Baghmara Fm - Zone IA: Early/Lower Miocene, India

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Sinym cymba
Gastropoda - Cerithiidae
Bittium quilonense Dey 1961
Cerithium (Ptychocerithium) perlamellosum Vredenburg 1928
recombined as Ptychocerithium perlamellosum
Gastropoda - Turritellidae
Turritella cf. rostrata
Turritella horrisoni
Turritella kalayensis
Turritella pseudobangongensis
Turritella sp. Lamarck 1799
Turritella narica Vredenburg 1928
SUBSPECIES: T. narica baluchistanensis
Turritella affinis Muller 1849
Turritella (Turritella) terebra (Linnaeus 1758)
SUBSPECIES: T. (T.) terebra bantamensis
Turritella noetlingi Vredenburg 1921
Protoma subrenevieri Vredenburg 1928
Gastropoda - Naticidae
Sinum protoneritoides
Sinum aquensis (Recluz 1843)
SUBSPECIES: S. aquensis praecedens
Natica didyma (Röding 1798)
recombined as Glossaulax didyma
Natica tigrina (Röding 1798)
recombined as Cochlis tigrina
Natica informal sp. B Scopoli 1777
Natica sp. Scopoli 1777
Natica sp. Scopoli 1777
Natica obscura Sowerby 1840
Gastropoda - Rostellariidae
Rimella subrimosa (d'Orbigny 1852)
recombined as Varicospira subrimosa
SUBSPECIES: R. subrimosa narica
Gastropoda - Strombidae
Strombus sp. Linnaeus 1758
Gastropoda - Ficidae
Ficus retciulata
Ficus pamotanensis (Martin 1899)
SUBSPECIES: F. pamotanensis kachchhensis
Gastropoda - Cassidae
Cypraecassis sp. Stuchburry 1837
Galeodea dubia
Semicassis sp. Mörch 1852
Semicassis mekranica Vredenburg 1925
Gastropoda - Neogastropoda - Volutidae
Volutospina mekranica Vredenburg 1925
Volutospina jacobsi Vredenburg 1921
Gastropoda - Neogastropoda - Olivellidae
Olivancillaria (Agaronica) nebulosa (Lamarck 1822)
SUBSPECIES: O. (A.) nebulosa pupa
    = Agaronia pupa Sowerby 1840
Harzhauser et al. 2009
Gastropoda - Neogastropoda - Terebridae
Terebra coxi Dey 1961
Terebra gedrosiana Vredenburg 1925
Strioterebrum mukerjeei Dey 1961
Gastropoda - Neogastropoda - Turridae
Turris (Gemmula) congener (Smith 1894)
recombined as Gemmula congener
SUBSPECIES: T. (G.) congener mekranica
Gastropoda - Neogastropoda - Conidae
Conus (Leptoconus) viminens
Conus (Leptoconus) tomlini Dey 1961
Gastropoda - Neogastropoda - Fasciolariidae
Fusinus reticulatus
Gastropoda - Neogastropoda - Buccinidae
Babylonia zeylonia
Babylonia pangakensis
Gastropoda - Neogastropoda - Mitridae
Volvaria kayalensis
Gastropoda - Neogastropoda - Cancellariidae
Cancellaria inornata
Gastropoda - Neotaenioglossa - Calyptraeidae
Calyptraea chinensis (Linnaeus 1758)
Gastropoda - Pseudomelaniidae
Drillia (Crassispira) cotteri Vredenburg 1921
recombined as Inquisitor cotteri
Gastropoda - Heterostropha - Architectonicidae
Architectonica affine (Sowerby 1840)
recombined as Architectonica affinis
[entered as Architectonica affinis]
Gastropoda - Pleurotomariidae
"Pleurotomaria" sp. Defrance 1826
Bivalvia - Carditida - Crassatellidae
Crassatella sp. Lamarck 1799
Eucrassatella (Hypholobus) rostrata (Lamarck 1805)
Eucrassatella (Hybolophus) rostrata (Lamarck 1805)
SUBSPECIES: E. (H.) rostrata
Bivalvia - Carditida - Astartidae
Astarte sp. Sowerby 1816
Astarte (Digitariopsis) grateloupi
Astarte (Ashtarotha) trigonoequilaterata
Bivalvia - Carditida - Carditidae
Cardita mutabilis d'Archaic and Haime 1954
recombined as Venericardia (Glyptoactis) mutabilis
Bivalvia - Thraciida - Thraciidae
Thracia sp. Blainville 1824
Bivalvia - Cardiida - Ungulinidae
Diplodonta incerta d'Archiac 1850
Bivalvia - Cardiida - Mactridae
Lutraria saingengai
Mactra (Allomactra) sp. Linnaeus 1767
Mactra (Allomactra) grateloupi Cossmann and Peyrot 1909
Bivalvia - Cardiida - Veneridae
Amiantis sp. Carpenter 1863
Callista (Costacallista) erycina (Linnaeaus 1758)
recombined as Costacallista erycina
Bassina sp. Jukes-Brown 1914
Dosinia exolerata
Dosinia (Phacosoma) protojuvenilis Noetling 1901
Dosinia subpenicillata Vredenburg 1928
recombined as Dosina subpenicillata
Bivalvia - Cardiida - Tellinidae
Tellina cf. rostrata
Tellina (Quidnipagus) sp. Linnaeus 1758
Tellina (Eurytellina) sp. (Fischer 1887)
Tellina (Eurytellina) sp. (Fischer 1887)
Tellina (Tellinella) hilli
Tellina (Tellinella) pseudohilli
Bivalvia - Cardiida - Donacidae
Donax (Hecuba) sp. (Schumacher 1817)
Bivalvia - Cardiida - Solecurtidae
Solecurtus luzonensis
Bivalvia - Cardiida - Psammobiidae
Macrosolen madlumensis
Gari (Gari) natensis
Bivalvia - Cardiida - Cardiidae
Trachycardium protosubrugosum (Noetling 1901)
Trachycardium aff. minbuense (Noetling 1901)
Trachycardium minbuense (Noetling 1901)
Acrosterigma (Vasticardium) njalindungense
Fragum thetregyinense
Clinocardium sp. Keen 1936
Vepricardium (Hedecardium) sp. (Marwick 1944)
original and current combination Hedecardium
Cerastoderma sp. Mörch 1853
Bivalvia - Pholadida - Corbulidae
Corbula sp. Bruguière 1789
Corbula (Corbula) tunicosulcata Vredenburg 1928
Corbula (Varicorbula) sulcata Lamarck 1801
Corbula harpa Archaic and Haime 1854
recombined as Corbula (Bicorbula) harpa
Bivalvia - Lucinida - Lucinidae
Milthona sp. Marwick 1931
Bivalvia - Ostreida - Gryphaeidae
Gryphaeostrea sp. Conrad 1865
Bivalvia - Ostreida - Ostreidae
Ostrea latimarginata Vredenburg 1908
Ostrea angulata Sowerby 1840
recombined as Crassostrea angulata
Bivalvia - Pectinida - Pectinidae
Chlamys (Argopecten) informal n. sp.
original and current combination Argopecten
Chlamys senatoria (Gmelin 1791)
recombined as Mimachlamys senatoria
Pecten (Amusiopecten) sp. Müller 1776
Bivalvia - Arcida - Arcidae
Trisidos informal n. sp.
Trisidos prototortuosum
Trisidos semitorta (Lamarck 1819)
Anadara submultiformis
Anadara multiformis
Anadara sp. Gray 1847
Bivalvia - Arcida - Noetiidae
Arcopsis bataviana (Martin 1883)
recombined as Arcopsis (Arcopsis) bataviana
SUBSPECIES: A. bataviana carinata
see common names

