Veturius

Salazar-Niño, Karen & Serrão, José Eduardo, 2015, Description of the immature stages of nine species of Veturius (Coleoptera: Passalidae), Zootaxa 3925 (1), pp. 94-108 : 96

Veturius (Vetur ius) assimilis (Weber, 1801)

( Figs. 1 b, 2b, 3b, 4b, 7)

Third instar. Body: length 35.0 mm, width (prothorax) 7.0 mm; with tiny, stout setae; prosternal setae present; presence of other setae in the lateroventral part of the abdominal segments I–IX. Primary setal pattern: 3 HPA, 0 PD, 3 PSL, 0 MSD, 2 MSL, 0 MTD, 2 MTL, 1 TM, 0 TSM, 1 TL, 1 AV9 ( Table 2 ). The TSM setae present only in the abdominal segments VIII–IX. Head: without uniform pile of short, golden setae; epicranial suture short; frontal sutures extend to the base of the antennae; width of head capsule 4.0 mm ( Fig. 1 b). Mandibles with microasperities in the ventral base. Maxillary stipes with 18 micro-conical projections ( Fig. 2 b). Legs: pars stridens (mesocoxae) length 793.04 µm, width 495.63 µm, distance into striate 10.34 µm, 51 striae ( Fig. 7 ); mesocoxae and metacoxae with 2 internal setae. Metathoracic legs with some short medial and posterior setae and micro-asperities in the posterior areas; anterior margin with 6 teeth, I and III–VI well developed and almost the same size, II is the smallest tooth ( Fig. 3 b). Abdomen: raster with setae; anal ring with 18 setae; anal slit T-shaped ( Fig. 4 b).

Distribution. States of Minas Gerais, Rio de Janeiro, São Paulo, Paraná, Santa Catarina, Rio Grande do Sul, Brazil and Alto Paraná, Paraguay ( Boucher 2006). The material examined confirms their presence in Misiones, Argentina ( Jiménez-Ferbans et al. 2013).

Material examined. ARGENTINA, MISIONES, Andrecito, Bio-Reserva Karadyá, 25°51'42.6''S 53°57'41.9''W, 388 m, 11.iii.2012. Reyes-Castillo, Jiménez-Ferbans, Salazar-Niño, & J. Moreno (4 specimens).

Figures

FIGURE 1. Light micrographs of the head. (a) Veturius aspina, (b) V. assimilis, (c) V. simillimus, (d) V. sinuatocollis, (e) V. sinuatus, (f) V. crassus, (g) V. impressus, (h) V. oberthuri, (i) V. negroensis. Epicranial suture (ES) and frontal suture (FS) and post-antennal head setae (HPA). Scale 1 mm.

FIGURE 2. Scanning electronic micrographs of maxillae. (a) Veturius aspina, (b) V. assimilis, (c) V. simillimus, (d) V. sinuatocollis, (e) V. sinuatus, (f) V. crassus, (g) V. impressus, (h) high magnification of encircled area of Fig. 2 g of the microconical projections (arrow) on the stipes (i) V. oberthuri, (j) V. negroensis. Scale 200 µm.

FIGURE 3. Scanning electronic micrographs of metathoracic legs. (a) Veturius aspina, (b) V. assimilis, (c) V. simillimus, (d) V. sinuatocollis, (e) V. sinuatus, (f) V. c r a s s u s, (g) V. impressus, (h) V. oberthuri, (i) V. negroensis. I – VI indicate the number of teeth. Scale 100 µm.

FIGURE 4. Light micrograph of the abdominal segment X, showing the anal opening (AP), anal ring setae (AR) and raster (R). (a) Veturius aspina, (b) V. assimilis, (c) V. simillimus, (d) V. sinuatocollis, (e) V. sinuatus, (f) V. c r a s s u s, (g) V. impressus, (h) V. oberthuri, (i) V. negroensis. Scale 1 mm.

FIGURE 7. Scanning electronic micrograph of the mesocoxae of Veturius assimilis showing the pars stridens (ps). (a) View general of the mesocoxa. (b) High magnification of the ps in the lateral region. (c) High magnification of the ps in the central region.