Naskal microvertebrate site (Cretaceous of India)

Where: Andhra Pradesh, India (17.2° N, 77.9° E: paleocoordinates 29.3° S, 58.4° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Intertrappean Beds Formation, Maastrichtian (72.1 - 66.0 Ma)

• unnamed formation is one of the "Intertrappean Beds", below Deccan basal flow no. 5

Environment/lithology: fluvial-lacustrine; gray, yellow, calcareous mudstone and brown, gray, yellow mudstone

• "the inter-trappean sediments...are interpreted as distal floodplain-lacustrine deposits", also described as a "floodplain lake". Fossil-bearing layer is a calcisol.
• "gleyed mudstone, yellow mudstone, marlstone, chert, impure marlstone and calcareous mudstone". Main thickness is gleyed mudstone, "largely grey coloured and marked by yellowish-brown and brownish-black mottling at the bedding planes...weakly developed cross-bedding". Next is a "soft and friable mudstone" that lacks sedimentary structures and has "horizonal calcareous rhizoliths". Nest is "an impure mudstone bed...which possess different bands of light pink marlstone layers mottled with soft, chalky, light yellow calcareous material. The prevalence of burrowing and rooting activity characterizes this bed as an entisol." Fossil-bearing layer at top is a "calcareous mudstone...pinkish-white in the lower portion with white calcareous mottling and pinkish-grey in the upper portion with yellow mottling...multiple paleosol features, such as a lack of bedding structures, the prevalence of mottling, isolated and coalesced calcareous nodules, calcareous rhizoliths, calcretes, and the spongy nature of the sediments characterize this unit and qualify it as a calcisol."

Size classes: macrofossils, mesofossils

Collection methods: bulk, sieve,

Primary reference: G. V. R. Prasad and A. Sahni. 1988. First Cretaceous mammal from India. Nature 332:638-640 [J. Alroy/E. Leckey/E. Leckey]more details

Purpose of describing collection: taphonomic analysis

PaleoDB collection 27014: authorized by Matthew Carrano, entered by Matthew Carrano on 12.11.2002, edited by Erin Leckey, Roger Benson, Terri Cleary and Philip Mannion

Creative Commons license: CC BY (attribution)

Taxonomic list

unclassified
  -
? Colophidia indet.7
vertebrae and dentary, originally reported in Rage and Prasad, 1992
Ostracoda
  -
Ostracoda indet.3 Latreille 1802 ostracod
unclassified
  -
Mollusca indet.1 Linnaeus 1758
Chondrichthyes
 Myliobatiformes - Myliobatidae
Igdabatis indicus1 Prasad and Cappetta 1993 eagle ray
Actinopteri
 Salmoniformes -
 Kurtiformes - Apogonidae
Serranidarum sp.1 Cardinalfish
Apogonidarum sp.1 Cardinalfish
 Perciformes -
Percoideorum ellipticus1 perch-like fish
Percoideorum rangapurensis1 perch-like fish
Percoideorum "sp. 1"1 Bleeker 1859 perch-like fish
Percoideorum "sp. 2"1 Bleeker 1859 perch-like fish
 Clupeiformes - Clupeoidei
Clupeidarum sp.1 Cuvier 1817 hering
 Osteoglossiformes - Notopteridae
 Osteoglossiformes - Osteoglossidae
 Pycnodontiformes - Pycnodontidae
Pycnodus bicresta1 Kumar and Loyal 1987
 Lepisosteiformes - Lepisosteidae
Osteichthyes
  -
Apateodus striatus1 Woodward 1901
 Salientia - Pelobatidae
Pelobatidae indet.9 Lataste 1879 spadefoot toad
several humeri some are fragments
 Salientia - Hylidae
Hylidae indet.1 Rafinesque 1815 tree frog
an ilium and a humerus
 Salientia - Discoglossidae
Discoglossidae indet.6 Günther 1859 painted frog
2 ilia, three more ilia reported by same authors in 1995
Reptilia
 Testudines - Pelomedusidae
Pelomedusidae indet.9 Cope 1868 sideneck turtle
 Theropoda -
 Crocodylia -
Crocodylia indet.5 crocodilian
 Crocodylia - Crocodylidae
Crocodylus sp.10 Laurenti 1768 crocodile
ITV/Ns/Cr-381 to 400
 Crocodylia -
Asiatosuchus sp.10 Mook 1940 crocodilian
ITV/Ns/Cr-366
 Crocodylia - Alligatoridae
Allognathosuchus sp.10 Mook 1921 crocodilian
ITV/Ns/Cr-301 to 365
 Crocodylia -
Thoracosaurus sp.10 Leidy 1852 crocodilian
ITV/Ns/Cr-326 to 380
 Squamata - Anguidae
Anguidae indet.3 Gray 1825 lizard
about 50 vertebrae
 Squamata -
Serpentes indet.8 snake
vertebrae and a dentary
? Coniophis sp.2 Marsh 1892 snake
 Squamata - Nigerophiidae
Indophis sahnii n. gen. n. sp.8
Indophis sahnii n. gen. n. sp.8 Rage and Prasad 1992 snake
vertebrae
 Squamata -
Lacertilia indet. lizard
dentaries, one with pleurodont teeth
Mammalia
 Tribosphenida - Adapisoriculidae
Deccanolestes sp.1 Prasad and Sahni 1988 placental
right M2
Deccanolestes hislopi n. gen. n. sp. Prasad and Sahni 1988 placental
right lower p3 (holotype) right M1 and M3, three calcanea and two small astragali; two specimens reported by Boyer et al 2010 (Deccanolestes cf. hislopi): VPL/JU/NKIM/79 (distal left humerus); VPL/JU/NKIM/81 (proximal left ulna)
Deccanolestes robustus n. sp.4 Prasad et al. 1994 placental
dental material and an astragalus
 Allotheria - Sudamericidae
Dakshina jederi11 Wilson et al. 2007 mammal
GSI/SR/PALN071, left mf4; GSI/SR/PAL-N210, left i1; GSI/SR/PAL-N212, right mf4; VPL/JU/NKIM/25, left mf4
unclassified
  -
Charophyta indet.3 Migula 1890
Pteridopsida
 Salviniales - Salviniaceae
Ariadnaesporites sp.3 Potonié 1956
"pollen"
Gabonisporites
  -
Gabonisporites sp.3 Srivastava 1972
"pollen"