Sitona lineatus (Linnaeus, 1758)

Sprick, Peter, 2017, Description of the larvae and pupae of eight species of the tribe Sitonini Gistel, 1848 (Coleoptera, Curculionidae) from Central Europe, Zootaxa 4324 (3), pp. 401-435 : 417

Sitona lineatus (Linnaeus, 1758)

( FIgS 27–29e )

Body. LeNgTH: 4.8–5.2 MM, MAXIMUM WIDTH (AT THe leVel OF PROcOXAe): 2.6–2.7 MM, HeAD WIDTH (AT THe leVel OF eYeS): 1.0–1.2 MM, PROTHORAX WIDTH (AT WIDeST PlAce): 1.3–1.6 MM (♀, ♂). EYeS HeMISPHeRIcAl. BODY MODeRATelY elONgATe, WHITe. PRONOTUM TRAPeZIUM-SHAPeD, APPROXIMATelY 1.8 TIMeS AS WIDe AS lONg. MeTANOTUM SlIgHTlY lONgeR THAN MeSONOTUM. AbD. I–IV OF AlMOST eQUAl leNgTH, AbD. V –VIII DIMINISHINg gRADUAllY, AbD. IX DISTINcTlY SMAlleR THAN THe PReceDINg SegMeNTS. UROgOMPHI RelATIVelY SHORT, WITH Well ScleROTIZeD APIcAl PART.

Chaetotaxy. SeTAe OF UNeQUAl leNgTH AND SHAPe, YellOW OR bROWN, ON HeAD , ROSTRUM AND THORAX HAIR-FORM, bASeD ON PROTUbeRANceS, ON AbDOMINAl SegMeNTS HAIR-FORM OR THORN-lIke, THe lATTeR bASeD ON DISTINcT PROTUbeRANceS. ROSTRUM WITH TWO PAIRS OF rs 1-2; HeAD cAPSUle beARINg 1 vs, 2 sos 1-2, 2 os 1-2 AND 2 pas 1-2 ( FIgS 27e, 29e ). PRONOTUM WITH 2 as 1-2, 2 ds 1-2, ls, 2 sls 1-2 AND 2 pls 1-2 ( FIgS 28e, 29e ). All SeTAe OF PROTHORAX PlAceD ON SMAll PROTUbeRANceS, RelATIVelY SHORT, as 1, ls AND pls 2 SOMe SMAlleR THAN THe ReMAININg SeTAe. MeSO- AND MeTATHORAX eAcH WITH 3 PAIRS OF MODeRATelY elONgATe d 1-3, FORMINg A gROUP IN THe ceNTeR ( FIg. 28e ). TeRgAl PARTS OF AbD. I–VII eAcH WITH 7 PAIRS OF PROTUbeRANceS WITH SHORT, THORN-lIke SeTAe; SeTAe 1–5 FORM A RegUlAR, TRANSVeRSe ROW AlONg THe POSTeRIOR MARgIN, SeTAe 6 AND 7 ARe PlAceD MORe lATeRAllY. SeTAe NO. 1, 3, 5 AND 6 DISTINcTlY bIggeR THAN THe ReMAININg, SO AT FIRST VIeW cHAeTOTAXY OF eAcH SegMeNT SeeMS TO cONSISTS OF 4 PAIRS OF SeTAe ONlY. AbD . VIII WITH A PAIR OF DISTINcT THORN-lIke SeTAe AND TWO PAIRS OF WeAklY DeVelOPeD, SHORT, HAIR-lIke SeTAe ( FIgS 28e, 29e ). AbD. IX WITH 2 SHORT SeTAe, PlAceD clOSe TO UROgOMPHI, NeXT 2 lOcATeD DORSAllY ( FIgS 27e, 29e ). EAcH UROgOMPHUS beARS A PAIR OF SHORT SeTAe.

Figures

FIGURES 27 – 29 (a). Andrion regensteinense, pupa, habitus and chaetotaxy. 27 a—total (ventral view), 28 a—total (dorsal view), 29 a—total (lateral view) (ur—urogomphi, setae: as— apical, d— dorsal, ds— discal, fes— femoral, ls, l — lateral, mts — mandibular theca, os— orbital, pas— postantennal, pls— posterolateral, rs — rostral, sos— superorbital, sls— superlateral, vventral, vs— vertical).