Where: India (25.2° N, 90.7° E: paleocoordinates 15.9° N, 88.6° E)
• coordinate estimated from map
• outcrop-level geographic resolution
When: Chengapara Formation, Early/Lower Miocene (23.0 - 16.0 Ma)
• STRATIGRAPHIC RELATIONS: From Zone IB of Chengapara Formation, which regionally conformably overlies the Baghmara Fm (presumanly Early Miocene) and is unconformably overlain by the Dupitila Fm. THICKNESS: Zone is 16 m in thickness, within a ~30 m thick section. AGE: Burdigalian. STRATIGRAPHIC POSITION: From middle part of section, basal part of the Chengapara Fm.
• bed-level stratigraphic resolution
Environment/lithology: coastal; poorly lithified, calcareous sandstone
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 72084: authorized by Austin Hendy, entered by Austin Hendy on 24.05.2007
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Chondrichthyes | |
Isurus spallanzanii mackerel shark
Carcharodon sp. Smith 1838 white shark | |
"Galeocerdo cuvieri" = Galeocerdo cuvier
"Galeocerdo cuvieri" = Galeocerdo cuvier Peron and LeSueur 1822 tiger shark | |
Myliobatis sp. Cuvier 1816 eagle ray | |
Bivalvia | |
Ostrea "n. sp." Linnaeus 1758 oyster
Crassostrea brongiarti oyster | |
"Chlamys (Aequipecten) prototransquebaricus" = Aequipecten
"Chlamys (Aequipecten) prototransquebaricus" = Aequipecten scallop | |
Cucullaea "n. sp." Lamarck 1801 clam | |
Scapharca "n. sp. 1", Scapharca gendingensis, Scapharca "n. sp. 2", Scapharca ferruginea, Anadara sp., Anadara "n. sp.", Anadara verbeeki, Anadara dichotoma, Anadara (Lunarca) sp., "Anadara granosa" = Anadara (Tegillarca) granosa, Anadara garoensis, Anadara craticulata, Anadara daviesi, Trisidos tortuosa, Bentharca "n. sp."
Scapharca "n. sp. 1" Gray 1847 clam
Scapharca "n. sp. 2" Gray 1847 clam
Scapharca ferruginea clam
Anadara sp. Gray 1847 ark
Anadara "n. sp." Gray 1847 ark
Anadara verbeeki ark
Anadara dichotoma Deshayes 1863 ark
Anadara (Lunarca) sp. Gray 1857 ark
"Anadara granosa" = Anadara (Tegillarca) granosa Linnaeus 1758 ark
Anadara garoensis Mukerjee 1939 ark
Anadara craticulata Nyst 1848 ark
Anadara daviesi Mukerjee 1939 ark
Trisidos tortuosa Linnaeus 1758 clam
Bentharca "n. sp." Verrill and Bush 1898 clam | |
Lucina pagana Noetling 1901 clam | |
Corbula (Solidicorbula) "n. sp.", "Corbula (Varicorbula) socialis" = Corbula (Anisocorbula) socialis
"Corbula (Varicorbula) socialis" = Corbula (Anisocorbula) socialis Martin 1879 clam | |
Arctica sp. Schumacher 1817 clam | |
"Callista (Costacallista) "sp. 1"" = Costacallista, "Callista (Costacallista) sp." = Costacallista, "Callista (Costacallista) "n. sp. 2"" = Costacallista, Pitar "n. sp.", Pitar porrecta, Pitar aff. simonnei, Clementia protopapyracea, Meretrix "n. sp.", Meretrix persica, Callista (Costacallista) splendida, Callista (Costacallista) florida, Paphia (Callistotapes) liratus, Paphia (Callistotapes) pseudoliratus, Timoclea subspadicea
"Callista (Costacallista) "sp. 1"" = Costacallista Palmer 1926 venus clam
"Callista (Costacallista) sp." = Costacallista Palmer 1926 venus clam
"Callista (Costacallista) "n. sp. 2"" = Costacallista Palmer 1926 venus clam
Pitar "n. sp." Römer 1857 venus clam
Pitar porrecta Koenen 1894 venus clam
Pitar aff. simonnei Dey 1961 venus clam
Clementia protopapyracea Vredenburg 1928 venus clam
Meretrix "n. sp." Lamarck 1799 venus clam
Meretrix persica Cox 1936 venus clam
Callista (Costacallista) splendida Mérian 1860 venus clam
Callista (Costacallista) florida Lamarck 1818 venus clam
Paphia (Callistotapes) liratus venus clam
Paphia (Callistotapes) pseudoliratus Vredenburg 1928 venus clam
Timoclea subspadicea venus clam | |
Diplodonta "n. sp." Bronn 1831 clam | |
