Lesson plan
Polyblastidium
Polyblastidium is a genus of foliose lichens in the family Physciaceae. It has 18 species. The genus was circumscribed by German lichenologist Klaus Kalb in 2015, with Polyblastidium japonicum assigned as the type species. Polyblastidium is similar in morphology to Heterodermia, but its lower surface is cobweb-like in structure (arachnoid), and its ascospores are mostly 1-septate with 1 to 3 sporoblastidia (small subsidiary cavities). It is this latter feature that is referenced in the genus name Polyblastidium (poly = "many" + sporoblastidia). The genus contains several species that were formerly classified in the genus Anaptychia (section Polyblastidium series Polyblastidium).
Article summary
Polyblastidium is a genus of foliose lichens in the family Physciaceae. It has 18 species. The genus was circumscribed by German lichenologist Klaus Kalb in 2015, with Polyblastidium japonicum assigned as the type species. Polyblastidium is similar in morphology to Heterodermia, but its lower surface is cobweb-like in structure (arachnoid), and its ascospores are mostly 1-septate with 1 to 3 sporoblastidia (small subsidiary cavities). It is this latter feature that is referenced in the genus name Polyblastidium (poly = "many" + sporoblastidia). The genus contains several species that were formerly classified in the genus Anaptychia (section Polyblastidium series Polyblastidium).
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
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- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
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