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Lapworthella
Taxonomy
Lapworthella was named by Cobbold (1921) [Sepkoski's age data: Cm Tomm-l Cm Tojo Sepkoski's reference number: 522,885,1006]. Its type is Lapworthella nigra.
It was assigned to Pteropoda by Cobbold (1921); to Problematica by Fisher (1962), Qian and Zhang (1983) and Duan (1984); to Tommotiida by Sepkoski (2002); and to Lapworthellidae by Rozanov and Missarzhevsky (1966), Landing (1984) and Landing et al. (2008).
It was assigned to Pteropoda by Cobbold (1921); to Problematica by Fisher (1962), Qian and Zhang (1983) and Duan (1984); to Tommotiida by Sepkoski (2002); and to Lapworthellidae by Rozanov and Missarzhevsky (1966), Landing (1984) and Landing et al. (2008).
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1921 | Lapworthella Cobbold p. 359 |
| 1935 | Stenothecopsis Cobbold p. 43 |
| 1962 | Lapworthella Fisher p. 138 |
| 1962 | Stenothecopsis Fisher p. 138 |
| 1966 | Lapworthella Rozanov and Missarzhevsky |
| 1983 | Lapworthella Qian and Zhang p. 88 |
| 1984 | Lapworthella Duan p. 164 |
| 1984 | Lapworthella Landing pp. 1392-1393 |
| 2002 | Lapworthella Sepkoski |
| 2002 | Stenothecopsis Sepkoski |
| 2008 | Lapworthella Landing et al. p. 900 |
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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. †Lapworthella Cobbold 1921
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†Lapworthella ablorta Duan 1984
†Lapworthella annulata Qian and Yin 1984
†Lapworthella cornu Wiman 1903
†Lapworthella dentata Missarzhevsky 1969
†Lapworthella fasciculata Bengtson et al. 1990
†Lapworthella gezhongwuensis Qian and Yin 1984
†Lapworthella hubeiensis Qian and Zhang 1983
†Lapworthella hubeinensis Qian and Zhang 1983
†Lapworthella nigra Cobbold 1921
†Lapworthella puttapensis Bengtson et al. 1990
†Lapworthella rostriptutea Qian 1978
†Lapworthella schodakensis Lochman 1956
†Lapworthella sinensis Duan 1984
†Lapworthella subrectangulata Duan 1984
Invalid names: Stenothecopsis Cobbold 1935 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E.S. Cobbold 1921 | Small, tapering, annulated shells of circular or sub-polygonal section, consisting of two layers, the timer one of medium thickness, the outer very thin and chitinous. Annulations formed by pronounced raised ridges encircle the tube, and divide it into sub-equal parts. | |
| E. Landing 1984 | Lapworthellids characterized by skeletons composed of highly variable sclerites with prominent transverse growth ridges; sclerites with or without 1) nodose or granular microsculpture on transverse sculpture, 2) longitudinal (radial) ridges, 3) adventitious septa. |
Measurements
No measurements are available
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| Source: o = order, c = class, p = phylum, uc = unranked clade | |||||
| References: Hendy et al. 2009, Kiessling 2004, Aberhan et al. 2004, Nesnidal et al. 2013 | |||||
Age range: base of the Meishucunian to the top of the Branchian or 530.70000 to 509.00000 Ma
Collections (94 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Nemakit-Daldynian | China (Hubei) | L. sp. (97556) | |
| Placentian | USA (Massachusetts) | L. ludvigseni (56832) | |
| Placentian | Canada (Nova Scotia) | L. ludvigseni (86745) | |
| Meishucunian | China (Hubei) | L. rostriplutea (107634 107636 107665) | |
| Meishucunian | China (Anhui) | L. sp. (107772) | |
| Meishucunian | China (Yunnan) | L. rete (96290 96291 96292) | |
| Meishucunian | China (Guizhou) | L. orientalis, L. annulata, L. gezhongwuensis (106512) | |
| Meishucunian | China (Shaanxi) | L. orientalis (107790) | |
| Meishucunian | China (Sichuan) | L. bella (107390) | |
| Meishucunian - Tommotian | China (Yunnan) | L. rete (96301) | |
| Tommotian | Russian Federation (Sakha) | L. tortuosa (232887 232888) | |
| Tommotian | USA (Massachusetts) | L. laudvigseni (56830) L. ludvigseni (56831) | |
| Tommotian | Russian Federation (Yakutiya) | L. bella (10041) L. bella, L. marginata (80951) L. tortuosa (80796 80804 80809 96251 96394) L. tortuosa, L. bella, L. lata, L. corniforma (80952) | |
| Tommotian | India | L. sp. (140175) | |
| Tommotian | Canada (Newfoundland and Labrador) | L. ludvigseni (87332 87334 87353 87365) | |
| Tommotian | Russian Federation (Khabarovsk Krai) | L. sp. (50370) | |
| Tommotian | Canada (Nova Scotia) | L. ludvigseni (9392 9393) | |
| Tommotian | Russian Federation (Yakutia) | L. bella (10067) L. tortuosa (96245) | |
| Tommotian | Russian Federation (Krasnoyarskiy Kray) | L. bella (80841) | |
| Tommotian | Russian Federation (Siberia) | L. tortuosa (50432) | |
| Atdabanian | Russian Federation (Krasnoyarskiy Kray) | L. bella (80843) | |
| Atdabanian | China | L. rete (8331) L. sp. (8332) | |
| Atdabanian | Australia (South Australia) | L. fascicuata (97739 97740 97741) L. fasciculata (96454 96920 97746 97747 97748 97749 97750 97769 97783) L. puttapensis (97791) | |
| Atdabanian | United Kingdom (England) | L. morphotype B, L. morphotype C (79933) L. morphotype C (79934) | |
| Atdabanian | Russian Federation (Siberia) | L. miranda (232892) | |
| Atdabanian | Mongolia | L. tortuosa (219046) | |
| Nangaoian - Atdabanian | China (Yunnan) | L. rete (96446) | |
| Nangaoian | China (Henan) | Obtusoconus rostriptutea (96525) | |
| Atdabanian - Botomian | Canada (Nova Scotia) | L. sp. (9391) | |
| Atdabanian - Botomian | Antarctica (South Shetland Islands) | L. fasciculata (49691) | |
| Branchian | Canada (New Brunswick) | L. cornu (84379 84395 84396) | |
| Branchian | United Kingdom (England) | L. morphotype A (79936) L. morphotype A, L. morphotype B, L. morphotype C (79928) L. morphotype A, L. morphotype B, L. morphotype C, L. dentata (79931) L. morphotype A, L. morphotype C (79932) L. morphotype B, L. morphotype C (79937) L. morphotype C (79939) | |
| Botomian | Mongolia (Altaï) | L. sp. (8260) | |
| Botomian | Australia (South Australia) | L. fasciculata (96916 96917 96958 96959 96965 97701 97751 97770 97773 97774 97775 97777 172616 172620) | |
| Botomian - Lenian | Mongolia | L. nigra (9994) | |
| Lenian | Sweden | L. bornholmiensis (87124 87184) | |
| Dyeran | USA (New York) | L. schodackensis (78763 78765 78767 171821) | |
| Solvan | Morocco (High Atlas) | Stenothecopsis n. sp. (50548) |