lower portion of Chichkanskaya Fm., Kazakhstan - Ogurtsova and Sergeev 1989 (Ediacaran of Kazakhstan)

Where: Kazakhstan (44.1° N, 68.2° E: paleocoordinates 24.7° N, 91.8° E)

• coordinate based on political unit

• outcrop-level geographic resolution

When: lower portion Member (Chichkanskaya Formation), Ediacaran (635.0 - 541.0 Ma)

• The Malokaroyskaya group is overlain with an erosional gap and a small angular unconformity, by the Lower CambrianTamdy Group, with faunally characterized deposits of the Nemakit-Daldyn horizon at the base of its section.

• group of beds-level stratigraphic resolution

Environment/lithology: basinal (); sandstone

• unknown type of basin
• siliceous facies (sandstone)

Size class: microfossils

Preservation: cast, concretion, replaced with silica, replaced with other

Collection methods: chemical, peel or thin section,

Primary reference: R. N. Ogurtsova and V. N. Sergeev. 1989. Megaspheromorphs from the Upper Precambrian Chichkanskaya Formation in southern Kazakhstan. Paleontological Journal 23(2):117-121 [M. Patzkowsky/P. Borkow]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 10693: authorized by Mark Patzkowsky, entered by Phil Borkow on 12.06.2001

Creative Commons license: CC BY (attribution)

Taxonomic list

• This is the first placement of the megaspheromorphs into several independent genera, including some problematical organisms known earlier as Churia Walcott, Obolella Chap., Protobolella Chap., Femoria Chap., and many others.
Show authors, comments, and common names
Chuaria globosa
  -
"Chuaria globosa n. sp." = Cerebrosphaera globosa
"Chuaria globosa n. sp." = Cerebrosphaera globosa Ogurtsova and Sergeev 1989
100 well preserved specimens from the type locality