CARBONATE FACIES IN LATE CRETACEOUS DINOSAURS BEARING LAMETA FORMATION, JABALPUR,CENTRAL INDIA AND THEIR IMPLICATIONS FOR PALEOENVIRONMENT RECONSTRUCTIONS

Strangely configured vessels composed of few elements interconnected in a sphere- or ring-like structure are reported from the type specimen of Amooroxylon deccanensis Bande & Prakash, a large fossil trunk from the Deccan Intertrappean Beds of central India (late Cretaceous-early Paleocene, about 66 MY before present). In the recent flora, circular vessels have been found mainly in association with branching nodes, axillary buds, wound callus, and pathogens, and they have been artificially induced by auxin. The presence of circular vessels in this fossil trunk showing no signs of branching or trauma makes this record highly unusual.

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New titanosaurid (Dinosauria: Sauropoda) from the Late Cretaceous of central India

Journal of Vertebrate Paleontology ◽

10.1080/02724634.1997.10010958 ◽

1997 ◽

Vol 17 (1) ◽

pp. 114-136 ◽

Cited By ~ 78

Author(s):

Sohan L. Jain ◽

Saswati Bandyopadhyay

Keyword(s):

Late Cretaceous ◽

Central India

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Dimorphism and a new record ofBarroisicerasDe Grossouvre (Ammonoidea) from the Coniacian of Bagh, central India

Canadian Journal of Earth Sciences ◽

10.1139/e00-059 ◽

2000 ◽

Vol 37 (10) ◽

pp. 1377-1387 ◽

Cited By ~ 12

Author(s):

T K Gangopadhyay ◽

S Bardhan

Keyword(s):

Late Cretaceous ◽

New Record ◽

Type Species ◽

Intraspecific Variability ◽

Central India ◽

Present Species ◽

Sexually Dimorphic ◽

Group B ◽

Standing Problem

Barroisiceras de Grossouvre was hitherto unknown in India. B. onilahyense Basse, which elsewhere belongs exclusively to the Coniacian, has been recorded from the Bryozoan Limestone Formation of central India. This find, as well as the presence of another time-diagnostic Coniacian ammonite, Placenticeras kaffrarium Etheridge and two inoceramid bivalves, Inoceramus (Mytiloides) incertus Jimbo and I. (Platyceramus) mantelli (Barrois) Mercey in the underlying horizons, help in resolving the long standing problem of the age of the Bagh Group. B. onilahyense shows wide intraspecific variability and overlaps morphometrically with the late Turonian type species, B. haberfellneri (Hauer). They may be conspecific. The present species has been found to be sexually dimorphic, a phenomenon previously not well recognised in the subfamily Barroisiceratinae. As in many Late Cretaceous ammonites, dimorphism is manifest mainly by differences in relative adult sizes and in strength of ornamentation, the microconch being smaller and more strongly ornamented.

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