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 | |
Myliobatis sp. Cuvier 1816 eagle ray | |
"Galeocerdo cuvieri" = Galeocerdo cuvier
"Galeocerdo cuvieri" = Galeocerdo cuvier Peron and LeSueur 1822 tiger shark | |
Carcharodon sp. Smith 1838 white shark
Isurus spallanzanii mackerel shark | |
Gastropoda | |
Architectonica cyclostomum, "Architectonica perspectivum" = Architectonica perspectiva
Architectonica cyclostomum sundial
"Architectonica perspectivum" = Architectonica perspectiva Linnaeus 1767 sundial | |
Acteon ghoshi snail | |
"Archimedella (Torculoidella) angulata" = Kapalmerella ranikoti, Protoma rectrodialatatum, Turritella pinfoldi, Turritella heberti
"Archimedella (Torculoidella) angulata" = Kapalmerella ranikoti Vredenburg 1928 turret shell
Protoma rectrodialatatum turret shell
Turritella pinfoldi Vredenburg 1921 turret shell | |
Hipponix sp. Defrance 1819 hoof shell | |
Natica coxi Mukerjee 1939 moon snail | |
Latirus duplicatus Vredenburg 1925 snail | |
Nassaria neocolubrina snail
Nassaria birmanica Vredenburg 1921 snail
Nassarius ovum Martin 1879 snail | |
Cantharus sp. Röding 1798 true whelk
Cantharus eurythrosyoma true whelk
Siphonalia (Kelletia) subspadicea Vredenburg 1921 true whelk | |
"Cancellaria (Bivetopsia) dertonensis" = Bivetopsia
"Cancellaria (Bivetopsia) dertonensis" = Bivetopsia snail | |
Mitra granatiformis, "Mitra (Chrysome) sowerbyi" = Chrysame sowerbyi
Mitra granatiformis mitre shell
"Mitra (Chrysome) sowerbyi" = Chrysame sowerbyi d'Orbigny 1852 mitre shell | |
Drillia intertincta snail | |
"Mangelia sp." = Cythara (Mangelia)
"Mangelia sp." = Cythara (Mangelia) Loven 1846 snail | |
Duplicaria protoduplicata, "Terebra samarangana" = Terebra (Noditerebra) samarangana, Duplicaria woodwardiana, "Terebra sp." = Terebra, "Terebra aff. xoci" = Terebra, Terebra perturrita1, "Subula sp." = Terebra, Terebra aff. coxi, Terebra promensis
Duplicaria protoduplicata auger snail
"Terebra samarangana" = Terebra (Noditerebra) samarangana Martin 1884 auger snail
"Terebra sp." = Terebra Bruguière 1789 auger snail
"Terebra aff. xoci" = Terebra auger snail
"Subula sp." = Terebra Bruguière 1789 auger snail
Terebra aff. coxi Dey 1961 auger snail | |
Turricula promensis Vredenburg 1921 snail | |
Conus (Leptoconus) bonneti Cossmann 1900 cone shell
Conus (Lithoconus) ineditus Michelotti 1861 cone shell | |
Turris (Gemmula) sindiensis Vredenburg 1925 turrid | |
"Oliva (Anazola) djocdjocarte" = Anazola, Oliva indica2, Ancilla djocdjocarte, Ancilla (Sparella) birmanica, "Ancilla (Sparella) indica" = Ancilla indica
"Oliva (Anazola) djocdjocarte" = Anazola olive snail
Ancilla djocdjocarte olive snail
Ancilla (Sparella) birmanica Vredenburg 1921 olive snail
"Ancilla (Sparella) indica" = Ancilla indica Vredenburg 1925 olive snail | |
Paradrillia serana ribbed mitre | |
Lyria "n. sp." Gray 1847 volute | |
Murex sp. Linnaeus 1758 murex snail
Murex (Tubicauda) cf. sondeiamus murex snail
"Murex (Chicoreus) arrakensis" = Chicoreus murex snail | |
