Alispira-Stegerhynchus Community, Dzhinsetu-Ula region (Silurian of Mongolia)

Where: Gobi Altai, Mongolia (45.4° N, 100.6° E)

• Paleocoordinates: 45.4° N, 48.4° W (Wright 2013)

• coordinate based on political unit

• local area-level geographic resolution

When: Llandovery (443.4 - 433.4 Ma)

• This community belongs to BA 2. The underlying community is the Glassia minuta Community, and the overlying community is the Atrypa-Tannuspirifer-Pentamerus Community.

• group of beds-level stratigraphic resolution

Environment/lithology: coastal; lithified limestone and lithified siltstone

• BA 2, shallowest subtidal range.
• Occurs in interbedded, reddish, brown, crinoidal, detrital limestones and siltstones. The valves are commonly disarticulated, unsorted, and from coquina which suggests considerable redeposition and accumulation near the shoreline.

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 13329: authorized by Michael Foote, entered by Carl Simpson on 25.02.2002

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Strophomenata
 Strophomenida - Rafinesquinidae
cf. Leptaena parvissima
cf. Leptaena parvissima Ivanovskii and Kulkov 1974
Rhynchonellata
 Rhynchonellida - Rhynchotrematidae
Stegerhynchus angaciensis, Stegerhynchus decemiplicata, Stegerhynchus concinnus
Stegerhynchus decemiplicata
S. decemiplicata duplex
 Rhynchonellida - Orthorhynchulidae
Tuvaerhynchus khalfini
 Atrypida - Atrypinidae
Alispira gracilis
 Spiriferida - Cyrtiidae
Eospirifer parvus
 Spiriferida - Delthyrididae
Howellella sp.
Howellella sp. Kozlowski 1946