Gypidula eopelagica Community, Mongolian Altai (Silurian of Mongolia)

Where: Mongolia (47.0° N, 93.0° E: paleocoordinates 35.5° N, 16.3° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Chokusin Formation, Wenlock (433.4 - 427.4 Ma)

• Lower Wenlock. Lowermost parts of the Chokusin layers, Kyzyl-Dzhar-Chokusu sequence.

• member-level stratigraphic resolution

Environment/lithology: marine; siltstone and shelly/skeletal limestone

• See lithology.
• "occurs in an interbedded sequence of siltstone, limestone, and gray, fine-grained organogenic, coralliferous limestone. Gypidula occurs as accumulations of articulated specimens of all sizes in life position on their argillaceous bedding substrate...relatively quiet water...whereas interbedded layers with stromatoporoids and corals correspond to more turbulent conditions...coastal zone...BA3"

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 41063: 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.
Show authors, comments, and common names
Rhynchonellata
 Pentamerida - Gypidulidae
Gypidula eopelagica
 Pentamerida - Pentameridae
Pentamerus magianicus
 Spiriferida - Hedeinopsidae
Tannuspirifer variabilis
 Athyridida - Meristellidae
Pseudomeristina sp.
 Atrypida - Atrypidae
Atrypa orientalis
 Rhynchonellida - Rhynchotrematidae
Stegerhynchus angaciensis
Anthozoa
 Rugosa -
Rugosa indet.
Rugosa indet. horn coral
 Favositida - Favositidae
Favosites ex gr. jaaniensis
Favosites ex gr. jaaniensis Sokolov 1952 tabulate coral
 Auloporida - Syringoporidae
Syringopora khalagensis, Syringopora gorsky, Syringopora novella
Syringopora gorsky tabulate coral
Syringopora novella tabulate coral
 Heliolitida - Halysitidae
Halysites senior
Halysites senior Klaamann 1961 tabulate coral
Stromatoporoidea
 Stromatoporoidea -
Stromatoporoidea indet.
Stromatoporoidea indet. stromatoporoid sponge