Persimedusites chahgazensis

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Persimedusites chahgazensis
41598 2018 23442 Fig2 HTML Persimedusites.png
P. chahgazensis fossil
Persimedusites chahgazensis pennetta.png
Artist's restoration
Scientific classification
Kingdom:
Animalia
Phylum:
Cnidaria
Class:
Cyclozoa
Genus:
†Persimedusites

Hahn et Pflug, 1980
Species:
†P. chahgazensis
Binomial name
†Persimedusites chahgazensis
Hahn et Pflug, 1980

Persimedusites chahgazensis is a Precambrian discoidal species which are believed to have existed primarily during the late Ediacaran period. [1] It was discovered initially in the Kushk Series in the Bafq and Behabad regions of central Iran, along with similarly aged specimen of Cloudina and Corumbella . [2] [3] The body fossils of these disc-shaped organisms are approximately one centimeter in diameter, and were noted to have symmetrical internal lobes, as well as secondary distal branches. [4]

Contents

Description

These preserved branching structures have a noted resemblance to tentacles, and have been observed to be similar to the oral view of Eolympia pediculata . [5] Similar fossils from the late Neoproterozoic Cerro Negro Formation in Argentina have been suggested to resemble Aspidella , but the Iranian specimens lack the customary holdfasts. An important feature of Perimedusites lacked by many similarly disc-shaped late Ediacaran fossils is the radial branches that extend from their center, creating a repetitive structure. Rugoconites enigmaticus, however, does manifest a similar structure, making it possibly comparable [4]

As a member of the phylum Cnidaria, Persimedusites has been hypothesized to resemble a modern jellyfish due to their four-fold radial symmetry., [6] but the true form of these fossils cannot yet be interpreted unequivocally [4]

See also

References

  1. ↑ "Figure 2. Ediacaran fossils from the Kushk Series, Kushk and Chahmir..." ResearchGate. Retrieved 2020-01-01.
  2. ↑ Vaziri, Seyed Hamid; Laflamme, Marc (2018-08-08). "Lithostratigraphy and sedimentary environment of the Precambrian Kushk Series of central Iran". Canadian Journal of Earth Sciences. 55 (11): 1284–1296. Bibcode:2018CaJES..55.1284V. doi:10.1139/cjes-2017-0234. hdl: 1807/90152 . ISSN   0008-4077.
  3. ↑ Vaziri, Seyed Hamid; Majidifard, Mahmoud Reza; Laflamme, Marc (2018-03-22). "Diverse Assemblage of Ediacaran fossils from Central Iran". Scientific Reports. 8 (1): 5060. Bibcode:2018NatSR...8.5060V. doi:10.1038/s41598-018-23442-y. ISSN   2045-2322. PMC   5864923 . PMID   29567986.
  4. 1 2 3 Vickers-Rich, Patricia; Soleimani, Sara; Farjandi, Farnoosh; Zand, Mehdi; Linnemann, Ulf; Hofmann, Mandy; Wilson, Siobhan A.; Cas, Raymond; Rich, Thomas H. (2018-04-03). "A preliminary report on new Ediacaran fossils from Iran". Alcheringa: An Australasian Journal of Palaeontology. 42 (2): 230–243. doi:10.1080/03115518.2017.1384061. ISSN   0311-5518. S2CID   135162662.
  5. ↑ Han, Jian; Kubota, Shin; Uchida, Hiro-omi; Jr, George D. Stanley; Yao, Xiaoyong; Shu, Degan; Li, Yong; Yasui, Kinya (2010-10-13). "Tiny Sea Anemone from the Lower Cambrian of China". PLOS ONE. 5 (10): e13276. Bibcode:2010PLoSO...513276H. doi: 10.1371/journal.pone.0013276 . ISSN   1932-6203. PMC   2954142 . PMID   20967244.
  6. ↑ De, Chirananda (2006-09-15). "Ediacara fossil assemblage in the upper Vindhyans of Central India and its significance". Journal of Asian Earth Sciences. 27 (5): 660–683. Bibcode:2006JAESc..27..660D. doi:10.1016/j.jseaes.2005.06.006. ISSN   1367-9120.
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