Where: India (25.2° N, 90.7° E: paleocoordinates 15.9° N, 88.6° E)
• coordinate estimated from map
• local area-level geographic resolution
When: Baghmara Formation, Early/Lower Miocene (23.0 - 16.0 Ma)
• STRATIGRAPHIC RELATIONS: From Baghmara Formation, which regionally conformably overlies the Simsang Fm (presumanly Oligocene-Early Miocene) and is conformably overlain by the late Early MIocene Chengapara Fm. THICKNESS: Zone ranges from 2.08-2.3 m in thickness, within sections ranging from 15-20 m in thickness. AGE: Aquitanian-Burdigalian. STRATIGRAPHIC POSITION: From basal part of section, middle part of the Baghmara Fm.
• group of beds-level stratigraphic resolution
Environment/lithology: coastal; poorly lithified, gray, silty sandstone and lithified, red limestone
Size class: macrofossils
Collection methods: surface (in situ),
• COLLECTORS: Presumably the authors, B. C. Lyngdoh, R. P. Tiwari, and R. P. Kachhara. REPOSITORY: Paleontology Museum of the Department of Geology, Pachunga University College, North-Eastern Hill University, Mizoram, India.
Primary reference: B. C. Lyngdoh, R. P. Tiwari, and R. P. Kachhara. 1999. Miocene Molluscan biosratigraphy of the Garo Hills, Meghalaya, India. Journal of the Paleontological Society of India 44:55-67 [A. Hendy/A. Hendy]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 72083: authorized by Austin Hendy, entered by Austin Hendy on 24.05.2007
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Bivalvia | |
Gryphaeostrea sp. Conrad 1865 oyster | |
Ostrea latimarginata, "Ostrea angulata" = Crassostrea angulata
Ostrea latimarginata Vredenburg 1908 oyster
"Ostrea angulata" = Crassostrea angulata Sowerby 1840 oyster | |
"Chlamys senatoria" = Mimachlamys senatoria, Pecten (Amusiopecten) sp., "Chlamys (Argopecten) "n. sp."" = Argopecten
"Chlamys senatoria" = Mimachlamys senatoria Gmelin 1791 scallop
Pecten (Amusiopecten) sp. Müller 1776 scallop
"Chlamys (Argopecten) "n. sp."" = Argopecten Monterosato 1889 calico scallop | |
Anadara sp., Anadara multiformis, Anadara submultiformis, Trisidos "n. sp.", Trisidos prototortuosum, Trisidos semitorta
| |
"Arcopsis bataviana" = Arcopsis (Arcopsis) bataviana
"Arcopsis bataviana" = Arcopsis (Arcopsis) bataviana Martin 1883 clam SUBSPECIES: A. bataviana carinata
| |
"Cardita mutabilis" = Venericardia (Glyptoactis) mutabilis
"Cardita mutabilis" = Venericardia (Glyptoactis) mutabilis d'Archaic and Haime 1954 clam | |
Astarte sp. Sowerby 1816 clam | |
Crassatella sp. Lamarck 1799 clam
Eucrassatella (Hypholobus) rostrata Lamarck 1805 clam | |
Thracia sp. Blainville 1824 clam | |
Cerastoderma sp., Acrosterigma (Vasticardium) njalindungense, Trachycardium minbuense, Trachycardium aff. minbuense, Trachycardium protosubrugosum, "Vepricardium (Hedecardium) sp." = Hedecardium, Clinocardium sp., Fragum thetregyinense
Cerastoderma sp. Mörch 1853 cockle
Trachycardium minbuense Noetling 1901 cockle
Trachycardium aff. minbuense Noetling 1901 cockle
Trachycardium protosubrugosum Noetling 1901 cockle
"Vepricardium (Hedecardium) sp." = Hedecardium Marwick 1944 cockle
Clinocardium sp. Keen 1936 cockle
Fragum thetregyinense cockle | |
Tellina cf. rostrata, Tellina (Quidnipagus) sp., Tellina (Tellinella) pseudohilli, Tellina (Tellinella) hilli, Tellina (Eurytellina) sp.
