Basic info | Taxonomic history | Classification | Included Taxa |
Morphology | Ecology and taphonomy | External Literature Search | Age range and collections |
Williamia
Taxonomy
Williamia was named by Monterosato (1884) [Sepkoski's age data: T Eo R]. It is extant.
It was assigned to Siphonariidae by Woodring (1928) and Todd (2001); and to Basommatophora by Sepkoski (2002).
It was assigned to Siphonariidae by Woodring (1928) and Todd (2001); and to Basommatophora by Sepkoski (2002).
Species
Synonymy list
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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Source: f = family, subc = subclass, c = class | |||||
References: Kiessling 2004, Hendy et al. 2009 |
Age range
Maximum range based only on fossils: base of the Early/Lower Oligocene to the top of the Late/Upper Pleistocene or 33.90000 to 0.01170 Ma
Minimum age of oldest fossil (stem group age): 28.4 Ma
Minimum age of oldest fossil (stem group age): 28.4 Ma
Collections (14 total)
Time interval | Ma | Country or state | Original ID and collection number |
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Early/Lower Oligocene | France (Essonne) | W. megapolitana (9180) | |
Aquitanian | France | W. merignacensis (74861) | |
Burdigalian | Italy | W. gussoni (178108) | |
Late/Upper Pliocene | Jamaica | W. parva (58522) | |
Early/Lower Pleistocene | New Zealand (Kermadec Islands) | W. radiata (85097) | |
Early/Lower Pleistocene | Italy | W. gussonii (78312) | |
Middle Pleistocene | USA (California) | W. peltoides (202973) W. vernalis (138723) | |
Late/Upper Pleistocene | Ecuador | W. galapagana (96867) | |
Late/Upper Pleistocene | USA (California) | W. peltoides (59063 96566 160361 219029) W. vernalis (202936) |