|Daughter taxa: (blue => in age window 0-800Ma)|
Catalog entries: Hyalolithus
Original description: Cell with a haptonema and covered by hat-shaped siliceous scales. The central area of scales bulging, having many pores. The brim of scales recurved, not perforated.
Last occurrence (top): Extant Data source: Total of range of species in this database
First occurrence (base): within Lutetian Stage (41.15-47.84Ma, base in Lutetian stage). Data source: Total of range of species in this database
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