Yerrapalli Formation

Add links
Coordinates: 18°54′N 79°42′E / 18.9°N 79.7°E / 18.9; 79.7
Source: Wikipedia, the free encyclopedia.

Yerrapalli Formation
Ma
↓
Type
Approximate paleocoordinates
51°24′S 48°30′E / 51.4°S 48.5°E / -51.4; 48.5
RegionAndhra Pradesh, Telangana
Country India
ExtentPranhita–Godavari Basin
Type section
Named forYerrapalli village
Named byJain et al.
Year defined1964
Yerrapalli Formation is located in India
Yerrapalli Formation
Yerrapalli Formation (India)
Yerrapalli Formation is located in Telangana
Yerrapalli Formation

The Yerrapalli Formation is a

dicynodonts.[3]

Geology

Most of the Yerrapalli Formation consists of red mudstones. The mudstones were deposited across a

monsoonal with both wet and dry seasons.[4]

The Yerrapalli Formation overlies the

members of the Yerrapalli Formation have been recognized; a lower member consisting of layers of red and purple clay with lenses of pale green clay and an upper member consisting of alternating layers of clay and fine-grained sandstone.[4]

Paleobiota

The paleobiota of the Yerrapalli Formation is similar to that of the overlying Maleri Formation, which also preserves fossils of temnospondyls and archosauromorphs. The main difference between the Yerrapalli and the Maleri faunae is the presence of dicynodonts in the former. The discovery of dicynodont fossils in the Pranhita-Godavari Basin in 1964 was one of the earliest indications that the Yerrapalli Formation represented a distinct paleofauna. Before this discovery, Yerrapalli strata were grouped within the Maleri Formation.[4] The dicynodonts of the Yerrapalli Formation are similar to those of the Ntawere Formation in Zambia, which also dates back to the Anisian. During the Middle Triassic, what is now India and southern Africa formed one continuous landmass as part of the supercontinent Gondwana.

Synapsids

Taxon Material Notes Images
Rechnisaurus cristarhynchus[5]
 A mostly complete skull A
dicynodont
Trirachodontidae indet.[6] Isolated teeth
Wadiasaurus indicus[5]
 A kannemeyeriiform dicynodont

Reptiles

Taxon Material Notes Images
Bharitalasuchus tapani [7]
 An
archosauriform
Mesodapedon kuttyi[8]
 Two specimens including skull bones A
Stenaulorhynchus stockleyi from the Manda Formation
of Tanzania, which is the same age as the Yerrapalli Formation
Pamelaria dolichotrachela[9]
 One complete skeleton, one partial skeleton, and isolated bones A long-necked
archosauromorph
Yarasuchus deccanensis[11]
 An articulated, nearly complete skeleton and a partial disarticulated skeleton A long-necked aphanosaurian avemetatarsalian

Amphibians

Taxon Material Notes Images
"Parotosuchus" rajareddyi A
temnospondyl first referred to Parotosuchus but more recently considered either a species of Eryosuchus or of Stanocephalosaurus[3]

Fish

Taxon Material Notes Images
Ceratodus sp.[6]
 A lungfish
Saurichthyidae sp.[6]
 A
ray-finned fish
Color key
Taxon Reclassified taxon Taxon falsely reported as present Dubious taxon or junior synonym Ichnotaxon
Ootaxon
Morphotaxon
Notes
Uncertain or tentative taxa are in small text; crossed out taxa are discredited.

See also

References

  1. doi:10.1306/74D71F0A-2B21-11D7-8648000102C1865D
    .
  2. ^ Yerrapalli Formation at Fossilworks.org
  3. ^
    ISBN 9780231135221
    .
  4. ^
    doi:10.1098/rstb.1988.0072
    .
  5. ^ a b Chowdhury, T.R. (1970). "Two new dicynodonts from the Triassic Yerrapalli Formation of central India" (PDF). Palaeontology. 13 (1): 132–144.
  6. ^ a b c Jain, S.L. (1996). "Aspects of vertebrate fossils from Pranhita-Godavari Valley with emphasis on dinosaur discoveries" (PDF). Journal of the Palaeontological Society of India. 41: 1–16.
  7. S2CID 234217303
    .
  8. ^ Chatterjee, S. (1980). "The evolution of Rhyncosaurs". Mémoires de la Société Géologique de France. 139: 57–65.
  9. doi:10.1016/S1367-9120(02)00110-4
    .
  10. ISSN 0003-0090
    .
  11. doi:10.1111/j.1475-4983.2004.00438.x
    .
Retrieved from "https://en.wikipedia.org/w/index.php?title=Yerrapalli_Formation&oldid=1191386853"