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Gastropoda - Bellerophontida

Tropidodiscoidea was named by Knight (1956) [nom. transl. Wagner 2006]. It is not extant.

It was assigned to Bellerophontida by Wagner (2017).

Synonymy list
YearName and author
1956Tropidodiscoidea Knight
2017Tropidodiscoidea Wagner

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EubilateriaAx 1987
classGastropodaCuvier 1797
orderBellerophontidaUlrich and Scofield 1897

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: aragoniteo
Composition 2: low Mg calciteo
Locomotion: slow-movingo
Life habit: low-level epifaunalo
Diet: detritivoreo
Vision: limitedc
Created: 2007-09-18 08:53:22
Modified: 2009-10-11 15:09:03
Source: o = order, c = class
Reference: Kiessling 2004

Age range: base of the Furongian to the top of the Changhsingian or 497.00000 to 252.17000 Ma

Collections (309 total)

Oldest occurrences

Time interval Ma Country or state Original ID and collection number
Dresbachian501.0 - 485.4USA (Missouri) Strepsodiscus major (9625 158316)
Dresbachian501.0 - 485.4Antarctica (Elsemere Island) Euomphalus splettstoesseri (99793 99795)
Franconian501.0 - 485.4USA (Colorado) Strepsodiscus major (56818)
Steptoean501.0 - 485.4USA (Minnesota) Euomphalus strongi, Hypseloconus franconiensis (156300)
Trempealeauan501.0 - 485.4USA (New York) Pelagiella hoyti (74540)
Trempealeauan501.0 - 485.4USA (Missouri) Strepsodiscus paucivoluta (8232 8695)
Sunwaptan498.5 - 485.4Canada (Quebec) Chalarostrepsis praecursor (56819)
Furongian497.0 - 485.4Argentina Strepsodiscus austrinus (85006 85007)
Furongian497.0 - 485.4China (Shandong) Pelagiella pagoda (157404)
Cressagian485.4 - 478.6United Kingdom (England) Bellerophon shinetonensis (3711)

Youngest occurrences

Time interval Ma Country or state PBDB collection number
Missourian305.9 - 303.4USA (Oklahoma) Sinuitina sp. (143) Tropidocyclus cordiformis (157965 160139)
Virgilian303.4 - 298.9USA (Oklahoma) Sinuitina sp. (176)
Sakmarian295.5 - 290.1India (Kashmir) Tropidocyclus sp. (86542)
Artinskian290.1 - 279.3Argentina (Chubut) Sinuitina tenuis, Sinuitina gonzalezi (152898)
Kungurian279.3 - 272.3USA (Texas) Sinuitina keytei (121497)
Wuchiapingian259.9 - 254.17Pakistan Bellerophon punjabicus (125928 126699 126940)
Wuchiapingian259.9 - 254.17China (Guizhou) Tropidodiscus incertus (112116)
Wuchiapingian - Changhsingian259.9 - 252.17Pakistan Bellerophon punjabicus (126709 126985)
Changhsingian254.17 - 252.17Pakistan Bellerophon punjabicus (126882 126883 126887 126889 126898 126981)
Changhsingian254.17 - 252.17China (Guizhou) Tropidodiscus incertus, Sinuitina parva (112113)