Mactra (Allomactra) "n. sp.", Mactra (Eomactra) "n. sp.", "Mactra (Eomactra) protoreevesii" = Mactra (Mactra) protoreevesii
Mactra (Allomactra) "n. sp." Linnaeus 1767 clam
Mactra (Eomactra) "n. sp." Linnaeus 1767 clam
"Mactra (Eomactra) protoreevesii" = Mactra (Mactra) protoreevesii Noetling 1901 clam | |
Trachycardium sindensis cockle | |
Apolymetis grimesi tellin clam | |
Ensis "n. sp." Schumacher 1817 clam | |
Nucula pulchra nut clam
Nucula (Lamellinucula) "n. sp." Schenck 1944 nut clam | |
Nuculana virgo Martin 1879 pointed nut clam | |
Gastropoda | |
Natica coxi Mukerjee 1939 moon snail | |
Siphonalia (Kelletia) subspadicea Vredenburg 1921 true whelk
Cantharus sp. Röding 1798 true whelk
Cantharus eurythrosyoma true whelk | |
Nassaria neocolubrina snail
Nassaria birmanica Vredenburg 1921 snail
Nassarius ovum Martin 1879 snail | |
Latirus duplicatus Vredenburg 1925 snail | |
"Oliva (Anazola) djocdjocarte" = Anazola, Ancilla djocdjocarte, "Ancilla (Sparella) indica" = Ancilla indica, Ancilla (Sparella) birmanica, Oliva indica2
"Oliva (Anazola) djocdjocarte" = Anazola olive snail
Ancilla djocdjocarte olive snail
"Ancilla (Sparella) indica" = Ancilla indica Vredenburg 1925 olive snail
Ancilla (Sparella) birmanica Vredenburg 1921 olive snail | |
Mitra granatiformis, "Mitra (Chrysome) sowerbyi" = Chrysame sowerbyi
Mitra granatiformis mitre shell
"Mitra (Chrysome) sowerbyi" = Chrysame sowerbyi d'Orbigny 1852 mitre shell | |
Lyria "n. sp." Gray 1847 volute | |
"Murex (Chicoreus) arrakensis" = Chicoreus murex snail
Murex sp. Linnaeus 1758 murex snail
Murex (Tubicauda) cf. sondeiamus murex snail | |
"Cancellaria (Bivetopsia) dertonensis" = Bivetopsia
"Cancellaria (Bivetopsia) dertonensis" = Bivetopsia snail | |
"Mangelia sp." = Cythara (Mangelia)
"Mangelia sp." = Cythara (Mangelia) Loven 1846 snail | |
Conus (Leptoconus) bonneti Cossmann 1900 cone shell
Conus (Lithoconus) ineditus Michelotti 1861 cone shell | |
Turris (Gemmula) sindiensis Vredenburg 1925 turrid | |
Drillia intertincta snail | |
Turricula promensis Vredenburg 1921 snail | |
"Terebra sp." = Terebra, "Terebra aff. xoci" = Terebra, Terebra perturrita1, Terebra aff. coxi, "Subula sp." = Terebra, Terebra promensis, Duplicaria protoduplicata, "Terebra samarangana" = Terebra (Noditerebra) samarangana, Duplicaria woodwardiana
"Terebra sp." = Terebra Bruguière 1789 auger snail
"Terebra aff. xoci" = Terebra auger snail
Terebra aff. coxi Dey 1961 auger snail
"Subula sp." = Terebra Bruguière 1789 auger snail
Duplicaria protoduplicata auger snail
"Terebra samarangana" = Terebra (Noditerebra) samarangana Martin 1884 auger snail | |
Paradrillia serana ribbed mitre | |
"Rimella (Dientomochilus) javana" = Varicospira javana
"Rimella (Dientomochilus) javana" = Varicospira javana Martin 1879 snail | |
Semicassis sp. Mörch 1852 snail | |
Gyrineum bituberculatum triton shell | |
"Gyrineum tuberculatum" = Ranella tubercularis
"Gyrineum tuberculatum" = Ranella tubercularis Risso 1826 snail | |
Bursa elegans frog shell | |
Ficus cf. conditus Brongniart 1823 fig shell | |
Hipponix sp. Defrance 1819 hoof shell | |
Vermetus javanus Martin 1879 worm shell | |
Turritella pinfoldi, Turritella heberti, Protoma rectrodialatatum, "Archimedella (Torculoidella) angulata" = Kapalmerella ranikoti
Turritella pinfoldi Vredenburg 1921 turret shell
Protoma rectrodialatatum turret shell
"Archimedella (Torculoidella) angulata" = Kapalmerella ranikoti Vredenburg 1928 turret shell | |
Acteon ghoshi snail | |
Architectonica cyclostomum, "Architectonica perspectivum" = Architectonica perspectiva
Architectonica cyclostomum sundial
"Architectonica perspectivum" = Architectonica perspectiva Linnaeus 1767 sundial |