Bekoratsaka River (Cretaceous of Madagascar)

Where: Madagascar (16.5° S, 45.8° E: paleocoordinates 40.2° S, 31.2° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Albian (113.0 - 100.5 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified marl and lithified, argillaceous limestone

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 98268: authorized by Wolfgang Kiessling, entered by Uta Merkel on 29.09.2010

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
unclassified
  -
Kingenia asperulina, Kingenia shanalurensis
Echinoidea
 Euechinoidea - Pseudodiadematidae
Tetragramma aff. brongniarti
Malacostraca
 Decapoda - Nephropidae
Hoploparia collignoni
Hoploparia collignoni Van Stralen 1949 clawed lobster
Rhynchonellata
 Rhynchonellida - Rhynchonellidae
Rhynchonella sulcata
 Terebratulida - Gibbithyrididae
"Terebratula obesa" = Concinnithyris obesa
"Terebratula obesa" = Concinnithyris obesa Sowerby 1823
 Terebratulida - Terebratulidae
Terebratula subrotunda
 Terebratulida - Sellithyrididae
"Terebratula sella" = Sellithyris sella, "Terebratula dutempleana" = Moutonithyris dutempleana
"Terebratula sella" = Sellithyris sella Sowerby 1823
"Terebratula dutempleana" = Moutonithyris dutempleana d'Orbigny 1851
Gastropoda
 Pleurotomarioidea - Pleurotomariidae
Leptomaria alpina
Bivalvia
 Mytilida - Mytilidae
"Modiola recta" = Modiolatus rectus
"Modiola recta" = Modiolatus rectus Conrad 1837 mussel
 Ostreida - Ostreidae
Ostrea milleti
 Ostreida - Gryphaeidae
"Ostrea besairiei" = Gyrostrea besairiei, Exogyra conica
"Ostrea besairiei" = Gyrostrea besairiei Collignon 1949 oyster
Exogyra conica Sowerby 1813 oyster
 Pectinida - Pectinoidae
"Janira quinquecostata" = Pecten (Janira)
"Janira quinquecostata" = Pecten (Janira) scallop
 Hiatellida - Hiatellidae
Panopea triangula, Panopea submandibula
Cephalopoda
 Ammonitida - Desmoceratidae
"Beudanticeras hourcqi" = Roberticeras hourcqi, "Lunatodorsella chirichensis" = Desmoceras, "Desmoceras latidorsatum" = Desmoceras (Desmoceras) latidorsatum
"Beudanticeras hourcqi" = Roberticeras hourcqi Collignon 1949 ammonite
"Lunatodorsella chirichensis" = Desmoceras ammonite
"Desmoceras latidorsatum" = Desmoceras (Desmoceras) latidorsatum Michelin 1838 ammonite
 Ammonitida - Beudanticeratidae
Beudanticeras ambanjabense
 Ammonitida - Lytoceratidae
Ammonoceratites aff. mahadeva
 Ammonitida - Douvilleiceratidae
Douvilleiceras inaequinodum, "Douvilleiceras mamillatum" = Douvilleiceras mammillatum
Douvilleiceras inaequinodum Quenstedt 1849 ammonite
"Douvilleiceras mamillatum" = Douvilleiceras mammillatum Schlotheim 1813 ammonite
 Ammonitida - Hamitidae
Hamites aff. maximus
Hamites aff. maximus Sowerby 1814 ammonite
 Ammonitida - Anisoceratidae
Protanisoceras flexuosum, Metahamites dubius
 Phylloceratida - Phylloceratidae
"Phylloceras velledae" = Phylloceras (Hypophylloceras) velledae
"Phylloceras velledae" = Phylloceras (Hypophylloceras) velledae Michelin 1834 ammonite
 Nautilida - Nautilidae
Cymatoceras sakalavum
Cymatoceras sakalavum Collignon 1949 nautiloid
 Belemnitida - Belemnitidae
"Hibolites minimus" = Belemnites (Hibolites)
"Hibolites minimus" = Belemnites (Hibolites) belemnite