Annotated checklist of aquatic beetles (Coleoptera) and true bugs (Heteroptera) in the Azores Islands: new records and corrections of colonization status Author Lamelas-López, Lucas Author Raposeiro, Pedro Miguel Author Borges, Paulo A. V. Author Florencio, Margarita text Zootaxa 2017 2017-11-22 4353 1 117 132 journal article 31357 10.11646/zootaxa.4353.1.7 23a22e38-f32b-44da-905b-6b352ff74843 1175-5326 1064562 FE581F19-7FAA-4F1F-B562-2718D4213237 Gyrinus distinctus Aubé, 1836 Material. FIVE AdUlT SpEcImEnS And OnE lArVA. COllEcTEd On 23/V/2014 . "LAgOA FUndA" - TErcEIrA ISlAnd . UTM: 26 S 472391 4287599. Habitat. Gyrinus distinctus InhAbITS In lAkES (FrIdAY 1988), cOASTAl ArEAS Of ThE rESErVOIrS And In SlOW-mOVIng rIVErS, In frESh Or brAckISh WATErS (SVEnSSOn 1977; KıYAk et al. 2006). DUE TO ITS AbIlITY TO flY, ThE SpEcIES cAn dISpErSE TO OThEr pOndS WhEn ThE OrIgInAl hAbITATS drY OUT (DOnISThOrpE 1913). Azorean habitat. WE hAVE fOUnd ThIS SpEcIES OnlY In "LAgOA FUndA", WhIch IS A frEShWATEr pErmAnEnT pOnd nEAr TO nATIVE VEgETATIOn pATchES, In ThE "RESErVA NATUrAl InTEgrAl dE SAnTA BÁrbArA", ApprOxImATElY AT 850 m . A.S.l. ThIS pOnd hAd AcIdIc WATErS (pH VAlUE Of 5.5), WATEr ElEcTrIc cOndUcTIVITY Of 28.0 µS cm–1 And dISSOlVEd OxYgEn cOncEnTrATIOn Of 8.3 mg L–1. World distribution. ThIS SpEcIES IS WIdESprEAd And dISTrIbUTEd In EUrOpE, ASIA And RUSSIA (ZAITSEV 1972; BrInck 1978; FrAncIScOlO 1979; GUEOrgUIEV 1981; HOlmEn 1987). Azorean distribution. ThIS SpEcIES hAS bEEn dETEcTEd In ThE SãO MIgUEl, SAnTA MArIA, PIcO, FAIAl And FlOrES ISlAndS. ThE nEW rEcOrd cOnfIrmS ThE prESEncE In TErcEIrA ISlAnd (SEE FIg. 1 ).