Cyclocephala forsteri Endrodi, 1963

Cyclocephala forsteri Endrodi, 1963 View in CoL

The comparison of female and male specimens revealed no statistically significant differences in terms of the length and width of the proximal, medial, and distal flagellomeres of the lamellae. Specifically, the following results were obtained: length of proximal flagellomere of the lamella ( t =1.00; df=3; P <0.19) and width ( t =1.06; df=2; P <0.20); length of medial flagellomere of the lamella ( t =1.84; df=2; P <0.10) and width ( t =0.22; df=2; P<0.42); length of distal flagellomere of the lamella (t=2.38; df=2; P<0.12) and width ( t =0.39; df=2; P <0.38) ( Table 1, Figure 5 View Figure 5 ).

Regarding the dimensions of placoid sensillae, the average diameters were as follows for females and males: type I placoid sensilla: 7.70 ± 0.88 µm in females and 8.05 ± 1.36 µm in males; type II placoid sensilla: 5.19 ± 0.82 µm in females and 5.21 ± 0.76 µm in males ; type III placoid sensilla: 9.62 ± 1.59 µm in females and 10.86 ± 1.42 µm in males .

In terms of the distribution of sensillae within the antennae, the following statistics were observed: female antennae contained a total of 5,457 sensillae, with the majority being type I placoid (97.62%), coeloconic (2.25%), and basiconic (0.13%); male antennae contained a total of 5,351 sensillae, with the majority being type I placoid (97.89%), coeloconic (1.87%), and basiconic (0.24%) ( Table 2).

The inner surfaces of the lamellae displayed both homogeneous and heterogeneous areas. These areas were characterized by the presence of distinct types of sensillae, including type III placoid sensilla, types I and II placoid sensilla, and types I and II coeloconic sensilla ( Figures 5 View Figure 5 and 8 View Figure 8 ) .