Hygrotus confluens (Fabricius, 1787)

Lamelas-López, Lucas, Raposeiro, Pedro Miguel, Borges, Paulo A. V. & Florencio, Margarita, 2017, Annotated checklist of aquatic beetles (Coleoptera) and true bugs (Heteroptera) in the Azores Islands: new records and corrections of colonization status, Zootaxa 4353 (1), pp. 117-132 : 123

Hygrotus confluens (Fabricius, 1787)

Material. OnE AdUlT SpEcImEn. COllEcTEd On 15/V/2014. ArTIfIcIAl TAnk-WATEr - TErcEIrA ISlAnd. UTM: 26 S 471955 4289511; ThrEE AdUlTS And OnE lArVA . 16/V/2014. ArTIfIcIAl TAnk-WATEr - TErcEIrA ISlAnd. UTM: 26 S 476038 4287687; OnE lArVA . 16/V/2014. ArTIfIcIAl TAnk-WATEr - TErcEIrA ISlAnd. UTM: 26 S 476465 4287767; OnE AdUlT And OnE lArVA . 23/V/2014. ArTIfIcIAl TAnk-WATEr - TErcEIrA ISlAnd. UTM: 26 S 481296 4285624; TWO SpEcImEnS. COllEcTEd bY IgnAcIO RIbErA . 03/Ix/2012. " CASAS dA FAlcA" - TErcEIrA ISlAnd. UTM: 26 S 475521 4286501; 11 SpEcImEnS. COllEcTEd bY IgnAcIO RIbErA . 03/Ix/2012. "LAgOA dO GInjAl" - TErcEIrA ISlAnd. 26 S 486263 4282967.

Habitat. Hygrotus confluens IS USUAllY fOUnd In pErmAnEnT pOndS WITh mInErAlIzEd WATErS And In TEmpOrArY ShAllOW pOndS, WITh SpArSE AQUATIc VEgETATIOn. ThE SpEcIES IS AlSO frEQUEnTlY fOUnd In SmAll ArTIfIcIAl pOndS (PIcAzO et al. 2010) And In ThE cATTlE TAnkS (RIbErA & AgUIlErA 1995; RIbErA et al. 1996A).

Azorean habitat. ThE SpEcIES hAS bEEn fOUnd In hAbITATS ASSOcIATEd WITh hUmAn AcTIVITIES, lIkE ArTIfIcIAl TAnk- WATEr lOcATEd In mEdIUm-hIgh AlTITUdE (498- 793 m.A.S.l.) WITh bASIc WATErS (pH VAlUES rAngIng frOm 9.9 TO 10.3), dISSOlVEd OxYgEn cOncEnTrATIOnS rAngIng frOm 7.8 TO 11.2 mg L–1 And ElEcTrIc cOndUcTIVITY rAngIng frOm 50 TO 112 µS cm–1). ThE SpEcIES hAS AlSO bEEn dETEcTEd In A dITch In An AgrO-fOrESTrY ArEA AT 550 m. A.S.l. And In An AnThrOpOgEnIc dISTUrbEd pOnd, In InTEnSIVElY mAnAgEd pASTUrElAnd AT 390 m. A.S.l. And ExhIbITIng lArgE cOVEr Of AQUATIc VEgETATIOn (mAInlY Potamogeton Spp. ).

World distribution. EUrOpE, ASIA And NOrTh AfrIcA (FErY 2003).

Azorean distribution. ThE SpEcIES IS prESEnT In SãO MIgUEl, SAnTA MArIA And fOr ThE fIrST TImE IS rEcOrdEd fOr TErcEIrA ISlAnd (SEE FIg. 1 ).

Figures

FIGURE1. NEW RECORDS fOR THEAZORES ISLANDS (LATITUDE 36º 55’–39° 43’ N; LONGITUDE 24° 45’–31°17’ W). COR CORVO ISLAND, TER TERCEIRA ISLAND,PIC PICO ISLAND AND SMG SãO MIGUEL ISLAND.