Sitona macularius (Marsham, 1802)

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 macularius (Marsham, 1802)

( FIgS 2–8F )

Body. LeNgTH 4.0–5.4 MM, WIDTH 1.3–1.6 MM. SeTAe VeRY lONg TO SHORT. PROTHORAX ( FIg. 2F ) WITH 8 prns, TWO SeTAe PlAceD clOSe TO SPIRAcle. MeSO- AND MeTATHORAX ( FIg. 2F ) eAcH WITH 1 VeRY SHORT prs AND 4 pds OF MeDIUM leNgTH. EAcH PeDAl AReA WITH 5 pda, ONe OF THeM DISTINcTlY lONgeR THAN THe ReMAININg SeTAe. AbD. VIII ( FIg. 4F ) WITH 1 VeRY SHORT prs AND 4 pds; ts VeRY SHORT bUT DeVelOPeD.

Head. YellOW, SlIgHTlY FlATTeNeD lATeRAllY; WIDTH: 0.65 –0.80 MM, leNgTH: 0.45–0.65 MM; eNDOcARINA ReAcHeS MORe THAN 1/2 THe leNgTH OF FRONS. Des 3 DISTINcTlY SHORTeR THAN des 1, des 4 VeRY SHORT ( FIg. 5F ). Fs 1 MeDIUM lONg, fs 3 AlMOST INVISIble, fs 4 AS lONg AS fs 5. Les 1 AND les 2 eQUAl IN leNgTH , AS lONg AS des 1. Ves 1-2 SHORT, POORlY DeVelOPeD. POSTePIcRANIAl AReA WITH 4 pes . STeMMATA INVISIble. ANTeNNAl bASAl MeMbRANOUS ARTIcle WITH 5 bASIcONIc SeNSIllAe. LAbRUM ( FIg. 6F ) APPROXIMATelY 3.0 TIMeS AS WIDe AS lONg; ANTeRIOR MARgIN SINUOUSlY eMARgINATeD; 3 PAIRS OF ams, DIFFeReNT IN leNgTH, MeDIAN PAIRS THRee TIMeS lONgeR THAN THe lATeRAl SeTAe, 2 PAIRS OF mes, VARIOUS IN leNgTH , AND 3 PAIRS OF als. LAbRAl RODS cONVeRgINg POSTeRIORlY. ClYPeUS ( FIg. 6F ) 3.4 TIMeS AS WIDe AS lONg; ANTeRIOR MARgIN AlMOST STRAIgHT, lATeRAl MARgINS AlMOST STRAIgHT; MeDIAN FURROW ReAcHeS 2/3 THe leNgTH OF clYPeUS. EPIPHARYNX ( FIg. 7F ) WITH 3 PAIRS OF als ; 3 PAIRS OF ams AND 2 PAIRS OF mes. MANDIble: SecOND TOOTH blUNT, PlAceD clOSe TO APeX. MAXIllA ( FIg. 8F ) WITHOUT mbs; bASAl PAlPOMeRe DISTINcTlY SHORTeR AND WIDeR THAN THe DISTAl. PRAelAbIUM cORDIFORM, WITH 2 PAIRS OF ligs; bOTH PAlPOMeReS eQUAl IN leNgTH, bUT bASAl A lITTle WIDeR THAN THe DISTAl; pslb 3 AlMOST HAlF AS lONg AS 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.