Bagmara - Baghmara Fm (Miocene of India)

Where: India (25.2° N, 90.7° E: paleocoordinates 15.9° N, 88.6° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Baghmara Formation, Early/Lower Miocene (23.0 - 16.0 Ma)

• STRATIGRAPHIC RELATIONS: Assumed by Hendy (2007) to originate from the Baghmara Fm, which regionally conformably underlies the Chengapara Fm (Burdigalian). AGE: Aquitaian-Burdigalian. STRATIGRAPHIC POSITION: From unknown position within formation

• bed-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; poorly lithified, fine-grained, shelly/skeletal marl and lithified, concretionary sandstone

• ENVIRONMENT: Depth of "thirty fathoms", therefore assigned in a relatively shallow water environment.
• SPECIFIC LITHOLOGY: Soft, fine-grained, bluish grey shell marl, and in the intercalatory concretionary sandy hard beds. LITHIFICATION:

Size class: macrofossils

Preservation: original aragonite, original calcite

Collected by Mukerjee in 1924; reposited in the BMNH

• COLLECTORS: P.N. Mukerjee (1924). REPOSITORY: British Museum of Natural History.

Primary reference: P. N. Mukerjee. 1939. Fossil fauna from the Tertiary of Garo Hills, Assam. Palaeontologia Indica 28(1):1-101 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 76573: authorized by Austin Hendy, entered by Austin Hendy on 23.11.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• COMPLETENESS: Exhaustive for mollusca (gastropoda, bivalvia, scaphopoda), but not including other groups. NOMENCLATURE: Antiquated nomenclature, but using species resolution asisgnments. Nomenclature may be updated with more recent publications (e.g. Lyngdoh et al., 1999; Harzhauser 2007)
Bivalvia
 Nuculanida - Nuculanidae
Nuculana virgo Martin 1879 pointed nut clam
 Nuculida - Nuculidae
Nucula alcocki Noetling 1895 nut clam
 Arcida - Arcidae
Anadara daviesi n. sp. Mukerjee 1939 ark
Anadara garoensis n. sp. Mukerjee 1939 ark
"Anadara granosa" = Anadara (Tegillarca) granosa Linnaeus 1758 ark
Anadara craticulata Nyst 1848 ark
Trisidos tortuosa Linnaeus 1758 clam
 Arcida - Noetiidae
"Barbatia bataviana" = Arcopsis (Arcopsis) bataviana
"Barbatia bataviana" = Arcopsis (Arcopsis) bataviana Martin 1883 clam
SUBSPECIES: B. bataviana carinata
 Pectinida - Pectinoidae
"Chlamys senatoria" = Mimachlamys senatoria
"Chlamys senatoria" = Mimachlamys senatoria Gmelin 1791 scallop
 Pectinida - Anomiidae
Anomia cf. ephippium Linnaeus 1758 jingle
Indoplacuna sindiensis Vredenburg 1923 scallop
 Ostreida - Ostreidae
Ostrea latimarginata Vredenburg 1908 oyster
 Ostreida - Gryphaeidae
"Ostrea hyotis" = Hyotissa hyotis
"Ostrea hyotis" = Hyotissa hyotis Linnaeus 1758 Honeycomb Oyster
 Ostreida - Pinnidae
"Pinna (Atrina) cf. vexillum" = Pinna vexillum
"Pinna (Atrina) cf. vexillum" = Pinna vexillum Born 1778 oyster
 Solenida - Pharidae
Ensis sp. Schumacher 1817 clam
 Cardiida - Cardiidae
 Cardiida - Psammobiidae
Psammobia kingi Noetling 1901 clam
 Cardiida - Tellinidae
Apolymetis grimesi tellin clam
"Tellina indifferens" = Tellina (Moerella) indifferens Noetling 1901 tellin clam
Tellina protostriatula Noetling 1901 tellin clam
 Cardiida - Donacidae
Donax (Hecuba) protoflexuosa Noetling 1901 clam
 Cardiida - Ungulinidae
"Taras (Diplodonta) rotundatus" = Diplodonta, "Taras (Diplodonta) incerta" = Diplodonta incerta
"Taras (Diplodonta) rotundatus" = Diplodonta clam
"Taras (Diplodonta) incerta" = Diplodonta incerta d'Archiac 1850 clam
 Cardiida - Mactridae
Mactra (Heteromactra) grateloupi Cossmann and Peyrot 1909 clam
"Mactra protoreevesii" = Mactra (Mactra) protoreevesii Noetling 1901 clam
 Cardiida - Veneridae
Dosinia protojuvenilis Noetling 1901 venus clam
"Dosinia subpenicillata" = Dosina subpenicillata Vredenburg 1928 venus clam
"Macrocallista erycina" = Costacallista erycina Linnaeaus 1758 venus clam
Pitar sp. Römer 1857 venus clam
 Pholadida - Corbulidae
Corbula tunicosulcata Vredenburg 1928 clam
 Lucinida - Lucinidae
Lucina darchiaciana Noetling 1901 clam
Lucina pagana Noetling 1901 clam
 Carditida - Crassatellidae
Eucrassatella rostrata Lamarck 1805 clam
Gastropoda
 Heterostropha - Architectonicidae
