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Cyrtorostra
Taxonomy
Cyrtorostra was named by Branson (1930) [Sepkoski's age data: P Sakm Tr Indu-l Sepkoski's reference number: 1066]. It is not extant.
It was assigned to Cyrtorostridae by Newell and Boyd (1995); to Pterioida by Sepkoski (2002); and to Cyrtorostrinae by Bouchet et al. (2010).
It was assigned to Cyrtorostridae by Newell and Boyd (1995); to Pterioida by Sepkoski (2002); and to Cyrtorostrinae by Bouchet et al. (2010).
Synonymy list
| Year | Name and author |
|---|---|
| 1930 | Cyrtorostra Branson |
| 1995 | Cyrtorostra Newell and Boyd p. 62 |
| 2002 | Cyrtorostra Sepkoski |
| 2010 | Cyrtorostra Bouchet et al. |
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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. †Cyrtorostra Branson 1930
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†Cyrtorostra atavum Waagen 1881
†Cyrtorostra cardiiformis Reed 1931
†Cyrtorostra caucasica Licharew 1939
†Cyrtorostra fraterna Reed 1944
†Cyrtorostra jisuensis Grabau 1931
†Cyrtorostra limitans Waterhouse 1987
†Cyrtorostra lunwalensis Reed 1944
†Cyrtorostra nana Biakov 2002
†Cyrtorostra obeliscus Liang 1980
†Cyrtorostra omanensis Dickins 1999
†Cyrtorostra primorica Kushnar 1986
†Cyrtorostra subexotica Waagen 1881
†Cyrtorostra trifurcata Reed 1944
†Cyrtorostra varicostata Branson 1930
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Invalid names: Aviculopecten alatus Branson 1930 [synonym], Aviculopecten alternatus Branson 1930 [synonym]
Diagnosis
No diagnoses are available
Measurements
| part | N | mean | minimum | maximum | median | s.d. | |
|---|---|---|---|---|---|---|---|
| height | 10 | 18.9 | 12.3 | 30.3 | 18.7 | 5.02 | |
| shell height | 4 | 11.1 | 10.3 | 12.3 | 11.0 | 0.972 | |
| valve height | 33 | 11.5 | 0.956 | 45.0 | 15.0 | 12.4 |
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| Source: o = order, c = class | |||||
| References: Kiessling 2004, Aberhan et al. 2004 | |||||
Age range: base of the Asselian to the top of the Changhsingian or 298.90000 to 252.17000 Ma
Collections (138 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Asselian | USA (Texas) | C. varicostata (43481) | |
| Asselian | Mexico | C. varicostata (117974) | |
| Artinskian | Australia (Queensland) | C. limitans (66256 120380 120637) C. sp. (39937) | |
| Kungurian | USA (Texas) | C. varicostata (43491 43494 43495 43513 43515 43517 43574 81651 101785 105839 105931 105935 105940) | |
| Kungurian | Mongolia | C. laticostata (116274) | |
| Kungurian | Russian Federation | C. laticostata (101683 109961 113905 114308) | |
| Roadian | Russian Federation | C. laticostata (102395 109928 109947 109949 109963 109964 109967 109971 113900) C. sp. (113981) | |
| Roadian | Canada (Nunavut) | C. arctica (11089 112857) | |
| Roadian | USA (Texas) | C. varicostata (43512 43548 43553 43563 44242 81650 81693 101782 101783 101807 102603 102606 102611 102615 105874) | |
| Wordian | Japan | C. lunwalensis (114493) | |
| Wordian | USA (Texas) | C. varicostata (43550 43552 101867 105764 105977 106105) | |
| Wordian | China (Nei Mongol) | Conocardium jisuensis (109091 109180) C. jisuensis (111767) | |
| Wordian | USA (Montana) | Aviculopecten alternatus (11276) | |
| Wordian | Oman | C. omanensis (107351) | |
| Wordian | USA (Wyoming) | Aviculopecten alternatus (11225 11226) | |
| Wordian - Capitanian | China (Nei Mongol) | C. obeliscus, C. jisuensis (95802) | |
| Capitanian | USA (Texas) | C. varicostata (106249) | |
| Capitanian | USA (Montana) | C. varicostata (105348) | |
| Capitanian | USA (Utah) | C. sp. (39549) | |
| Capitanian | Russian Federation | C. caucasica (111024) C. lunwalensis (144351) C. nana (102157) C. primorica (86168) | |
| Wuchiapingian | India | Oxytoma laticostatum (230621 230622) | |
| Wuchiapingian | USA (Utah) | C. sp. (39720) | |
| Wuchiapingian | Greece | C. sp. (64176) | |
| Wuchiapingian | USA (Wyoming) | C. varicostata (82599 96806 105279 105290 105350 105366 105510) C. varicostata, Aviculopecten alternatus (11228) | |
| Wuchiapingian | USA (Montana) | C. varicostata (105338) | |
| Wuchiapingian | Australia (Queensland) | C. laticostata (98097 98100 101570 120336 120338 120339 120340 120661) | |
| Wuchiapingian | Pakistan | Blanfordinia cardiiformis (126263) Blanfordinia fraterna (125895) Blanfordinia fraterna, Blanfordinia subexotica (125897) Blanfordinia lunwalensis (125891 125898 125901 125910 126264) Blanfordinia lunwalensis, Blanfordinia cardiiformis (125908) Blanfordinia trifurcata (125909 127025) Oxytoma atavum (89228 90253 119518) | |
| Wuchiapingian | Australia (Western Australia) | C. sp. (39908) | |
| Wuchiapingian | USA (Idaho) | C. varicostata (96807) | |
| Wuchiapingian | USA (Nevada) | C. sp. (39437 39446 39451 39466 39514 39758 39767) | |
| Wuchiapingian | Greenland | C. sp. (86565) | |
| Lopingian | USA (Montana) | Aviculopecten alternatus (11273) C. varicostata (105370) | |
| Lopingian | USA (Wyoming) | Aviculopecten alatus (87156) C. varicostata (82435 87294 96805 105344 105362 105363) C. varicostata, Aviculopecten alternatus (11223 87153) | |
| Changhsingian | Pakistan | Aviculopecten subexoticus (89061) Blanfordinia lunwalensis (126989) Blanfordinia subexotica (126882 126934) | |
| Changhsingian | India (Kashmir) | C. lunwalensis (115374) | |
| Changhsingian | Nepal | C. sp. (43257) | |
| Changhsingian - Griesbachian | India (Kashmir) | C. lunwalensis (50044 50045 50046) |