PBDB Collection

L13 (Triassic to of Zambia)

Also known as Locality 15 of Drysdall and Kitching (1963)

Where: Eastern, Zambia (10.8° S, 33.2° E: paleocoordinates 51.0° S, 21.9° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: upper Member (Ntawere Formation), Anisian to Anisian (247.2 - 228.0 Ma)

• formation-level stratigraphic resolution

Environment/lithology: pond; lithified, nodular, red, calcareous mudstone

• The upper Ntawere succession is composed of dark red fissile mudstone with rhizocretions and laminar calcrete horizons, alternating with light-red massive siltstone interbedded with lenticular trough cross-bedded, coarse-grained siliceous sandstone, or gritstone. The new silesaurid was recovered from an outcrop of dark red fissile mudstone containing thin sheets of rough-surfaced calcareous nodular material, which has encrusted all of the bones. The interpreted depositional setting is a semipermanent standing water body in an arid floodplain setting. Associated fish, nonmarine bivalves (Unio karrooensis), and stromatolitic carbonates support the interpretation of a seasonal pond environment.

Size classes: macrofossils, mesofossils

Collected by B.R. Peecook, K. D. Angielczyk, C. A. Sidor in 2009, 2011, 2014; reposited in the UWBM

Collection methods: surface (float), mechanical,

Primary reference: B. R. Peecook, J. S. Steyer, N. J. Tabor and R. M. H. Smith. 2017. Updated Geology and Vertebrate Paleontology of the Triassic Ntawere Formation of Northeastern Zambia, with Special Emphasis on the Archosauromorphs. In C. A. Sidor, S. J. Nesbitt (eds.), Society of Vertebrate Paleontology Memoir 37(6 supp.):8-38 [C. Sidor/B. Peecook]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 151894: authorized by Chris Sidor, entered by Brandon Peecook on 15.10.2013, edited by Chris Sidor

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names

unclassified
-	Pytchoceratodontidae sp. Pytchoceratodontidae sp. NHCC LB65
Chondrichthyes
Heterodontiformes -	Hybodontoidei indet. Hybodontoidei indet. Owen 1846 bullhead shark NHCC LB496
Osteichthyes
Therapsida - Trirachodontidae	Cricodon metabolus² Cricodon metabolus² Crompton 1955 cynodont NHCC LB28, a mostly disarticulated and incomplete skeleton including cranial and mandibular elements as well as a scapula, distal humerus, parts of both radii and ulnae, both ilia, one ischium, parts of both femora and tibiae, and sev- eral vertebral elements
Reptilia
Pseudosuchia - Shuvosauridae	Shuvosauridae indet. Shuvosauridae indet. archosaur NHCC LB34
Loricata -	Loricata indet. Loricata indet. Merrem 1820 archosaur NHCC LB33
Dinosauromorpha - Silesauridae	Lutungutali sitwensis¹ Lutungutali sitwensis¹ Peecook et al. 2013 ornithodiran NHCC LB32, left and right ilia with attachment for two sacral ribs, incomplete left and right ischia, fragments of pubic shafts including articulated distal end of the pubes, parts of four anterior caudal vertebrae in articulation.
Amphibia
Temnospondyli -	cf. Stereospondyli indet. cf. Stereospondyli indet. von Zittel 1887 tetrapod NHCC LB678

¹Peecook et al. 2013; ²Sidor and Hopson 2018