Geography
Country:India
Coordinates: 25.2° North, 90.7° East (view map)
Paleocoordinates:15.9° North, 88.6° East
Basis of coordinate:estimated from map
Geographic resolution:local area
Time
Period:Neogene Epoch:Miocene
10 m.y. bin:Cenozoic 5
Key time interval:Early/Lower Miocene
Age range of interval:23.03000 - 15.98000 m.y. ago
Stratigraphy
Formation:Baghmara
Stratigraphic resolution:group of beds
Stratigraphy comments: 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.
Lithology and environment
Primary lithology:gray poorly lithified silty sandstone
Secondary lithology:red lithified "limestone"
Includes fossils?Y
Includes fossils?Y
Lithology description: SPECIFIC LITHOLOGY: Grey colored, soft, micaceous, silty sandstone. LITHIFICATION: From both lithified and poorly-lithified facies, as stated in text.
Environment:coastal indet.
Geology comments: ENVIRONMENT: Shallow siliciclastic marine environment.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Collection methods:surface (in situ),field collection
Reason for describing collection:biostratigraphic analysis
Collection method comments: 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.
Taxonomic list comments:COVERAGES: Probably exhaustive for gastropoda and bivalvia. Some fishes also listed. NOMENCLATURE: Appears relatively modern nomenclature, with consistent use of subgeneric and species-level assignments.
Metadata
Database number:72083
Authorizer:A. Hendy Enterer:A. Hendy
Research group:marine invertebrate
Created:2007-05-24 07:44:36 Last modified:2013-11-25 13:37:23
Access level:authorizer only Released:2008-05-24 07:44:36
Creative Commons license:CC BY
Reference information

Primary reference:
24392. 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]

Secondary references:

36478 M. Harzhauser, M. Euter, W. E. Piller, B. Berning, A. Kroh and O. Mandic. 2009. Oligocene and Early Miocene gastropods from Kutch (NW India) document an early biogeographic switch from Western Tethys to Indo-Pacific. Palaeontologische Zeitschrift 83:333-372 [A. Hendy/A. Hendy]