Omingonde riverbed (Triassic to of Namibia)

Where: Otjozondjupa, Namibia (21.2° S, 16.5° E: paleocoordinates 50.3° S, 9.5° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Omingonde Formation, Ladinian to Ladinian (242.0 - 228.0 Ma)

• Tolchard et al. 2021: The holotype of Etjosuchus is stratigraphically positioned near the top of the upper Omingonde, approximately 40 m below the base of the overlying Etjo Formation (Fig. 2).

• group of beds-level stratigraphic resolution

Environment/lithology: "channel"; coarse-grained, pebbly sandstone

• Tolchard et al. 2021: interpreted to be the in-channel deposits of a sinuous ephemeral stream (Smith & Swart 2002).
• Tolchard et al. 2021: In the Etjo Mountain area, where the type specimen of Etjosuchus was found (Fig. 1), the Omingonde Formation is informally subdivided into a lower, maroon mudrock-dominated unit overlain by a series of multi- storied, white-weathering, pebbly sandstone bodies making up the middle unit, which is in turn overlain by an upper unit of red mudstone with interbedded gritstone and laterally accreted, fine-grained sandstone bodies (Holzf€orster et al. 1999). The holotype of Etjosuchus is stratigraphically positioned near the top of the upper Omingonde, approximately 40 m below the base of the overlying Etjo Formation (Fig. 2). It was preserved in a thin (1.5–3 m thick), ribbon-shaped (Friend 1983), trough cross-bedded, pebbly coarse-grained sandstone (Figs 2, 3)

Size class: macrofossils

Collection methods: mechanical

• Tolchard et al. 2021: At the Geological Survey of Namibia the top sides of each block were mechanically prepared with air-percussion scribes under magnifying lamps. GSN F382 is housed in the display gallery of the Geological Survey Museum of Namibia, Windhoek.

Primary reference: F. Tolchard, R. M. H. Smith, A. Arcuccid, H. Mockee, and J. N. Choinierea. 2021. A new ‘rauisuchian’ archosaur from the Middle Triassic Omingonde Formation (Karoo Supergroup) of Namibia. Journal of Systematic Palaeontology 19(8):595-631 [P. Mannion/G. Varnham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 224107: authorized by Philip Mannion, entered by Grace Varnham on 17.01.2022

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Reptilia
 Loricata -
Etjosuchus recurvidens n. sp.
Etjosuchus recurvidens n. sp. Tolchard et al. 2021 archosaur
Holotype: GSN F382 (partial skeleton)