Liophloeus tessulatus (Müller, 1776)

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: 453

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Liophloeus tessulatus (Müller, 1776)


Liophloeus tessulatus (Müller, 1776) 

( Figs 3View FIGURES 1 – 10, 13View FIGURES 11 – 20, 29–31View FIGURES 29 – 31)

Material. 1 ♀, collected from a flowerpot with Aegopodium podagraria  L. in the CURCI in Hannover, 0 3.11. 2012.

Over 20 adult weevils were collected on 20.04. 2012 in Hannover, Steintormasch, garden colony, in the late evening from Hedera helix  L. 16 of these weevils were released on 27.04. in a rearing cage in the climate chamber of the Julius-Kühn-Institute in Braunschweig (= JKI) with 6 flowerpots (3 with Aegopodium podagraria  and 3 with Hedera helix  L.). On 25.07. all Aegopodium  plants were withered. 8 larvae were still alive. These were taken to the CURCI, set in 2 new Aegopodium  pots and 1 developed into the pupal stage. From a Hedera  pot, taken to Hannover, 1 adult weevil hatched on 0 6.01. 2013. The dense root system of ivy made the larva and pupa control rather difficult.

General morphology. Body length: 9.10 mm (♀), width at the level of mesocoxae: 5.10 mm (♀), head width: 1.60 mm (♀). Body moderately slender, slightly curved, whitish or grayish. Cuticle smooth. Rostrum short, almost 0.7 as long as wide, surpassing procoxae in repose. Antennae rather elongate and slender. Pronotum almost 1.55 as wide as long. Ab. I –VI almost of equal length; ab. VII semicircular; next abdominal segments tapering towards the end of the body. Pseudocerci very short, conical. Five pairs of functional spiracles placed laterally on Ab. I –V.

Chaetotaxy. Setae short or very short, hair-like, without curved apical part, yellow or light brown except those on abdominal tergites, based on very small protuberances. Rostrum with 4 pairs of rs 1-4 and 3 pairs of pas 1-3; head capsule bearing: 1 pair of vs, 2 pairs of sos 1-2 and 1 pair of os 1. Setae rs 1-4, vs, sos 2, os 1 and pas 1-3 long, well visible; setae of mandibular thecae (mts 1-2), epistomal setae (es 1-2) and sos 1 very short, poorly visible. Pronotum with a pair of sls and paired as 1-2, ls 1-2, ds 1-2 and pls 1-2. Sls 1-2 visibly shorter than other pronotal setae. Meso- and metathorax each with 4 pairs of short setae (d 1-4). Tergal parts of each Ab. I –IV with 5 pairs of d 1-5, different in length, located posteriorly and 2 pairs of l 1-2 located near the tergum-sternum border. Ab. V –VII each with 5 pairs of d 1-5, different in length, located posteriorly; a pair of d 0 setae placed antero-medially and 2 l 1-2 located near the tergum-sternum border. Ab. VIII with 2 pairs of long d 1-2 setae, located posteriorly, a pair of d 0 placed antero-medially and 2 pairs of l 1-2. Ab. IX without setae. Abdominal setae and their protuberances (especially odd ones: d 1, d 3, d 5) increasing gradually from Ab. I to VIII. Each apex of femora with 2 hair-like setae (fes 1-2), almost equal in length.