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Home > Suku

Petractis

Scientific name: Petractis

Petractis

Scientific name: Petractis

Description

Petractis on jäkälsuku, jota löytyy kalkkikivirockien pinnalta eri puolilla maailmaa. Se muodostaa ohuita, valkoisia tai vaaleanharmaita kerrostumia kallion pinnalle. Näillä jäkäliköillä on ainutlaatuisia, pieniä tulivuoria muistuttavia itiöemämiä, joissa on keskellä aukko ja ympärillä kohonnut reuna. Petractis edistää kallion pinnan hajoamista ajan myötä ja auttaa siten maanmuodostuksessa.

Species of Petractis

Petractis clausa

Tieteellinen luokittelu

Fylum

Luokka

Tilaa

Perhe

Suku

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