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 : 414

Sitona lineatus (Linnaeus, 1758)

( FIgS 2–8e )

Body. LeNgTH 4.5–5.3 MM, WIDTH 1.3–1.5 MM. SeTAe lONg TO VeRY SHORT. PROTHORAX ( FIg. 2e ) WITH 8 prns, ONe SeTA PlAceD clOSe TO SPIRAcle. MeSO- AND MeTATHORAX ( FIg. 2e ) eAcH WITH 1 SHORT prs AND 4 pds, AlMOST eQUAl IN leNgTH. EAcH PeDAl AReA WITH 6 pda, DIFFeReNT IN leNgTH. AbD. VIII ( FIg. 4e ) WITH 1 VeRY SHORT prs AND 3 pds; ts VeRY SHORT.

Head. YellOW, SUbcIRcUlAR; WIDTH: 0.55 –0.65 MM, leNgTH: 0.65–0.75 MM; eNDOcARINA ReAcHeS 1/2 THe leNgTH OF FRONS. Des 4 VeRY SHORT ( FIg. 5e ). Fs 1 VeRY SHORT, fs 3 AlMOST INVISIble, fs 4 SlIgHTlY SHORTeR THAN fs 5 . Les 1 AND les 2 eQUAl IN leNgTH, AS lONg AS des 1. Ves 1-2 SHORT, POORlY DeVelOPeD. POSTePIcRANIAl AReA WITH 3 pes . STeMMATA DeVelOPeD. ANTeNNAl bASAl MeMbRANOUS ARTIcle WITH 4 bASIcONIc SeNSIllAe. LAbRUM ( FIg. 6e ) APPROXIMATelY 2.5 TIMeS AS WIDe AS lONg; ANTeRIOR MARgIN SINUOUSlY eMARgINATeD; 3 PAIRS OF ams, VARIOUS IN leNgTH: MeDIAN PAIRS TWIce lONgeR THAN THe lATeRAl SeTAe; 2 PAIRS OF als . LAbRAl RODS AlMOST PARAllel. ClYPeUS ( FIg. 6e ) 5.0 TIMeS AS WIDe AS lONg; ANTeRIOR MARgIN cONVeX, lATeRAl MARgINS SINUOUSlY eMARgINATeD; MeDIAN FURROW ReAcHeS 3/4 THe leNgTH OF clYPeUS. EPIPHARYNX ( FIg. 7e ) WITH 2 PAIRS OF als ; 3 PAIRS OF ams AND 2 PAIRS OF mes. MANDIble WITH 1 blUNT ADDITIONAl TOOTH (clOSe TO APeX). MAXIllA ( FIg. 8e ) WITHOUT mbs; bASAl PAlPOMeRe SlIgHTlY SHORTeR AND DISTINcTlY WIDeR THAN THe DISTAl. PRAelAbIUM cORDIFORM, WITH 2 PAIRS OF ligs; bOTH PAlPOMeReS eQUAl IN leNgTH, bUT bASAl WIDeR THAN DISTAl ONe; pslb 3 AlMOST A THIRD THe leNgTH OF THe ReMAININg SeTAe.

Figures

FIGURES 5 (a – h). 5 — Mature larva, head. a—Andrion regensteinense, b—Charagmus gressorius, c— Sitona cylindricollis, d—S. hispidulus, e—S. lineatus, f—S. macularius, g—S. obsoletus, h—S. waterhousei. Setae: des — dorsoepicranial, fs — frontal, les — lateroepicranial, pes — postepicranial, ves — ventral.

FIGURES 6 (a – h). 6 — Larval mouthparts, labrum and clypeus. a—Andrion regensteinense, b—Charagmus gressorius, c— Sitona cylindricollis, d—S. hispidulus, e—S. lineatus, f—S. macularius, g—S. obsoletus, h—S. waterhousei. Setae: cls— clypeal, lrs— labral, clss — clypeal sensorium.

FIGURES 7 (a – h). 7 — Larval mouthparts, epipharynx. a—Andrion regensteinense, b—Charagmus gressorius, c— Sitona cylindricollis, d—S. hispidulus, e—S. lineatus, f—S. macularius, g—S. obsoletus, h—S. waterhousei. Setae: als— anterolateral, ams— anteromedial, mes— median.

FIGURES 8 (a – h). 8 — Larval mouthparts, maxillolabial complex, ventral aspect. a—Andrion regensteinense, b—Charagmus gressorius, c— Sitona cylindricollis, d—S. hispidulus, e—S. lineatus, f—S. macularius, g—S. obsoletus, h—S. waterhousei. Setae: dms— dorsomalar, ligs— ligular, mxps— maxillary palp, mbs— malar basiventral, pfs— palpiferal, plbs— prelabial, pslbspostlabial, stps— stipal, vms— ventromalar.

FIGURES 2 – 4 (a – d). 2 — Mature larva, chaetotaxy of thoracic segments, 3 — chaetotaxy of first abdominal segment, 4 — chaetotaxy of the 7 th — 10 th abdominal segments. a—Andrion regensteinense, b—Charagmus gressorius, c— Sitona cylindricollis, d—S. hispidulus. Setae: as — alar, ds — dorsal, eps — epipleural, eus — eusternal, lsts — laterosternal, pda — pedal, pds — postdorsal, prns — pronotal, prs — prodorsal, ps — pleural, sps — spiracular, sts — sternal, ts— terminal.