Anzhar River, Chu-Ili Range, bioherms (Ordovician of Kazakhstan)

Also known as Reef 2502

Where: Kazakhstan (43.8° N, 74.6° E: paleocoordinates 15.4° S, 75.8° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Paraorthograptus pacificus graptolite zone, Ulkuntas Member (Chokpar Formation), Katian (453.0 - 445.2 Ma)

• PJW: Was listed as Hirnantian, but this is Ka4.

• group of beds-level stratigraphic resolution

Environment/lithology: reef, buildup or bioherm; lithified limestone

• biohermal limestones

Size class: macrofossils

Primary reference: M. K. Apollonov, T. N. Koren, I. F. Nikitin, L. M. Paletz, and D. T. Tzai. 1988. Nature of the Ordovician-Silurian boundary in south Kazakhstan, USSR. Bulletin of the British Museum (Natural History), Geology 43:145-154 [W. Kiessling/U. Merkel]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 80656: authorized by Wolfgang Kiessling, entered by Uta Merkel on 02.05.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Holotrachellus punctillosus, Amphylicas sp.
Anthozoa
 Heliolitida - Halysitidae
Catenipora inordinata
Catenipora inordinata tabulate coral
 Heliolitida - Plasmoporellidae
Plasmoporella papillatiformis
 Heliolitida - Proporidae
Propora cancellatiformis
 Heliolitida - Heliolitidae
Heliolites parvulus
Heliolites parvulus tabulate coral
 Favositida - Agetolitidae
Agetolites cf. mirabilis, Hemiagetolites insignis
Hemiagetolites insignis tabulate coral
Rhynchonellata
 Pentamerida - Virgianidae
? Tcherskidium ulkuntasense, Holorhynchus giganteus, Proconchidium tchuilensis
? Tcherskidium ulkuntasense Rukavishnikova and Sapelnikov 1973
Proconchidium tchuilensis Rukavishnikova and Sapelnikov 1973
Trilobita
 Phacopida - Cheiruridae
Sphaerexochus sp.
Sphaerexochus sp. Beyrich 1845 trilobite