Poznajcie nagryzka ciemnego (Bromius obscurus) \u2013 fascynuj\u0105cego chrz\u0105szcza z rodziny stonkowatych, kt\u00f3ry jest jedynym przedstawicielem swojego rodzaju. Opisany po raz pierwszy przez legendarnego taksonoma Karola Linneusza w 1758 roku, ten holarktyczny gatunek jest szeroko rozpowszechniony w Ameryce P\u00f3\u0142nocnej, Europie i Azji. Doros\u0142e osobniki pozostawiaj\u0105 na li\u015bciach niezwykle charakterystyczny \u015blad: wygryzaj\u0105 w nich d\u0142ugie, pod\u0142u\u017cne szczeliny, kt\u00f3re do z\u0142udzenia przypominaj\u0105 \u015bcieg \u0142a\u0144cuszkowy, przez co mocno uszkodzona ziele\u0144 zaczyna wygl\u0105da\u0107 jak koronka. Ich cykl \u017cyciowy jest podzielony mi\u0119dzy dwa zupe\u0142nie r\u00f3\u017cne \u015bwiaty. Podczas gdy doros\u0142e chrz\u0105szcze \u017cyj\u0105 nad ziemi\u0105, \u017ceruj\u0105c na li\u015bciach winoro\u015bli, r\u00f3\u017c czy wierzb\u00f3wki kiprzycy, ich larwy bytuj\u0105 w podziemnych ciemno\u015bciach, dr\u0105\u017c\u0105c korytarze i podgryzaj\u0105c systemy korzeniowe. Co niezwykle intryguj\u0105ce, europejskie populacje tego gatunku s\u0105 w ca\u0142o\u015bci partenogenetyczne \u2013 co oznacza, \u017ce samice rozmna\u017caj\u0105 si\u0119 i sk\u0142adaj\u0105 zdolne do rozwoju jaja bez udzia\u0142u samc\u00f3w \u2013 podczas gdy populacje p\u00f3\u0142nocnoameryka\u0144skie rozmna\u017caj\u0105 si\u0119 p\u0142ciowo. Na tego historycznie wa\u017cnego i niezwykle osobliwego chrz\u0105szcza natkn\u0105\u0142em si\u0119 kilkukrotnie podczas moich czerwcowych w\u0119dr\u00f3wek po p\u00f3\u0142nocnej Szwecji w 2026 roku.<\/p>\n","protected":false},"excerpt":{"rendered":"
Poznajcie nagryzka ciemnego (Bromius obscurus) \u2013 fascynuj\u0105cego chrz\u0105szcza z rodziny stonkowatych, kt\u00f3ry jest jedynym przedstawicielem swojego rodzaju. 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