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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. |