Lesson plan
Fasciculus
Fasciculus is an extinct genus of stem-group ctenophores. It contains one species: the type species Fasciculus vesanus, known only from the holotype USNM 139215, found in the Phyllopod bed of the Burgess Shale. F. vesanus is unique among both crown-group and stem-group ctenophores for its large number of comb rows (80 comb rows in total) that were arranged in central and marginal zones rather than radially as in other ctenophores.
Article summary
Fasciculus is an extinct genus of stem-group ctenophores. It contains one species: the type species Fasciculus vesanus, known only from the holotype USNM 139215, found in the Phyllopod bed of the Burgess Shale. F. vesanus is unique among both crown-group and stem-group ctenophores for its large number of comb rows (80 comb rows in total) that were arranged in central and marginal zones rather than radially as in other ctenophores.
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- 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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