Charagmus gressorius (Fabricius, 1792)

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 : 416

Charagmus gressorius (Fabricius, 1792)

( FIgS 27–29b )

Body. LeNgTH: 7.5–9.4 MM, MAXIMUM WIDTH (AT THe leVel OF PROcOXAe): 4.3–5.0 MM, HeAD WIDTH (AT THe leVel OF eYeS): 1.3–1.5 MM, PROTHORAX WIDTH (AT WIDeST PlAce): 1.8–2.0 MM (♀, ♂). EYeS SlIgHTlY cONVeX. BODY MODeRATelY elONgATe, RATHeR SleNDeR, WHITe. PRONOTUM TRAPeZIUM-SHAPeD, APPROXIMATelY 1.3 TIMeS AS WIDe AS lONg. MeTANOTUM A lITTle lONgeR THAN MeSONOTUM. AbD. I–VI OF AlMOST eQUAl leNgTH, AbD. VII SeMIcIRcUlAR, AbD . VIII NARROW, AbD. IX ReDUceD, DISTINcTlY SMAlleR THAN OTHeR SegMeNTS. UROgOMPHI SHORT, TRIANgUlAR, WeAklY ScleROTIZeD.

Chaetotaxy. SeTAe ON HeAD OF UNeQUAl leNgTH AND SHAPe, bROWN OR DARk bROWN, ROSTRUM AND THORAX HAIR-lIke, bASeD ON PROTUbeRANceS, ON AbDOMINAl SegMeNTS HAIR- OR THORN-lIke, PlAceD ON DISTINcT PROTUbeRANceS. ROSTRUM WITH FOUR PAIRS OF rs 1-4; HeAD cAPSUle beARINg 1 vs, 3 sos 1-3, 2 os 1-2 AND 2 pas 1-2, eAcH MANDIbUlAR THecA WITH A SMAll SeTA (mts) ( FIgS 27b, 29b ). PRONOTUM WITH 2 as 1-2, 2 ds 1-2, ls, 2 sls 1-2 AND 2 pls 1-2 ( FIgS 28b, 29b ). All SeTAe OF PROTHORAX PlAceD ON SMAll PROTUbeRANceS, SHORT, eQUAl IN leNgTH (eXcePT ls, THAT IS A lITTle SMAlleR THAN THe ReMAININg SeTAe). CHAeTOTAXY OF MeSOTHORAX cONSISTINg OF 4 PAIRS OF SHORT d 1-4, PlAceD MeDIAllY AND ANTeROMeDIAllY ( FIg. 28b ). MeTATHORAX WITH 5 PAIRS OF SHORT SeTAe, DISTRIbUTeD RATHeR IRRegUlARlY. TeRgAl PARTS OF AbD. I–VII eAcH WITH 7 PAIRS OF SeTAe (5 PAIRS AlONg THe POSTeRIOR MARgIN, TWO lATeRAllY). SeTAe NO. 1, 3, 5 AND 6 A lITTle bIggeR THAN THe ReMAININg. AbD. VIII WITH 5 PAIRS OF SeTAe, DIFFeReNT IN leNgTH, AlONg THe POSTeRIOR MARgIN, AND ONe PAIR PlAceD ceNTRAllY ( FIgS 28b, 29b ). EAcH AbD. I–VIII WITH 2 PAIRS OF l 1-2, PlAceD clOSe TO THe bORDeR OF TeRgUM ( FIg. 29b ). STeRNAl PARTS OF eAcH AbD. IV–VIII WITH 3 PAIRS OF VeRY SHORT v 1-3, lOcATeD POSTeRIORlY ( FIgS 27b, 29b ). AbDOMINAl DORSAl SeTAe gRADUAllY INcReASINg IN SIZe FROM AbD. I TO VIII. AbD. IX VeNTRAllY WITH 2 PAIRS OF SHORT SeTAe, PlAceD MeDIAllY; NeXT 2 SeTAe lOcATeD DORSAllY ( FIgS 27b, 29b ). EAcH UROgOMPHUS beARS A PAIR OF MODeRATelY elONgATe 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).