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Pseudophalacroma
Taxonomy
Pseudophalacroma was named by Pokrovskaya (1958) [non Jörgensen, 1883, a dinoflagellid protist]. It is not extant. Its type is Phalacroma dubium.
It was replaced with Yakutiana by Özdikmen (2009); it was misspelled as Pseudophalocroma by Peng et al. (2009), Naimark and Pegel (2017).
It was assigned to Ptychagnostidae by Jell and Adrain (2002), Peng et al. (2009), Naimark and Pegel (2017).
It was replaced with Yakutiana by Özdikmen (2009); it was misspelled as Pseudophalocroma by Peng et al. (2009), Naimark and Pegel (2017).
It was assigned to Ptychagnostidae by Jell and Adrain (2002), Peng et al. (2009), Naimark and Pegel (2017).
Synonymy list
| Year | Name and author |
|---|---|
| 1958 | Pseudophalacroma Pokrovskaya |
| 2002 | Pseudophalacroma Jell and Adrain p. 434 |
| 2009 | Pseudophalocroma Peng et al. |
| 2017 | Pseudophalacroma Naimark and Pegel p. 1184 |
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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. †Pseudophalacroma Pokrovskaya 1958
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†Pseudophalacroma dubium Whitehouse 1936
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Invalid names: Pseudophalacroma crebra Pokrovskaya 1958 [synonym]
†Pseudophalacroma ovale Yang 1982
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Invalid names: Pseudophalacroma triangularis Ju 1983 [synonym]
†Pseudophalacroma scanense Westergard 1946
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| E. B. Naimark and T. V. Pegel 2017 | Cephalon with very narrow border structures, glabella moderately high; axial furrows effaced, except part outlining basal lobes; median node usually absent. Pygidium with high acrolobe, with convex or slightly flattened border, widened at rear, nonspinose, border furrow deliquiate and moderately wide; axis outlined at M1, sometimes with vestiges of M2 and M3; axial node very small. |
Measurements
No measurements are available
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| Source: f = family, o = order | |||||
| References: Kiessling 2004, Hendy 2009 | |||||
Age range: base of the Zhanaarykian to the top of the Boomerangian or 503.00000 to 499.00000 Ma
Collections (41 total)
| Time interval | Ma | Country or state | Original ID and collection number |
|---|---|---|---|
| Middle Cambrian | India | P. ovale (114665) | |
| St Davids | Greenland | Phalagnostus ovalis (10478) | |
| Mayan | Russian Federation (Sakha) | P. crebra (225247) | |
| Mayan | Russian Federation | P. crebra (225248) | |
| Menevian | Sweden (Scania) | Phalagnostus ovalis (179691) | |
| Marjumian | USA (Utah) | P. rigbyi (230679) | |
| Wangcunian | China (Hunan) | P. dubium (49281 49282 128317) P. ovale (49163 49164 49165 49284 49285 49286 49288 49289 49290 128318 128319 128331 128332) P. ovale, P. dubium (49161 49162) P. ovale, P. dubium, P. scanense (49283) P. triangularis (128921 128922) | |
| Wangcunian | China (Henan) | Phalagnostus ovalis (127074) | |
| Wangcunian | China (Zhejiang) | P. dubium, P. triangularis (125538 125539) P. triangularis (125532) | |
| Wangcunian - Guzhangian | China (Zhejiang) | P. sp., P. dubium (125554) | |
| Zhanaarykian | Kazakhstan | P. ovale, P. dubium (9958 9961 9962 118097 118102) | |
| Boomerangian | Australia (Queenslandd) | P. sp. K, P. dubium (225252) | |
| Boomerangian | New Zealand (Nelson) | P. sp. (7897) | |
| Ayusokkanian | Kazakhstan | P. ovale, P. dubium (9950 118158) |