Sitona hispidulus (Fabricius, 1776)

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 : 406-410

Sitona hispidulus (Fabricius, 1776)

( FIgS 2-8D )

Body. LeNgTH 4.0–4.8 MM, WIDTH 1.2–1.5 MM. SeTAe MeDIUM lONg TO VeRY SHORT. PROTHORAX ( FIg. 2c ) WITH 8 prns, ONe SeTA PlAceD clOSe TO SPIRAcle. MeSO- AND MeTATHORAX ( FIg. 2c ) eAcH WITH 1 VeRY SHORT prs AND 4 pds: THe TWO APIcAl SeTAe MeDIUM lONg, THe NeXT TWO VeRY lONg. EAcH PeDAl AReA WITH 6 pda, DIFFeReNT IN leNgTH. AbD. VIII ( FIg. 4D ) WITH 1 SHORT prs AND 3 pds; ts VeRY SMAll.

FIGURES 2–4 (e–h). 2—Mature larva, chaetotaxy of thoracic segments, 3—chaetotaxy of first abdominal segment, 4— chaetotaxy of the 7th—10th abdominal segments. e—S. lineatus , f—S. macularius , g—S. obsoletus , h—S. waterhousei . 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.

Head. LIgHT bROWN, clOSe TO SUbOVAl, WIDTH: 0.70–0.80 MM, leNgTH: 0.55–0.65 MM; eNDOcARINA ReAcHeS 1/5 THe leNgTH OF FRONS ( FIg. 5D ). Fs 1 AND fs 3 VeRY SHORT, fs 4 SlIgHTlY SHORTeR THAN fs 5. Les 1 AND les 2 eQUAl IN leNgTH, SlIgHTlY SHORTeR THAN des 1. Ves 1-2 SHORT, POORlY DeVelOPeD. POSTePIcRANIAl AReA WITH 6 pes. STeMMATA DeVelOPeD. ANTeNNAl bASAl MeMbRANOUS ARTIcle WITH 4 bASIcONIc SeNSIllAe. LAbRUM ( FIg. 6D ) APPROXIMATelY 3.0 TIMeS AS WIDe AS lONg; ANTeRIOR MARgIN SINUOUSlY eMARgINATeD; 2 PAIRS OF ams, DIFFeReNT IN leNgTH (MeDIAN PAIRS HAlF THe leNgHT THAN lATeRAl) AND 3 PAIRS OF als. LAbRAl RODS AlMOST PARAllel. ClYPeUS ( FIg. 6D ) 3.5 TIMeS AS WIDe AS lONg; ANTeRIOR MARgIN SlIgHTlY cONVeX, lATeRAl MARgINS SINUOUSlY eMARgINATeD; MeDIAN FURROW ReAcHeS 1/2 THe leNgTH OF clYPeUS. EPIPHARYNX ( FIg. 7D ) WITH 3 PAIRS OF als, 2 PAIRS OF ams AND 2 PAIRS OF mes. MANDIble WITH 2 ADDITIONAl TeeTH, ONe clOSe TO APeX, NeXT IN MIDDle. MAXIllA ( FIg. 8D ) WITH SHORT mbs; bOTH PAlPOMeReS eQUAl IN leNgTH, bUT bASAl DISTINcTlY WIDeR THAN DISTAl. PRAelAbIUM TRIANgUlAR, WITH TWO PAIRS OF ligs; bASAl PAlPOMeRe WIDeR THAN DISTAl; pslb 3 SHORTeR THAN 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.