Mahatsinjo (Jurassic of Madagascar)

Where: Madagascar (16.8° S, 46.0° E: paleocoordinates 24.1° S, 23.8° E)

• coordinate based on nearby landmark

• small collection-level geographic resolution

When: Early/Lower Callovian (164.7 - 161.2 Ma)

• unit 1, 10 m thick

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified marl and lithified limestone

• grey marls with limestone banks

Size class: macrofossils

Primary reference: H. Besairie and M. Collignon. 1972. Geologie de Madagascar I. Les Terrains Sedimentaires. Annales Geologiques de Madagascar 35:1-463 [A. Rees/A. Rees]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 98153: authorized by Wolfgang Kiessling, entered by Uta Merkel on 22.09.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Cephalopoda
 Ammonitida - Lytoceratidae
"Thysanolytoceras adeloides" = Lytoceras eudesianum adeloides
"Thysanolytoceras adeloides" = Lytoceras eudesianum adeloides Kudernatsch 1852 ammonite
 Ammonitida - Macrocephalitidae
Macrocephalites chariensis, Nothocephalites semilaevis, Nothocephalites mondegoensis
 Ammonitida - Perisphinctidae
Indosphinctes cf. peregrinus, "Grossouvria cf. rjasanensis" = Choffatia, "Grossouvria cf. bucharica" = Choffatia, Grossouvria crassa, Choffatia cf. baluchistanensis
Indosphinctes cf. peregrinus Spath 1931 ammonite
"Grossouvria cf. rjasanensis" = Choffatia ammonite
"Grossouvria cf. bucharica" = Choffatia ammonite
Grossouvria crassa Siemiradzki 1894 ammonite
Choffatia cf. baluchistanensis Noetling 1896 ammonite
 Phylloceratida - Phylloceratidae
Ptychophylloceras flabellatum
Ptychophylloceras flabellatum Neumayr 1871 ammonite
Bivalvia
 Ostreida - Palaeolophidae
"Alectryonia gregarea" = Actinostreon gregareum, "Lopha marshii" = Actinostreon marshi
"Alectryonia gregarea" = Actinostreon gregareum Sowerby 1816 oyster
"Lopha marshii" = Actinostreon marshi Sowerby 1814 oyster
 Arcida - Parallelodontidae
Grammatodon jurianus
 Pholadida - Ceratomyidae
"Ceromya sarthacensis" = Ceratomya
"Ceromya sarthacensis" = Ceratomya clam
Rhynchonellata
 Rhynchonellida - Cyclothyrididae
"Rhynchonella pseudoinconstans" = Torquirhynchia pseudoinconstans
"Rhynchonella pseudoinconstans" = Torquirhynchia pseudoinconstans Kitchin 1900