars: (A, E) = 1000 μm; (B, C, F, G, H) = 500 μm; (D) = 300 μm.
Fig 3.
General morphological characteristics of antennae of A. asiaticus and C. villosulum.
Scale bars just for the general morphological characteristics of antenna: (A, B, C, D) = 2 mm.
Table 1.
Length (μm) and width (μm) of spine of both sexes in A. asiaticus.
Table 2.
Length (mm) and width (mm) of antennal segments of both sexes in A. asiaticus and C. villosulum.
Fig 4.
Number and distribution of sensilla on the antennae of different segments of both sexes of A. asiaticus and C. villosulum (mean ± SE, n = 5).
Table 3.
Morphological characteristics of the antennal sensilla of both sexes in A. asiaticus and C. villosulum.
Fig 5.
Number and distribution of SCh (I, II, III, IV) on different segments of antennae in both sexes of A. asiaticus and C. villosulum (mean ± SE, n = 5).
D, dorsal side. V, ventral side. Different letters in each column indicated significant difference at 0.05 level using Tukey’s test among sensillium on various segments of antennae.
Fig 6.
The morphology of sensilla chaetica on the antennae of A. asiaticus and C. villosulum.
(A) SCh I and SCh III of A. asiaticus. (B) SCh II and SCh IV of A. asiaticus. (C) SCh IV of A. asiaticus. (D) SCh I and SCh III of C. villosulum. (E) SCh II of C. villosulum. (F) SCh IV of C. villosulum. Scale bars: (D) = 500 μm; (A) = 400 μm;(B) = 100 μm;(E, F) = 50 μm; (C) = 40 μm.
Fig 7.
Number and distribution of ST, SB, Bb, SCa on different segments of antennae in both sexes of A. asiaticus and C. villosulum (mean ± SE, n = 5).
D, dorsal side. V, ventral side. Different letters in each column indicated significant difference at 0.05 level using Tukey’s test among sensillium on various segments of antennae.
Fig 8.
The morphology of ST, Bb and SCa on antennae of A. asiaticus and C. villosulum.
(A) ST I of A. asiaticus. (B) ST I of C. villosulum. (C) T Bb of C. villosulum. (D) ST II of A. asiaticus. (E) ST II of C. villosulum. (F) Bb of A. asiaticus. (G, H, I) SCa of C. villosulum. Scale bars: (A) = 500 μm; (B, C) = 200 μm; (F, H) = 50 μm; (D) = 40 μm; (E) = 30 μm; (G) = 20 μm.
Table 4.
Number and distribution of ST and SB in the dorsal and ventral surface of different antennae segments in both sexes of A. asiaticus and C. villosulum.
Fig 9.
High-resolution images for types of SB on the antennae of A. asiaticus and C. villosulum.
(A) The morphology of SB I of A. asiaticus. (B) The morphology of SB II of A. asiaticus. (C) The morphology of SB III of A. asiaticus. (D) The morphology of SB I of C. villosulum. (E) The morphology of SB II of C. villosulum. (F) The morphology of SB III of C. villosulum. Scale bars: (F) = 30 μm; (C, D, E) = 10 μm; (A, B) = 5 μm.
Fig 10.
Mean (± SE) numbers per replicate of adult beetles of different genders of A. asiaticus and C. villosulum that were caught during a field experiment conducted in Guangxi Autonomous Region, China, during March to April 2016.
Compound abbreviations: ketol—racemic 3-hydroxyhexan-2-one, pyrrole—1-(1H-pyrrol-2-yl)-1, 2-propanedione. * indicate significant difference between different objects of the same treatment at 0.05 level using the t-test.