Scapteriscus chaetica (Keil, 1999)

S. chaetica

These sensilla were the most abundant on mole cricket antennae (up to 120 per segment) ( Table 2). The surface of these sensilla had transverse ridges with no evidence of wall pores ( Fig. 3 A, B View Fig ). Three types of s. chaetica were observed based on their size and distribution pattern on the antennae. Type I were relatively large s. chaetica (~100 μm long and 5 μm wide) and they created ring–like transverse patterns (relative to the antennal axis) at the base of an antennal segment ( Fig. 1 B, D View Fig and Fig. 3 C View Fig ). They were relatively straight, in contrast to other types of sensilla which were medium ( type II) in size and curved toward the following antennal segment. Medium s. chaetica (~60 μm long and 3 μm base diameter) usually were observed in the rows at the distal part of the segment. The smallest s. chaetica ( type III) were distributed evenly on the antennal segment (40 μm long and 2 μm base diameter). Wall pores were not observed on the s. chaetica and TEMs showed that the larger s. chaetica ( types I and II) were filled with dense material with no evidence of dendritic processes in the lumen ( Fig. 4 A, B View Fig ). However small ( type III) s. chaetica were innervated ( Fig. 4 C, D View Fig ).