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Gastropoda -

Synonymy list
YearName and author
1997Orthogastropoda Ponder and Lindberg
1998Orthogastropoda Beesley p. 652
2001Orthogastropoda Lozouet et al. p. 16
2003Orthogastropoda Jeffery
2004Orthogastropoda Harzhauser p. 105
2007Orthogastropoda Harzhauser p. 83

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EubilateriaAx 1987
classGastropodaCuvier 1797

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.

No diagnoses are available
No measurements are available
Composition: aragonitec
Locomotion: actively mobilec
Life habit: epifaunalc
Vision: limitedc
Created: 2004-02-29 11:40:59
Modified: 2010-02-11 01:35:02
Source: c = class
Reference: Kiessling 2004

Age range

Maximum range based only on fossils: base of the Sunwaptan to the top of the Holocene or 498.50000 to 0.00000 Ma
Minimum age of oldest fossil (stem group age): 485.4 Ma

Collections (8822 total)

Oldest occurrences

Time interval Ma Country or state Original ID and collection number
Sunwaptan498.5 - 485.4USA (New York) Pleurotomariacea gen. indet (85187)
Demingian485.4 - 478.6USA (New Mexico) Hormotoma zelleri (56479 56481 56482)
Migneintian485.4 - 478.6USA (Missouri) Hormotoma gracilis (50204) Plethospira extensa (50202)
Stairsian485.4 - 478.6USA (Vermont) Murchisonia confusa, Holopea turgida (154943) Murchisonia gracilens (154942)
Stairsian485.4 - 478.6USA (New York) Plethospira bilineata, Plethospira subangulata (289)
Tremadoc485.4 - 477.7China (HeBei) Murchisonia sp. (7983)
Tremadoc485.4 - 477.7USA (Montana) Plethospira sp. (275)
Stairsian - Tulean485.4 - 471.8United Kingdom (Scotland) Murchisonia gracillima (188696)
Tulean485.4 - 471.8USA (Utah) Hormotoma sp. (104072 104113)
Tulean485.4 - 471.8USA (Montana) Plethospira sp. indet. (174361) Plethospira sp., Hormotoma sp. (287)
Tulean - Blackhillsian485.4 - 471.8United Kingdom (Scotland) Murchisona artemesia, Murchisonia gracillima (188715) Murchisonia anna, Murchisonia gracillima (188697) Pleurotomaria turgida (188699)
Early/Lower Ordovician485.4 - 470.0USA (New York) Hormotoma sp. (290)
Early/Lower Ordovician485.4 - 470.0USA (Texas) Plethospira sp., Hormotoma sp. (283 293)
Tremadoc - Floian485.4 - 470.0USA (Utah) Plethospira sp., Loxonema sp. (154882)
Jefferson485.4 - 468.1USA (Oklahoma) Hormotoma sp. (80100 80101)
Jefferson485.4 - 468.1USA (Texas) Hormotoma moderata, Plethospira rotunda (56486)
Jefferson485.4 - 468.1USA (Missouri) Hormotoma dubia (56503 56504)
Jeffersonian485.4 - 468.1USA (Texas) Hormotoma sp. (80088) Plethospira sp., Hormotoma sp. (56489)
Early/Lower Ordovician - Middle Ordovician485.4 - 458.4USA (Alaska) Murchisoniidae indet., Pleurotomariacea indet. (101838)
Ordovician485.4 - 443.4USA (New York) Liospira sp., Subulites sp., Hormotoma sp. (332)