Tellina cf. rostrata tellin clam
Tellina (Quidnipagus) sp. Linnaeus 1758 tellin clam
Tellina (Tellinella) pseudohilli tellin clam
Tellina (Tellinella) hilli tellin clam
Tellina (Eurytellina) sp. Fischer 1887 tellin clam | |
Donax (Hecuba) sp. Schumacher 1817 clam | |
Gari (Gari) natensis clam | |
Lutraria saingengai clam
Mactra (Allomactra) sp. Linnaeus 1767 clam
Mactra (Allomactra) grateloupi Cossmann and Peyrot 1909 clam | |
Dosinia exolerata, Dosinia (Phacosoma) protojuvenilis, "Dosinia subpenicillata" = Dosina subpenicillata, Bassina sp., Amiantis sp., "Callista (Costacallista) erycina" = Costacallista erycina
Dosinia exolerata venus clam
Dosinia (Phacosoma) protojuvenilis Noetling 1901 venus clam
"Dosinia subpenicillata" = Dosina subpenicillata Vredenburg 1928 venus clam
Bassina sp. Jukes-Brown 1914 venus clam
Amiantis sp. Carpenter 1863 venus clam
"Callista (Costacallista) erycina" = Costacallista erycina Linnaeaus 1758 venus clam | |
Diplodonta incerta d'Archiac 1850 clam | |
"Corbula harpa" = Corbula (Bicorbula) harpa, Corbula sp., Corbula (Corbula) tunicosulcata, Corbula (Varicorbula) sulcata
"Corbula harpa" = Corbula (Bicorbula) harpa Archaic and Haime 1854 clam
Corbula sp. Bruguière 1789 clam
Corbula (Corbula) tunicosulcata Vredenburg 1928 clam
Corbula (Varicorbula) sulcata Lamarck 1801 clam | |
Milthona sp. Marwick 1931 clam | |
Gastropoda | |
"Architectonica affine" = Architectonica affinis
"Architectonica affine" = Architectonica affinis Sowerby 1840 sundial [entered as Architectonica affinis]
| |
Calyptraea chinensis Linnaeus 1758 slipper shell | |
Strombus sp. Linnaeus 1758 conch | |
"Rimella subrimosa" = Varicospira subrimosa
| |
Ficus retciulata fig shell | |
Volutospina jacobsi Vredenburg 1921 volute
Volutospina mekranica Vredenburg 1925 volute | |
Cancellaria inornata snail | |
| |
Conus (Leptoconus) viminens cone shell
Conus (Leptoconus) tomlini Dey 1961 cone shell | |
Strioterebrum mukerjeei Dey 1961 auger snail
Terebra coxi Dey 1961 auger snail
Terebra gedrosiana Vredenburg 1925 auger snail | |
"Turris (Gemmula) congener" = Gemmula congener
"Turris (Gemmula) congener" = Gemmula congener Smith 1894 turrid SUBSPECIES: T. (G.) congener mekranica
| |
Babylonia pangakensis true whelk
Babylonia zeylonia true whelk | |
Fusinus reticulatus snail | |
Volvaria kayalensis mitre shell | |
Semicassis sp. Mörch 1852 snail
Semicassis mekranica Vredenburg 1925 snail
Galeodea dubia snail
Cypraecassis sp. Stuchburry 1837 snail | |
Natica sp., Natica "sp. B", Natica obscura, Sinum protoneritoides, Sinum aquensis, "Natica didyma" = Glossaulax didyma, "Natica tigrina" = Cochlis tigrina
Natica sp. Scopoli 1777 moon snail
Natica "sp. B" Scopoli 1777 moon snail
Natica obscura Sowerby 1840 moon snail
Sinum protoneritoides moon snail
"Natica didyma" = Glossaulax didyma Röding 1798 moon snail
"Natica tigrina" = Cochlis tigrina Röding 1798 moon snail | |
"Drillia (Crassispira) cotteri" = Inquisitor cotteri
"Drillia (Crassispira) cotteri" = Inquisitor cotteri Vredenburg 1921 snail | |
Protoma subrenevieri, Turritella pseudobangongensis, Turritella kalayensis, Turritella horrisoni, Turritella cf. rostrata, Turritella sp., Turritella affinis, Turritella narica, Turritella noetlingi, Turritella (Turritella) terebra
Protoma subrenevieri Vredenburg 1928 turret shell
Turritella pseudobangongensis turret shell
Turritella kalayensis turret shell
Turritella horrisoni turret shell
Turritella cf. rostrata turret shell
Turritella sp. Lamarck 1799 turret shell
Turritella affinis Muller 1849 turret shell
Turritella noetlingi Vredenburg 1921 turret shell | |
"Cerithium (Ptychocerithium) perlamellosum" = Ptychocerithium perlamellosum, Bittium quilonense
"Cerithium (Ptychocerithium) perlamellosum" = Ptychocerithium perlamellosum Vredenburg 1928 cerith snail
Bittium quilonense Dey 1961 cerith snail | |
"Pleurotomaria" sp. Defrance 1826 snail |