Veturius (Publius) impressus Hincks, 1934

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 : 103-104

Veturius (Publius) impressus Hincks, 1934

( Figs. 1 g, 2g, 2h, 3g, 4g, 6, 9c)

Third instar. Body: length 50.0–55.0 mm, width (prothorax) 9.0 mm; covered with tiny, stout setae ( Fig. 9 c); prosternal setae absent. Primary setal pattern: 3 HPA, 0 PD, 3 PSL, 0 MSD, 2 MSL, 0 MTD, 1–2 MTL, 0 TM, 1 TSM, 1 TL, 1 AV9 ( Table 2 ). Head: without uniform pile of short, golden setae; width of head capsule 7.0 mm. Epicranial suture short; frontal sutures extend to base of antennae ( Fig. 1 g). Mandibles with micro-asperities in the ventral base. Maxillary stipes with 22 micro-conical projections ( Figs. 2 g, h). Legs: pars stridens (mesocoxae) length 776.29 µm, width 498.24 µm, distance into striate 13.97 µm, 55 striae; mesocoxae and metacoxae with 2 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 gradually decreasing in size, II is the smallest tooth ( Fig. 3 g). Abdomen: raster with setae; anal ring with 15–16 setae; anal slit T-shaped ( Fig. 4 g).

Pupa. Body: length 40.0 mm, width (prothorax) 17.0 mm. Body shape elongate, oval, stout, exarate, creamwhite ( Fig. 6 ). Head visible in dorsal view. Antennae, labrum, mandibles, maxillae, maxillary palpi, and compound eyes discernible ( Figs. 6 a, c). Thorax: elytral and posterior wing pads closely juxtaposed curved ventrally around body, extending to the middle of abdominal segment V ( Figs. 6 a, b). Abdomen: segment VIII visible under dorsal view and well defined ( Fig. 6 a), but 10 are considered to exist, abdominal segments IX and X related to genitalia formation; segments IV–VIII in ventral view well defined ( Fig. 6 c); segment X with small genital ampulla ( Fig. 6 d); spiracle I elongate, with fine peritreme and covered by wing pads; spiracles II–III oval, prominent, with strongly sclerotized peritreme; spiracle IV–VII with fine peritreme. Spiracle VII smaller than the others. Abdominal apex rounded.

Distribution. Endemic species of the Sierra Nevada de Santa Marta, Colombia ( Boucher 2006). Material examined. COLOMBIA, MAGDALENA, Sierra Nevada de Santa Marta, Sector Bella Vista, 11°05'46''N 74°04'51.7''W, 1560 m, 28.iv.2007. L. Jiménez & A. Mejía (12 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 6. Light micrographs of pupa of Veturius impressus. (a) Dorsal view, (b) lateral view, (c) ventral view, (d) genital ampulla. Scale 2 mm.

FIGURE 9. Light micrographs of the abdominal segment V (laterodorsal view), showing the setae of the body. (a) Uniform pile of fine short setae (Veturius aspina), with detail of the setae. (b) Tiny, stout setae (V. simillimus), with detail of the setae. (c) Tiny, stout setae (V. impressus), with detail of the setae. Scale 0.1 mm.