"Rimella (Dientomochilus) javana" = Varicospira javana
"Rimella (Dientomochilus) javana" = Varicospira javana Martin 1879 snail | |
"Gyrineum tuberculatum" = Ranella tubercularis
"Gyrineum tuberculatum" = Ranella tubercularis Risso 1826 snail | |
Bursa elegans frog shell | |
Semicassis sp. Mörch 1852 snail | |
Gyrineum bituberculatum triton shell | |
Ficus cf. conditus Brongniart 1823 fig shell | |
Vermetus javanus Martin 1879 worm shell | |
Bivalvia | |
Nuculana virgo Martin 1879 pointed nut clam | |
Nucula pulchra nut clam
Nucula (Lamellinucula) "n. sp." Schenck 1944 nut clam | |
"Chlamys (Aequipecten) prototransquebaricus" = Aequipecten
"Chlamys (Aequipecten) prototransquebaricus" = Aequipecten scallop | |
Crassostrea brongiarti oyster
Ostrea "n. sp." Linnaeus 1758 oyster | |
Cucullaea "n. sp." Lamarck 1801 clam | |
Bentharca "n. sp.", Trisidos tortuosa, Scapharca "n. sp. 1", Scapharca gendingensis, Scapharca "n. sp. 2", Scapharca ferruginea, Anadara sp., Anadara "n. sp.", Anadara verbeeki, Anadara daviesi, Anadara dichotoma, Anadara craticulata, Anadara garoensis, "Anadara granosa" = Anadara (Tegillarca) granosa, Anadara (Lunarca) sp.
Bentharca "n. sp." Verrill and Bush 1898 clam
Trisidos tortuosa Linnaeus 1758 clam
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 daviesi Mukerjee 1939 ark
Anadara dichotoma Deshayes 1863 ark
Anadara craticulata Nyst 1848 ark
Anadara garoensis Mukerjee 1939 ark
"Anadara granosa" = Anadara (Tegillarca) granosa Linnaeus 1758 ark
Anadara (Lunarca) sp. Gray 1857 ark | |
Trachycardium sindensis cockle | |
Apolymetis grimesi tellin clam | |
Diplodonta "n. sp." Bronn 1831 clam | |
Timoclea subspadicea, Paphia (Callistotapes) liratus, Paphia (Callistotapes) pseudoliratus, Pitar "n. sp.", Pitar aff. simonnei, Pitar porrecta, "Callista (Costacallista) "sp. 1"" = Costacallista, "Callista (Costacallista) sp." = Costacallista, "Callista (Costacallista) "n. sp. 2"" = Costacallista, Meretrix "n. sp.", Meretrix persica, Clementia protopapyracea, Callista (Costacallista) florida, Callista (Costacallista) splendida
Timoclea subspadicea venus clam
Paphia (Callistotapes) liratus venus clam
Paphia (Callistotapes) pseudoliratus Vredenburg 1928 venus clam
Pitar "n. sp." Römer 1857 venus clam
Pitar aff. simonnei Dey 1961 venus clam
Pitar porrecta Koenen 1894 venus clam
"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
Meretrix "n. sp." Lamarck 1799 venus clam
Meretrix persica Cox 1936 venus clam
Clementia protopapyracea Vredenburg 1928 venus clam
Callista (Costacallista) florida Lamarck 1818 venus clam
Callista (Costacallista) splendida Mérian 1860 venus 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 | |
Arctica sp. Schumacher 1817 clam | |
"Corbula (Varicorbula) socialis" = Corbula (Anisocorbula) socialis, Corbula (Solidicorbula) "n. sp."
"Corbula (Varicorbula) socialis" = Corbula (Anisocorbula) socialis Martin 1879 clam | |
Ensis "n. sp." Schumacher 1817 clam | |
Lucina pagana Noetling 1901 clam |