A new Orbitoidal foraminiferal genus Lakadongia (type species Lakadongia indica, n. gen., n. sp.) is described from the Thanetian Lakadong Limestone of Meghalaya, NE India, following a critical review of the previous works on the Paleocene (Thanetian) Orbitoidal foraminifera such as Lepidorbitoides tibetica Douvillé, Lepidocyclina (Polylepidina) punjabensis Davies, Orbitosiphon praepunjabensis Adams and Setia primitiva Ferràndez-Cañadell. Lakadongia, gen. nov. is characterized by the presence of low trochospiral, quadriserial nepionts and the duplication of equatorial chamber layers in the equatorial layer. Lakadongia indica, n. gen., n. sp. is associated with Orbitosiphon tibetica (Douvillé), and both species are assigned to one new family, the Orbitosiphonidae.
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1 November 2003
Lakadongia, a new Orbitoidal foraminiferal genus from the Thanetian (Paleocene) of Meghalaya, NE India
Kuniteru Matsumaru,
Anil K. Jauhri
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