Additional Tra-Tra Formation Echinoderms, South Africa (Devonian of South Africa)

Where: South Africa (33.0° S, 20.0° E: paleocoordinates 65.2° S, 155.1° W)

• coordinate estimated from map

• basin-level geographic resolution

When: Tra-Tra Formation, Eifelian (393.3 - 387.7 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; bioturbated, intraclastic siltstone and bioturbated, intraclastic, silty mudstone

• Ref. 9618 gives interpretation of Bokkeveld Group as a series of shallowing-upward packages, with argillaceous unit below and arenaceous unit above. Tra-Tra Formation is the "third shale", i.e. the third argillaceous unit. The shallowing upward sequence is interpreted as representing environments from the shelf up to deltaic systems. Most fossils come from lower mudstones, often in lenses.
• Ref. 9617, for formation as a whole, cites "Siltstone and silty mudstone and minor thin-bedded, sandstone, ripple and micro cross laminated, abundant ripple marks, bioturbation and trace fossils, thin intraclast lenses, plant fragments"

Collection methods: Included are occurrences that cannot obviously be assigned to one of the localities of ref. 9616.

Primary reference: P. A. Jell and J. N. Theron. 1999. Early Devonian echinoderms from South Africa. Memoirs of the Queensland Museum 43(1):115-199 [M. Foote/M. Foote/M. Foote]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 39147: authorized by Michael Foote, entered by Michael Foote on 21.05.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

• Echinoderms only.
  - Encrinasteridae
Encrinaster tischbeinianus Roemer 1864 brittle star