Barypeithes pellucidus (Boheman, 1834)

Gosik, Rafał & Sprick, Peter, 2013, Morphology and identification of the pupae of several species of soil-dwelling broad-nosed weevils from Central Europe (Coleoptera, Curculionidae, Entiminae), Zootaxa 3731 (4), pp. 445-472 : 447-451

Barypeithes pellucidus (Boheman, 1834)

( Figs 1 , 11 , 21–24 , 55–57 , 68–71 , 76 )

Material. 5 ♂♂, 6 ♀♀, collected on 0 6.04. 2011 in a garden near Hildesheim in the soil rooted by Bergenia cordifolia (Haw.) Sternb. ‘Admiral’ ( Fig. 76 ); 2 ♂♂, 1 ♀ collected on 26.03. 2012 in a rocky garden in Aerzen- Königsförde near Hameln under Fragaria vesca L.; 8 ♂♂, 9 ♀♀ pupae were collected on 0 1.05.2013 at the border of the Leine river in Hannover-Stöcken, 15 of them in soil between the roots of Alopecurus pratensis L. and 2 of an unidentified grass).

General morphology. Body length up to 4.75 mm (♀), 4.30 mm (♂); width at the level of mesocoxae 2.50 mm (♀), 2.10 (♂); head width up to 0.75 mm (♀), 0.70 mm (♂). Body stout or moderately stout, slightly curved, whitish or yellowish. Cuticle covered by minute cuticular processes. Rostrum rather short, almost 1.2 as long as wide, surpassing procoxae in repose. Antennae rather short and stout, clava covered by cuticular thickening. Pronotum almost 1.36 as wide as long. Abdominal segments (= Ab.) I–VI almost of equal length; Ab. VIII semicircular, next Ab. tapering towards the end of the body. Pseudocerci conical, elongate with sclerotized apical parts ( Figs 55–57 ), slightly curved inward. Sexual dimorphism visible in the structure of Ab. IX: gonotheca of ♀ divided ( Fig. 21 ), of male undivided ( Fig. 22 ). Five pairs of functional spiracles placed laterally on Ab. I–V.

Chaetotaxy. Setae different in form and length, hair- or thorn-like ( Figs 68–71 ), yellow or brown, based on protuberances different in size or without protuberances. Rostrum with 2 pairs of es1-2 and 4 pairs of rs1-4; head capsule bearing 1 pair of vs, 2 pairs of sos1-2, 1 pair of os and 2 pairs of pas1-2. Vs short, thorn-like, based on conical protuberances, remaining setae of head and rostrum long, hair-like, located without protuberances. Pronotum with paired setae: as1-2, sls1-2, ds1-2, pls1-2 and a pair of ls. Pronotal setae thorn-like, based on more or less elongate protuberances, different in length (macrosetae: as2, ds1, sls2 and pls1; microsetae: as1, ds2, ls1, sls1 and pls2). Macrosetae 2–3 times shorter than their protuberances. Meso- and metathorax each with 5 pairs of thorn-like dorsal setae (d), (2 macro- and 3 microsetae), based on conical protuberances. Tergal parts of each Ab. I–VIII with 3 pairs of thorn-like d, arranged postero-medially in regular lines and with a pair of lateral setae (l) located near the tergum-sternum border. Ab. IX with 3 pairs of short ventral setae (v). Abdominal setae and their protuberances distinctly increasing gradually from Ab. I to VIII. Each apex of femora with 2 hair-like setae (fes1-2), almost equal in length.

Figures

FIGURES 1 – 10. Weevils (adults, dorsal view): 1 — Barypeithes pellucidus; 2 — Brachyderes incanus; 3 — Liophloeus tessulatus; 4 — Otiorhynchus dieckmanni; 5 — O. tenebricosus form lugdunensis; 6 — Peritelus sphaeroides; 7 — Phyllobius pyri s. l.; 8 — P. intrusus; 9 — Strophosoma c. f. sus; 10 — Tanymecus palliatus (photos: P. Sprick).

FIGURES 11 – 20. Pupae (ventral view): 11 — Barypeithes pellucidus; 12 — Brachyderes incanus; 13 — Liophloeus tessulatus; 14 — Otiorhynchus dieckmanni; 15 — O. tenebricosus form lugdunensis; 16 — Peritelus sphaeroides; 17 — Phyllobius pyri; 18 — P. intrusus; 19 — Strophosoma c. f. sus; 20 — Tanymecus palliatus (photos: R. Gosik).

FIGURES 21 – 24. Barypeithes pellucidus (pupa, habitus and chaetotaxy): 21 — ventral view of female; 22 — ventral view of male; 23 — lateral view; 24 — dorsal view (abbreviations: es — epistomal setae, rs — rostral s., pas — postantennal s., os — orbital s., sos — superorbital s., vs — vertical s., as — apical s., ls — lateral s., sls – superlateral s., ds — discal s., pls — posterolateral s., fes — femoral s., d — dorsal s., l — lateral s., pc—pseudocerci).

FIGURES 55 – 63. Setae and microstructure of selected body parts I. Barypeithes pellucidus: 55 – 57 — pseudocerci; Brachyderes incanus: 58 — pseudocerci; 59 — vertical setae; Otiorhynchus tenebricosus form lugdunensis: 60 — vertical s. (with destroyed apical part); 61 — dorsal s., 62 — apical s., 63 — dorsal s. of Ab. VIII (photos: R. Gosik).

FIGURES 64 – 71. Setae and microstructure of selected body parts II. Phyllobius pyri: 64 — postantennal and orbital setae, 65 — rostral s., 66 — vertical s. and apical s., 67 — superlateral s.; Barypeithes pellucidus: 68 — apical s., 69 — superlateral s.; 70 — vertical s.; Phyllobius intrusus: 71 — pseudocerci (photos: R. Gosik).

FIGURES 72 – 77. Sampling sites of pupae or mature larvae (reared to pupae) of field-collected species. 72 and 73 — sampling site and habitat of Brachyderes incanus and Strophosoma c. f. sus larvae or pupae near Berkhof (09.07., 02.09.2012): a sand pit with naturally grown Calluna and Pinus vegetation; 74 — sampling site of mature larvae of Phyllobius intrusus under Chamaecyparis obtusa ‘ Crippsii’ in a tree nursery in Bad Zwischenahn, 29.03.2011; 75 — sampling site of a pupa of Phyllobius pyri s. str. at the border of Helstorf peat bog, 21.04.2012; 76 — sampling site of Barypeithes pellucidus pupae: a bed of Bergenia cordifolia ‘ Admiral’ in a garden near Hildesheim, 06.04.2011; 77 — sampling site of a Tanymecus palliatus pupa in a Medicago sativa field near Cottbus on fly ash soil, 0 9.08. 2011 (photos: P. Sprick).