Pissodes punctatus Langor and Zhang 1999

Williams, Daryl J. & Langor, David W., 2011, Description of Mature Larvae ofPissodes yunnanensisLangor and Zhang andPissodes punctatusLangor and Zhang (Coleoptera: Curculionidae) from China, The Coleopterists Bulletin 65 (2), pp. 157-166 : 164-165

Pissodes punctatus Langor and Zhang 1999 ( Figs. 11 , 13 , 14–22 )

Pissodes punctatus Langor and Zhang , in Langor et al. 1999: 595

Diagnosis. Larvae of P. punctatus may be separated from those of other known Pissodes species by the following combination of characters: head unicolorous to possessing pale area on central 0.25 or more of dorsal surface that is lighter in color than remainder ( Fig. 14 ); antenna with a conspicuous, elongate sensorium, as long as wide at base or longer, with truncate apex ( Figs. 14, 16 ); occipital foramen without ventral apodemes, curvature of foramen continuous ( Fig. 17 ); pigmentation of pronotum pale, most specimens with pigmentation present on mediodorsal ¼ to ½ of sclerite, rarely present only as a faintly pigmented stripe near anteromedial margin ( Fig. 11 ); prodorsum of abdominal segments with posterior margin medially emarginated, prodorsum lens-shaped, bi-convex ( Fig. 13 ).

Description. Similar to P. yunnanensis except as follows: Color light brown, most specimens with central 0.25–0.33 of dorsal surface of head capsule with a pale area on the posterior portion of the frons and either side of epicranial suture, rarely unicolorous or with faint stripes around des1 ( Fig. 14 ). Side of head capsule with anterior end of pale stripe directed around les1 and toward les2 ( Fig. 16 ). Head capsule oval, width/length in anterior view 1.00–1.04 ( Figs. 14, 17 ); posterior margin in lateral view with middle quarter slightly convex to flat ( Fig. 16 ). Endocarina covering 0.7–0.8 of distance between epicranial suture and epistoma ( Fig. 14 ). Posterolateral margin of occipital foramen with elongate triangular, rounded postoccipital condyle; occipital foramen somewhat quadrate, with dorsal half less concave than ventral half to nearly straight, widest point near ventral margin; ventral apodemes lacking, foramen curvature in ventral half continuous ( Fig. 17 ). Setae des1 and des2 at head capsule mid-length, des3–des5 on lateral third of margin of frontal suture; des3 and des 5 in near proximity and relative distant from des4 ( Fig. 14 ). Seta les1 about 0.6 as long as les2; setae separated by about the length of les2; les2 close to anterior margin of head ( Figs. 14, 17 ). Labrum width/length about 1.5 ( Fig. 18 ); apex with als1–als3 present; ams longer than als1–3, some specimens with a supernumerary minute ams present ( Fig. 19 ). Postmentum membranous, with an irregularly elongate-oval pigmented area on each side of premental sclerite; pigmented areas slightly depressed, and slightly sculptured in some specimens ( Fig. 20 ). Pigmentation of pronotum pale, most specimens with pigmentation present on mediodorsal ¼ to ½ of sclerite, rarely present only as a faintly pigmented stripe near anteromedial margin ( Fig. 11 ). Pleurum fused to lateral margin of pedal area, represented by setose area; area large, broadly to irregularly oval, smooth, bearing long setae, devoid of microtrichia. Pedal area ovoid, unpigmented to slightly pigmented, slightly convex and with a distinct margin in most specimens, lacking microtrichia, larger than pleural sclerite. Meso- and metathorax with pedal area slightly convex and with distinct margin in most specimens. Pedal area with 6 setae, posterior about 0.66 as long as longest pleural seta, remainder shorter; pedal area plus pleurum broadly oval, narrower near midline than laterally, sclerite irregular oval, unpigmented, detectable only by absence of microtrichia. Abdominal segments I-VII with prodorsum lens-shaped and apically acute, with posterior margin slightly concave, groove separating it from anterior segment slightly obscured laterally ( Fig. 13 ); prodorsum as long as both sections of postdorsum on midline, with posterior margin slightly concave, groove separating it from anterior segment slightly obscured laterally; prodorsum slightly shorter than both sections of postdorsum on midline ( Fig. 13 ); spiracular area oval, with anteroventral depression not to lightly pigmented, merged with deep groove between postdorsum and epipleurum. Abdominal segment IX with dorsum separated from pleurum by a distinct groove ( Figs. 21, 22 ). Abdonimal segment X with dorsal lobe lightly larger than lateral lobes.

Material Examined. China. Yunnan Province. Banqiao , 25°35′N 102°56′E, ex. Pinus armandi , 15.viii.2003, Ying-X Situ, 8 fourth instar, 1 third instar, 4 pupae ; Kunming , 25°05′N 102°72′N, ex. Pinus armandi , iv-v.1992, Ying-X Situ, 5 fourth instar, 5 third instar, 3 second instar, 3 pupae ; Xundian county , ex. Pinus armandi , 1v.2003, DW Langor, 2 fourth instar, 2 pupae .

Figures

Figs. 10–11. Left half of the pronotum of the fourth instar of Pissodes spp. showing sclerite in dorsal view. 10) P. yunnanensis; 11) P. punctatus.

Figs. 12–13. Abdominal segments I and II of the fourth instar of Pissodes spp. in dorsal view. 12) P. yunnanensis; 13) P. punctatus.

Figs. 14–17. Head capsule of the fourth instar of Pissodes punctatus. 14) Dorsal aspect (habitus anterior view);

Figs. 18–20. Mouthparts of the fourth instar of Pissodes punctatus. 18) Clypeus and labrum; 19) Epipharynx; 20) Labiomaxillary complex.

Figs. 21–22. Apex of the abdomen of the fourth instar of Pissodes punctatus. 21) Lateral view; 22) Dorsoposterior view.