Ambilobe Bay (nodule beds) (Triassic of Madagascar)

Where: Diana, Madagascar (13.1° S, 48.9° E: paleocoordinates 44.7° S, 41.0° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Middle Sakamena Formation (Sakamena Group), Dienerian (252.2 - 251.3 Ma)

• Middle Sakamena Group "Bed 5"

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, concretionary siliciclastic sediments

Size class: macrofossils

Preservation: concretion, replaced with calcite

Collected by B. Kummel in 1961; reposited in the MCZ

Collection methods: surface (in situ),

Primary reference: K. S. Thomson. 1982. An Early Triassic hybodont shark from northern Madagascar. Postilla 186:1-16 [M. Clapham/P. Vazquez/M. Carrano]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 117105: authorized by Matthew Clapham, entered by Matthew Clapham on 15.09.2011, edited by Priscilla Vazquez

Creative Commons license: CC BY (attribution)

Taxonomic list

 Hybodontiformes - Acrodontidae
? Acrodus sp. Agassiz 1838 elasmobranch
MCZ 13432
 Parasemionotiformes - Parasemionotidae