Russel Branch, sample 2 (RB2), Waynesville Formation, St. Marys, IN: Ashgill, Indiana

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Lingulata - Lingulida - Pseudolingulidae
Pseudolingula sp. Mickwitz 1909
7 individuals
14 valves, mostly external molds and disarticulated
Craniata - Craniida - Craniidae
Philhedra laelia (Hall 1866)
1 individual
1 external mold
Tentaculitida - Tentaculitidae
Tentaculites sterlingensis
2 individuals
2 tubes
Stenolaemata - Trepostomata
Trepostomata indet. Ulrich 1882
1 individual
1 indeterminate bryozoan encrusting an indeterminate brachiopod valve
Stenolaemata - Trepostomata - Halloporidae
Halloporidae indet. Bassler 1911
1 %-area
Smooth, thick, branching bryozoan colonies, fragmented
Bivalvia - Myalinida - Ambonychiidae
Ambonychia sp. Hall 1847
Novack-Gottshall and Miller 2003 6 individuals
12 valves total, mostly articulated
Bivalvia - Ostreida - Pterineidae
Caritodens demissa (Conrad 1842)
Novack-Gottshall and Miller 2003 1 individual
recombined as Pterinea demissa
1 disarticulated valve
Bivalvia - Modiomorphida - Modiomorphidae
Modiolopsis modiolaris (Conrad 1838)
Novack-Gottshall and Miller 2003 16 individuals
31 valves total, from mostly articulated or associated specimens, some with carbonized periostracum and in life position
Cymatonota recta Ulrich 1893
Novack-Gottshall and Miller 2003 4 individuals
8 disarticulated valves, all external molds
Psiloconcha grandis Ulrich 1894
Novack-Gottshall and Miller 2003 1 individual
1 recrystallized valve
Pholadomorpha pholadiformis (Hall 1851)
Novack-Gottshall and Miller 2003 1 individual
1 external mold
Bivalvia - Actinodontida - Cycloconchidae
Cycloconcha milleri
Novack-Gottshall and Miller 2003 3 individuals
6 disarticulated valves, all external molds
Trilobita - Phacopida - Calymenidae
Calymenidae indet. Milne-Edwards 1840
2 individuals
2 cephala
Flexicalymene meeki (Foerste 1910)
16 individuals
16 pygidia, 8 articulated bodies (lacking cephala and pygidia), 8 cephala
Trilobita - Asaphida - Asaphidae
Isotelus gigas (Dekay 1824)
1 individual
recombined as Asaphus gigas
1 cephalon
Isotelus maximus Locke 1838
2 %-area
Fragmented trilobites, recrystallized; probably only 1 individual
see common names

Geography
Country:United States State/province:Indiana
Coordinates: 39.4° North, 85.1° West (view map)
Paleocoordinates:24.9° South, 59.1° West
Basis of coordinate:estimated from map
Geographic resolution:hand sample
Time
Period:Ordovician Epoch:Late/Upper Ordovician
10 m.y. bin:Ordovician 5
Key time interval:Ashgill
Age range of interval:449.60000 - 443.80000 m.y. ago
Stratigraphy
Formation:Waynesville
Stratigraphic resolution:bed
Stratigraphy comments: Middle Richmondian age. Sample #2 collected. Details on stratigraphy and sedimentation (lithology), and additional details of gastropod and bivalve fauna are included from Novack-Gottshall and Miller (2003) [PBDB reference #18186] and field notes.
Lithology and environment
Primary lithology:burrows,pyritic,shelly/skeletal lithified claystone
Secondary lithology:shelly/skeletal lithified wackestone
Includes fossils?Y
Lithology description: Massive, approximately 10-cm-thick, thick-bedded, massive claystone ("butter shales") with occasional pyritized burrows (Chondrites, subvertically-oriented with respect to the sediment layer). Claystones predominate section, with only 4 to 5, 1-cm-thick wackestone/packstone beds for every 50 cm of section.
Environment:offshore shelf Tectonic setting:cratonic basin
Geology comments: Sequence C5 (from Holland and Patzkowsky, 1996)
Taphonomy
Modes of preservation:body,cast,mold/impression,adpression,trace,recrystallized,original calcite,original chitin,replaced with calcite,replaced with pyrite
Size of fossils:macrofossils,mesofossils
Spatial orientation:life position
Preservation of anatomical detail:good
Abundance in sediment:common
Articulated whole bodies:many
Associated major elements:many
Disassociated major elements:some
Disassociated minor elements:some
Size sorting:very poor
Fragmentation:occasional
Temporal resolution:snapshot
Spatial resolution:autochthonous
Collection methods and comments
Collection methods:bulk,mechanical,field collection
Collection size:117 specimens
Rock censused:3326 g
Reason for describing collection:paleoecologic analysis
Collection method comments: Bulk collection made in field and weighed, cleaned, prepped, and identified in lab at University of Cincinnati. Sample weighed 3.326 Kg. 117 specimens counted; 62 individuals estimated (using half of total disarticulated specimens with two parts plus number of articulated/intact specimens). Trepostome bryozoans were counted as estimated percent cover using standard percent cover reference chart.
Taxonomic list comments:Representative samples (standards) of species used for taxonomic identification reference are stored at the University of Cincinnati. Many unidentifiable bivalves are not included in taxonomic list.
Metadata
Database number:64224
Authorizer:P. Novack-Gottshall Enterer:P. Novack-Gottshall
Modifier:P. Novack-Gottshall Research group:marine invertebrate
Created:2006-09-04 12:17:24 Last modified:2024-03-31 19:20:45
Access level:the public Released:2006-09-04 12:17:24
Creative Commons license:CC BY
Reference information

Primary reference:
18187. P. M. Novack-Gottshall. 1999. Comparative geographic and environmental diversity dynamics of gastropods and bivalves during the Ordovician Radiation (M.S. thesis, University of Cincinnati). 1-191 [P. Novack-Gottshall/P. Novack-Gottshall/P. Novack-Gottshall]

Secondary references:

18186 P. M. Novack-Gottshall and A.I. Miller. 2003. Taxonomic richness and abundance of Late Ordovician gastropods and bivalves in mollusc-rich strata of the Cincinnati Arch. Palaios 18:559-571 [P. Novack-Gottshall/P. Novack-Gottshall]