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Conotheca
Taxonomy
Conotheca was named by Rozanov et al. (1969) [Missarzhevsky in Rozanov et al. 1969; Sepkoski's age data: V N-Da-u Cm Boto-u Sepkoski's reference number: 268,885,1030]. Its type is Conotheca mammilata.
It was assigned to Calyptoptomatida by Duan (1984); to Circothecida by Sepkoski (2002); to Coleolidae by Malinky and Skovsted (2004); to Circothecidae by Rozanov et al. (1969), Azmi and Pancholi (1983), Bengtson et al. (1990) and Parkhaev and Demidenko (2010); and to Orthothecida by Landing and Bartowski (1996) and Kouchinsky et al. (2017).
It was assigned to Calyptoptomatida by Duan (1984); to Circothecida by Sepkoski (2002); to Coleolidae by Malinky and Skovsted (2004); to Circothecidae by Rozanov et al. (1969), Azmi and Pancholi (1983), Bengtson et al. (1990) and Parkhaev and Demidenko (2010); and to Orthothecida by Landing and Bartowski (1996) and Kouchinsky et al. (2017).
Species
C. australiensis (syn. C. laurentiensis), C. brevica, C. circumflexa, C. corniformis, C. curta, C. dahaiensis, C. mammilata (syn. Edgetheca aldanica) (type species), C. ningqiangensis, C. rotunda, C. shennongjiaensis, C. subcurvata (syn. Circotheca maidipingensis, Ovalitheca acuticostata, Circotheca nana, Circotheca longiconica, Circotheca obesa, Paracircotheca zhaojiabaensis, Circotheca multisulcata)
Synonyms
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Synonymy list
| Year | Name and author |
|---|---|
| 1969 | Conotheca Rozanov et al. pp. 134-135 |
| 1969 | Edgetheca Rozanov et al. p. 142 |
| 1983 | Conotheca Azmi and Pancholi p. 368 |
| 1984 | Conotheca Duan p. 162 |
| 1990 | Conotheca Bengtson et al. p. 213 |
| 1996 | Conotheca Landing and Bartowski p. 756 |
| 2002 | Conotheca Sepkoski |
| 2004 | Conotheca Malinky and Skovsted p. 570 |
| 2010 | Conotheca Parkhaev and Demidenko p. 931 |
| 2017 | Conotheca Kouchinsky et al. p. 391 |
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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. †Conotheca Rozanov et al. 1969
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†Conotheca australiensis Bengtson et al. 1990
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Invalid names: Conotheca laurentiensis Landing and Bartowski 1996 [synonym]
†Conotheca brevica Qian et al. 2001
†Conotheca circumflexa Rozanov et al. 1969
†Conotheca corniformis Missarzhevsky and Mambetov 1981
†Conotheca curta Missarzhevsky 1980
†Conotheca dahaiensis Jiang, in Luo et al. 1982
†Conotheca mammilata Rozanov et al. 1969
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Invalid names: Edgetheca aldanica Rozanov et al. 1969 [synonym]
†Conotheca ningqiangensis Qian et al. 2001
†Conotheca rotunda Qian et al. 2000
†Conotheca shennongjiaensis Duan 1984
†Conotheca subcurvata Yü 1974
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Invalid names: Circotheca longiconica Qian 1978 [synonym], Circotheca maidipingensis Yu 1974 [synonym], Circotheca multisulcata Qian 1978 [synonym], Circotheca nana Qian 1978 [synonym], Circotheca obesa Qian 1978 [synonym], Ovalitheca acuticostata Xing and Yue 1984 [synonym], Paracircotheca zhaojiabaensis Qian 1989 [synonym]
Invalid names: Edgetheca Rozanov et al. 1969 [synonym]
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| J. M. Malinky and C.B. Skovsted 2004 | Shell conical with circular cross−section and
transverse elements of sculpture on the exterior; aperture pla− nar and operculum with cardinal processes and circular ridges on interior. | |
| P. Y. Parkhaev and Y. Demidenko 2010 | "Narrow conical shell with circular cross-section. Initial part of shell slightly swollen. Aperture straight or almost straight. Ornamentation represented by prominent growth lines." |