Howellella mongolica-Atrypa chulutensis Community, Dzhinsetu-Ula Range (Silurian of Mongolia)

Where: Mongolia (44.0° N, 98.0° E: paleocoordinates 35.4° N, 27.7° E)

• coordinate estimated from map

• basin-level geographic resolution

When: Tsagan-Bulakian Formation, Wenlock (433.4 - 427.4 Ma)

• Upper Wenlockian. Lower part of the Tsagan-Bulakian beds, Shara Chulutu sequence.

Environment/lithology: marine; gray, yellow, argillaceous limestone and gray limestone

• See lithology. BA3.
• "Occurs in yellowish-gray, argillaceous limestone, with interbeds of gray, fine-grained, compact, organogenic limestone, and partings of yellowish-gray calcaerous aleurolite (=siltstone) up to 2cm thick. The brachiopods occur as accumulations of articulated specimens...[suggestion] relatively quiet water."

Size class: macrofossils

Primary reference: K.H. S. Rozman. 1999. Silurian brachiopod communities of Mongolia. in A. J. Boucot and J. D. Lawson, eds., Paleocommunities - a case study from the Silurian and Lower Devonian 164-176 [M. Foote/C. Simpson]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 41066: authorized by Michael Foote, entered by Michael Foote on 06.07.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Emphasis of reference is on brachiopods. Other elements occasionally mentioned as well.
Strophomenata
 Strophomenida - Leptostrophiidae
"Tastaria gobica" = Protoleptostrophia
"Tastaria gobica" = Protoleptostrophia
 Strophomenida - Rafinesquinidae
"Leptaena depressa" = Leptaena (Leptaena) depressa
"Leptaena depressa" = Leptaena (Leptaena) depressa Sowerby 1824
Rhynchonellata
 Spiriferida - Hedeinopsidae
 Spiriferida - Delthyrididae
 Atrypida - Atrypidae
 Atrypida - Anazygidae
 Rhynchonellida - Rhynchotrematidae
 Orthida - Dalmanellidae
Anthozoa
 Auloporida - Syringoporidae
Syringopora gorsky tabulate coral
 Favositida - Alveolitidae
Subalveolites lunatus tabulate coral
 Heliolitida - Halysitidae
Halysites senior Klaamann 1961 tabulate coral
Halysites junior Klaamann 1961 tabulate coral