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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), Grant, IV and Gale (1931), Todd (2001); and to Basommatophora by Sepkoski (2002).
It was assigned to Siphonariidae by Woodring (1928), Grant, IV and Gale (1931), Todd (2001); and to Basommatophora by Sepkoski (2002).
Species
Synonymy list
| Year | Name and author |
|---|---|
| 1884 | Williamia Monterosato p. 150 |
| 1928 | Williamia Woodring p. 111 |
| 1931 | Williamia Grant, IV and Gale p. 463 |
| 2001 | Williamia Todd |
| 2002 | Williamia Sepkoski |
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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.
G. Williamia Monterosato 1884
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†Williamia parva Woodring 1928
Williamia peltoides Carpenter 1864 [shield false limpet]
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Invalid names: Williamia vernalis Dall 1870 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
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| Source: f = family, subc = subclass, c = class | |||||
| References: Hendy et al. 2009, Kiessling 2004 | |||||
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): 27.3 Ma
Minimum age of oldest fossil (stem group age): 27.3 Ma
Collections (15 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| 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 | Italy | W. gussonii (78312) | |
| Early/Lower Pleistocene | New Zealand (Kermadec Islands) | W. radiata (85097) | |
| Pleistocene | USA (California) | W. sp. (237610) | |
| Middle Pleistocene | USA (California) | W. peltoides (202973) W. vernalis (138723) | |
| Late/Upper Pleistocene | USA (California) | W. peltoides (59063 96566 160361 219029) W. vernalis (202936) | |
| Late/Upper Pleistocene | Ecuador | W. galapagana (96867) |