Andrion regensteinense (Herbst, 1794)

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 : 404-405

Andrion regensteinense (Herbst, 1794)

( FIgS 2–8A )

Body. LeNgTH 4.3–5.5 MM, WIDTH 1.2–1.5 MM. SeTAe MeDIUM lONg TO VeRY SHORT. EAcH SIDe OF PROTHORAX ( FIg. 2A ) WITH 9 prns, ONe SeTA PlAceD belOW SPIRAcle; MeSO- AND MeTATHORAX ( FIg. 2A ) eAcH WITH 1 VeRY SHORT prs AND 4 pds: THe TWO APIcAl pds VeRY SHORT, NeXT TWO MeDIUM lONg; as AND sps VeRY SHORT, eps MeDIUM lONg. EAcH PeDAl AReA WITH 5 pda, DIFFeReNT IN leNgTH. AbD. VIII ( FIg. 4A ) ON eAcH SIDe WITH 1 VeRY SHORT prs AND 4 pds, ts VeRY SHORT.

Head. BROWN, WIDe , WITH PARAllel SIDeS; WIDTH: 0.45–0.65 MM, leNgTH: 0.40–0.60 MM; eNDOcARINA ReAcHeS 1/5 THe leNgTH OF FRONS ( FIg. 5A ); fs 1 MeDIUM lONg, 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 3 pes . STeMMATA DeVelOPeD. ANTeNNAl bASAl MeMbRANOUS ARTIcle WITH 4 bASIcONIc SeNSIllAe. LAbRUM ( FIg. 6A ) APPROXIMATelY 3.4 TIMeS AS WIDe AS lONg; ANTeRIOR MARgIN AlMOST ROUNDeD; 3 PAIRS OF ams: 2 MeDIAN PAIRS elONgATe, eQUAl IN leNgTH, lATeRAl PAIR VeRY SHORT ; 3 PAIRS OF als, 2 PAIRS OF mes ( FIRST PAIR AlMOST AS lONg AS als, SecOND DISTINcTlY SMAlleR). LAbRAl RODS AlMOST PARAllel . ClYPeUS ( FIg. 6A ) 3.4 TIMeS AS WIDe AS lONg; ANTeRIOR MARgIN SlIgHTlY cONVeX, lATeRAl MARgIN STRAIgHT; MeDIAN FURROW ReAcHeS 1/3 THe leNgTH OF clYPeUS. EPIPHARYNX ( FIg. 7A ) WITH 3 PAIRS OF FINgeR-lIke als; 3 PAIRS OF ams AND 2 PAIRS OF FINgeR-lIke mes). MANDIble WITH 2 ADDITIONAl TeeTH, DIFFeReNT IN leNgTH. MAXIllA ( FIg. 8A ) WITHOUT mbs; bOTH PAlPOMeReS eQUAl IN leNgTH, bUT bASAl PAlPOMeRe DISTINcTlY WIDeR THAN DISTAl . PRAelAbIUM cORDIFORM, WITH A SINgle PAIR OF ligs; bASAl PAlPOMeRe SlIgHTlY lONgeR AND WIDeR THAN DISTAl, pslb 3 A lITTle 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.