Architectonica nitens Noetling 1901 sundial
"Architectonica perspectivum" = Architectonica perspectiva Linnaeus 1767 sundial
 Neotaenioglossa - Calyptraeidae
Calyptraea rugosa Noetling 1895 slipper shell
 Cerithioidea - Turritellidae
Turritella pinfoldi, "Turritella (Torculoidella) angulata" = Kapalmerella ranikoti
Turritella pinfoldi Vredenburg 1921 turret shell
"Turritella (Torculoidella) angulata" = Kapalmerella ranikoti Vredenburg 1928 turret shell
 Sorbeoconcha - Bursidae
Bursa elegans frog shell
 Sorbeoconcha - Cassidae
Cassis cf. birmanica Vredenburg 1921 snail
Galeodea cf. echinophora Linnaeus 1758 snail
 Sorbeoconcha - Cymatiidae
"Gyrineum tuberculatum" = Ranella tubercularis
"Gyrineum tuberculatum" = Ranella tubercularis Risso 1826 snail
 Sorbeoconcha - Strombidae
Tibia cf. protofusus Vredenburg 1928 true conch
 Neogastropoda - Olividae
Oliva indica Vredenburg 1925 olive snail
SUBSPECIES: O. (S.) australis indica
Ancilla (Sparella) birmanica Vredenburg 1921 olive snail
 Neogastropoda - Olivellidae
Agaronia pupa Sowerby 1840 snail
SUBSPECIES: O. (A.) nebulosa pupa
 Neogastropoda - Conidae
"Conus (Leptoconus) vimineus" = Conasprella (Fusiconus) vimineus Reeve 1849 cone shell
Conus (Lithoconus) odengensis Martin 1895 cone shell
Conus (Lithoconus) kyudawonensis Vredenburg 1921 cone shell
Conus (Lithoconus) ineditus Michelotti 1861 cone shell
Conus (Dendroconus) cf. loroisii Kiener 1845 cone shell
Conus (Leptoconus) cf. bonneti Cossmann 1900 cone shell
 Neogastropoda - Terebridae
"Terebra (Myurella) reticulata" = Myurella reticulata Sowerby 1840 auger snail
Terebra (Myurella) cf. birmanica Vredenburg 1921 auger snail
Terebra (Myurella) protomyuros Noetling 1901 auger snail
"Terebra (Duplicaria) protoduplicata" = Duplicaria auger snail
Terebra (Duplicaria) woodwardiana Martin 1879 auger snail
SUBSPECIES: T. (D.) woodwardiana mindegyiensis
Terebra (Duplicaria) maunguensis Vredenburg 1921 auger snail
 Neogastropoda - Clavatulidae
Turricula promensis Vredenburg 1921 snail
 Neogastropoda - Turridae
"Turris (Gemmula) congener" = Gemmula congener Smith 1894 turrid
SUBSPECIES: T. (G.) congener mekranica
Turris (Gemmula) birmanica Vredenburg 1921 turrid
Turris (Gemmula) cf. thyrsus Vredenburg 1921 turrid
Clavatula (Perrona) birmanica Vredenburg 1921 turrid
INCLUDES: C (P.) birmanica singuensis and C (P.) birmanica birmanica
Turris garoensis n. sp. Mukerjee 1939 turrid
 Neogastropoda - Fasciolariidae
 Neogastropoda - Melongenidae
 Neogastropoda - Buccinidae
Siphonalia (Kelletia) subspadicea Vredenburg 1921 true whelk
Babylonia pangkaensis Martin 1895 true whelk
 Neogastropoda - Nassariidae
Nassaria cf. javana Martin 1879 snail
Nassaria birmanica Vredenburg 1921 snail
Nassarius ovum Martin 1879 snail
 Neogastropoda - Turbinellidae
Vasum cf. basilicum Bellardi 1872 snail
 Neogastropoda - Cancellariidae
"Cancellaria (Bivetopsia) dertonensis" = Bivetopsia, Cancellaria cf. birmanica
"Cancellaria (Bivetopsia) dertonensis" = Bivetopsia snail
Cancellaria cf. birmanica Vredenburg 1921 snail
 Neogastropoda - Mitridae
"Mitra (Chrysame) cf. sowerbyi" = Chrysame sowerbyi, Mitra granatinaeformis, Mitra chinensis
"Mitra (Chrysame) cf. sowerbyi" = Chrysame sowerbyi d'Orbigny 1852 mitre shell
Mitra granatinaeformis Martin 1884 mitre shell
Mitra chinensis Gray 1839 mitre shell
SUBSPECIES: M. chinensis subscrobiculata
 Neogastropoda - Marginellidae
Marginella (Cryptospira) birmanica Vredenburg 1923 margin shell
 Sorbeoconcha - Vermetidae
Vermetus cf. javanus Martin 1879 worm shell
 Sorbeoconcha - Naticidae
Natica cf. dydmia Bolten 1798 moon snail
Natica alapapilionis Chemntiz 1781 moon snail
Natica cf. vitellus Linnaeus 1758 moon snail
Natica helvacea Lamarck 1822 moon snail
Natica coxi n. sp. Mukerjee 1939 moon snail
"Natica epiglottina" = Cochlis epiglottina Lamarck 1804 moon snail
Sinum cf. cymba Menke 1828 moon snail
 Pseudomelanoidea - Pseudomelaniidae
"Drillia (Crassispira) cotteri" = Inquisitor cotteri
"Drillia (Crassispira) cotteri" = Inquisitor cotteri Vredenburg 1921 snail
SUBSPECIES: D. (C.) cotteri cf. decemcostata