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 : 101-102

Veturius (Vetur ius) sinuatus (Eschscholtz, 1829)

( Figs. 1 e, 2e, 3e, 4e)

Third instar. Body: length 54.0 mm, width (prothorax) 9.0 mm; with tiny, stout setae; prosternal setae present; presence of other setae in the lateroventral part of the abdominal segments I–IX and thoracic segments. Primary setal pattern: 3 HPA, 0 PD, 3 PSL, 0 MSD, 2 MSL, 0 MTD, 2 MTL, 0 TM, 1 TSM, 1 TL, 1 AV9 ( Table 2 ). The TM 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 7.0 mm ( Fig. 1 e). Mandibles with micro-asperities in the ventral base. Maxillary stipes with 15 micro-conical projections ( Fig. 2 e). Legs: pars stridens (mesocoxae) length 1143.14 µm, width 849.42 µm, distance into striate 14.76 µm, 62 striae; mesocoxae and metacoxae with 3 internal setae. Metathoracic legs with some short lateral setae (side of I tooth) 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 e). Abdomen: raster with setae; anal ring with 20 setae; anal slit T-shaped ( Fig. 4 e).

Natural history. Larvae were collected in third instar and reared in laboratory conditions (25+2 °C; 54+2% relative humidity; photoperiod 12 light: 8 dark hours) using pieces of decaying logs as food. The third instars to pre-pupal phase took an average of 46 days, pre-pupal phase took an average of four days, pupal phase took an average of 20 days. The complete sclerotization of adults took an average of 40 days.

Distribution. Endemic species from Brazilian Atlantic. States of Bahia, Espírito Santo, Goias, Mato Grosso do Sul, Mato Grosso, Minas Gerais, Paraná, Santa Catarina, Rio de Janeiro (included Ilha Grande), Rio Grande do Sul, São Paulo (included Ilha de São Sebastião), Brasil; Eastern Region, Paraguay and Misiones Province, Argentina ( Boucher 2006).

Material examined. BRAZIL, MINAS GERAIS, Viçosa, Mata do Paraíso, 20°48'07''S 42°51'31''W, 11.x.2013. H. Vacacela, H. Cirqueira, & Salazar-Niño (6 specimens). BRAZIL, MINAS GERAIS, Viçosa, Mata do Paraíso, 20°48'07''S 42°51'31''W, 27.viii.2014. Salazar-Niño (12 specimens). BRAZIL, MINAS GERAIS, Viçosa, Federal University of Viçosa, Recanto das Cigarras, 17.x.2012. L. Monteiro (10 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.