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Williamia

Gastropoda - Siphonariidae

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).

Synonymy list
YearName and author
1884Williamia Monterosato p. 150
1928Williamia Woodring p. 111
2001Williamia Todd
2002Williamia Sepkoski

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RankNameAuthor
kingdomAnimalia()
Bilateria
EubilateriaAx 1987
Protostomia
Spiralia
superphylumLophotrochozoa
phylumMollusca
RankNameAuthor
classGastropoda
subclassPulmonataCuvier 1817
Basommatophora(Keferstein 1864)
superfamilySiphonarioideaGray 1840
familySiphonariidaeGray 1840
genusWilliamiaMonterosato 1884

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
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Invalid names: Williamia vernalis Dall 1870 [synonym]
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: aragonitesubc
Environment: terrestrialsubc
Locomotion: facultatively mobilef
Attached: yesf
Life habit: epifaunalf
Diet: grazerf
Vision: limitedc
Created: 2009-09-10 08:43:16
Modified: 2009-09-10 10:46:07
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

Collections (14 total)


Time interval Ma Country or state Original ID and collection number
Early/Lower Oligocene33.9 - 28.4France (Essonne) W. megapolitana (9180)
Aquitanian23.03 - 20.44France W. merignacensis (74861)
Burdigalian20.44 - 15.97Italy W. gussoni (178108)
Late/Upper Pliocene3.6 - 2.588Jamaica W. parva (58522)
Early/Lower Pleistocene2.588 - 0.781New Zealand (Kermadec Islands) W. radiata (85097)
Early/Lower Pleistocene2.588 - 0.781Italy W. gussonii (78312)
Middle Pleistocene0.781 - 0.126USA (California) W. peltoides (202973) W. vernalis (138723)
Late/Upper Pleistocene0.126 - 0.0117Ecuador W. galapagana (96867)
Late/Upper Pleistocene0.126 - 0.0117USA (California) W. peltoides (59063 96566 160361 219029) W. vernalis (202936)