East of Ankirihitra (Jurassic of Madagascar)

Also known as Collignon gisement 19

Where: Madagascar (16.7° S, 46.5° E: paleocoordinates 25.6° S, 24.0° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Properisphinctes bernensis et Trimarginites villersensis ammonoid zone, Early/Lower Oxfordian (161.2 - 155.7 Ma)

• Trimarginites villersensis and Properisphinctes bernensis zone

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified marl and lithified limestone

Size class: macrofossils

Collected by M. Collignon in 1953

Primary reference: M. Collignon. 1959. Atlas des fossiles caractéristiques de Madagascar (Ammonites). Fascicule III (Oxfordian). Pl. XXXIV-XLVI [P. Scofield/P. Scofield]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 234136: authorized by Paul Scofield, entered by Paul Scofield on 20.03.2024

Creative Commons license: CC BY (attribution)

Taxonomic list

Cephalopoda
 Ammonitida - Aspidoceratidae
Peltoceras trifidum horrida ammonite
UBGD.010192, UBGD.010193
 Ammonitida - Perisphinctidae
"Prososphinctes bernensis" = Properisphinctes bernensis de Loriol 1898 ammonite
UBGD.010180-86
Prososphinctes claromontanus Bukowski 1887 ammonite
UBGD.010176, UBGD.010177
"Prososphinctes mazuricus n. sp." = Prososphinctes consociatus Bukowski 1887 ammonite
UBGD.010174, UBGD.010175
Prososphinctes trapezoidalis Haas 1955 ammonite
UBGD.010178, UBGD.010179
Obtusicostites aff. devi Spath 1931 ammonite
juv.
Obtusicostites retrorsicostatus n. sp. Collignon 1959 ammonite
UBGD.010171, UBGD.010172
 Ammonitida - Oppeliidae
Taramelliceras minax iabohazensis n. ssp. Collignon 1959 ammonite
UBGD.010170
Campylites delmontanus ambongoensis n. ssp. Collignon 1959 ammonite
UBGD.010166, UBGD.010167
Trimarginites villersensis ankirihitraensis n. ssp. Collignon 1959 ammonite
UBGD.010164, UBGD.010165
Brightia noizeti n. sp. Collignon 1959 ammonite
UBGD.010168, UBGD.010169
 Phylloceratida - Phylloceratidae
Phylloceras duodecimsulcatum n. sp. Collignon 1959 ammonite
UBGD.010162, UBGD.010163