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Leptodus
Taxonomy
Leptodus was named by Kayser (1883) [Sepkoski's age data: P Leon-m P Dora Sepkoski's reference number: 7,936].
It was reranked as Lyttonia (Leptodus) by Reed (1931).
It was assigned to Lyttonia by Reed (1931); to Lyttoniinae by Williams et al. (2000); and to Strophomenida by Sepkoski (2002).
It was reranked as Lyttonia (Leptodus) by Reed (1931).
It was assigned to Lyttonia by Reed (1931); to Lyttoniinae by Williams et al. (2000); and to Strophomenida by Sepkoski (2002).
Species
L. cancriniformis, L. deminutus, L. elongatus, L. guadalupensis, L. hemisphaericus, L. hoshanensis, L. huangi, L. kaluzinensis, L. lacuna, L. lamina, L. minor, L. nobilis (syn. Semigublerina flabelata, Semigublerina gabata, Semigublerina ovata, Gubleria armenica), L. oldhaminoides, L. ovatus, L. richthofeni, L. trapezium, L. tumenlingensis, L. wuchangensis, Lyttonia (Digitia), Lyttonia (Imperia), Lyttonia (Irma), Lyttonia (Prisca), Lyttonia (Stita), Lyttonia (Vincia), Poikilosakos tongluensis, Spinolyttonia arakeljani
Species lacking formal opinion data
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1883 | Leptodus Kayser p. 161 |
| 1883 | Lyttonia Waagen p. 396 |
| 1916 | Oldhamina (Lyttonia) Fredericks |
| 1931 | Lyttonia (Leptodus) Reed p. 39 |
| 1964 | Spinolyttonia Sarycheva |
| 1990 | Poikilosakos tongluensis Liang p. 222 figs. Pl 40, fig 8 |
| 1990 | Leptodus lamina Liang p. 224 figs. Pl 40, fig 12 |
| 1990 | Juxoldhamina Liang p. 235 |
| 2000 | Leptodus Williams et al. p. 631 |
| 2002 | Leptodus Sepkoski |
| 2002 | Lyttonia Sepkoski |
| 2002 | Spinolyttonia 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. †Leptodus Kayser 1883
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†Leptodus cancriniformis Liao 1980
†Leptodus deminutus Liao 1980
†Leptodus elongatus Jin and Hu 1982
†Leptodus guadalupensis Girty 1909
†Leptodus hemisphaericus Lee and Gu 1980
†Leptodus hoshanensis Huang 1936
†Leptodus huangi Shen et al. 1992
†Leptodus kaluzinensis Licharew and Kotlyar 1978
†Leptodus lacuna Liang 1990
†Leptodus minor Lee and Gu 1980
†Leptodus nobilis Waagen 1883
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Invalid names: Gubleria armenica Sarycheva 1964 [synonym], Semigublerina flabelata Liang 1990 [synonym], Semigublerina gabata Liang 1990 [synonym], Semigublerina ovata Liang 1990 [synonym]
†Leptodus oldhaminoides Kotlyar 1989
†Leptodus ovatus Lee and Gu 1980
†Leptodus richthofeni Kayser 1883
†Leptodus trapezium Termier et al. 1974
†Leptodus tumenlingensis Lee and Gu 1980
†Leptodus wuchangensis Lee and Gu 1980
Invalid names: Juxoldhamina Liang 1990 [synonym], Leptodus lamina Liang 1990 [nomen dubium], Lyttonia Waagen 1883 [synonym], Poikilosakos tongluensis Liang 1990 [nomen dubium], Spinolyttonia Sarycheva 1964 [synonym]
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| valve height | 2 | 10.6 | 5.80 | 19.6 | 12.7 | 9.72 |
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| Source: subo = suborder, c = class, p = phylum | |||||
| References: Williams et al. 2000, Aberhan et al. 2004 | |||||
Age range: base of the Sakmarian to the top of the Cenomanian or 293.52000 to 93.90000 Ma
Collections (404 total)
Oldest occurrences | |||
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Gzhelian - Cisuralian | USA (California) | L. sp. (143626) | |
| Sakmarian | China (Guangxi) | L. sp., L. nobilis (134321) | |
| Artinskian | Afghanistan | L. sp. (94962) | |
| Artinskian - Kungurian | USA (Texas) | Lyttonia americana (151270) | |
| Kungurian | USA (Oregon) | L. sp. 1 (40978) | |
| Kungurian | USA (Texas) | L. sp. (122229) Lyttonia americana (108395 108399 113193 113216 121457 149773 149777 149778 149782 149787 149860 149863 149931 149934 149983 149997 150244 150245 150251 150259 150556 150557 150562 150666 150810 150842 150847 151233 151236 151269 151271) | |
| Kungurian | China (Sichuan) | L. sp. (153926 153928) | |
| Kungurian | China (Hunan) | L. sp. (100061) | |
| Kungurian | China (Xizang) | L. richthofeni (118916) | |
| Roadian | Japan | L. nobilis (75527 118924) | |
Youngest occurrences |
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| Time interval | Ma | Country or state | PBDB collection number |
| Changhsingian | Iran | L. nobilis (125579 125602 125638 125639 125660) L. sp. (63893) | |
| Changhsingian | Thailand (Khao Doi Pha Phlung) | L. sp. (8103) | |
| Changhsingian | China (Sichuan) | L. deminutus (95285) L. nobilis (103467) L. sp. (36221 73823 95282 95301 95599 149080) | |
| Changhsingian | Pakistan | Lyttonia nobilis (126887) Lyttonia sp. (126934) | |
| Changhsingian | China (Xizang) | L. nobilis (187558) | |
| Changhsingian | China (Anhui) | L. sp. (136860) | |
| Changhsingian | China (Fujian) | L. nobilis (51430 121428) L. sp. (121429 148572) | |
| Changhsingian | China (Guangdong) | L. richthofeni (109783) | |
| Cenomanian | USA (Kansas) | Prisca sp. (32610 32613 32692 32696) | |
| Cenomanian - Cretaceous | USA (Kansas) | Prisca sp. (32655) | |