Poamay, M-21 (Triassic to of Madagascar)

Where: Toliara, Madagascar (20.3° S, 45.4° E: paleocoordinates 23.1° S, 24.7° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Upper Member (Isalo II Formation), Norian to Norian (228.0 - 174.7 Ma)

• "within the uppermost Malagasy Karoo (upper Isalo II), immediately below the Andafia Limestone, and below overlying post-Karoo strata". Age of locality is very poorly constrained - biostratigraphic evidence suggests either Late Triassic (Norian) or Early Jurassic

• member-level stratigraphic resolution

Environment/lithology: channel lag; conglomerate and white sandstone

• "poorly sorted, pebble to cobble conglomerate"

Size class: macrofossils

Collected in 1997; reposited in the FMNH

Collection methods: surface (in situ), mechanical,

Primary reference: K. C. Burmeister, J. J. Flynn, J. M. Parrish and A. R. Wyss. 2006. Paleogeographic and biostratigraphic implications of new early Mesozoic vertebrates from Poamay central Morondava Basin, Madagascar. In J. D. Harris, S. G. Lucas, J. A. Spielmann, M. G. Lockley, A. R. C. Milner, J. I. Kirkland (eds.), The Triassic-Jurassic Terrestrial Transition. New Mexico Museum of Natural History and Science Bulletin 37:457-475 [R. Butler/R. Butler/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 96323: authorized by Richard Butler, entered by Richard Butler on 01.06.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Osteichthyes
 Synapsida -
? Synapsida indet. synapsid
Tooth
Reptilia
 Diapsida -
Archosauromorpha indet. Huene 1946 archosauromorph
Osteoderm fragments
 Archosauria -
Archosauria indet. Cope 1869 archosaur
20 tooth fragments, coracoid, 18 osteoderm fragments
 Theropoda -
? Theropoda indet. Marsh 1881 theropod
Tooth
 Phytosauria - Parasuchidae
"? Phytosauridae indet." = Mystriosuchinae
"? Phytosauridae indet." = Mystriosuchinae von Huene 1915 archosaur
Tooth fragments
Actinopteri
 Semionotiformes - Semionotidae
Semionotidae indet. Woodward 1890
Scales
 Perleidiformes - Colobodontidae
Colobodontidae indet. Stensiƶ 1916
Tooth plates
Chondrichthyes
 Hybodontiformes - Acrodontidae
Asteracanthus sp. Agassiz 1836 elasmobranch
Teeth