Faunal associations of the Middle Jurassic ammonite genus Macrocephalites in Kachchh, western India

1987 ◽  
Vol 24 (8) ◽  
pp. 1570-1582 ◽  
Author(s):  
Jai Krishna ◽  
G. E. G. Westermann
Keyword(s):  
Middle Jurassic ◽  
Western India ◽  
Nominal Species ◽  
Dimorphic Species ◽  
Lower Callovian

New collections of Macrocephalitinae from the ?Upper Bathonian – Lower Callovian of Kachchh (Cutch olim) make it possible to discern six successive taxonomically distinguishable faunal associations. These are, from above, (6) M. semilaevis association, (5) M. formosus association, (4) M. dimerus association, (3) M. elephantinus association, (2) M. madagascariensis association, (1) M. triangularis association.Of these, Nos. 1, 4, and 6 formed the bases of the M. triangularis, M. dimerus, and M. semilaevis biozones respectively. The majority of the 19 nominal species and 6 genera in the literature on Kachchh may be condensed into only 6 dimorphic species of undivided Macrocephalites.

scholarly journals Magnetostratigraphy of the Middle Jurassic Sediments from Kachchh Basin, Western India

2016 ◽  
Vol 07 (03) ◽  
pp. 301-310 ◽  
Author(s):  
Venkateshwarlu Mamilla ◽  
Bindhyachal Pandey ◽  
Deo Brat Pathak ◽  
Papanna Guguloth ◽  
Jai Krishna
Keyword(s):  
Middle Jurassic ◽  
Western India ◽  
Kachchh Basin

On the Bathonian (Middle Jurassic) ammonites Micromphalites Buckman and Gracilisphinctes Buckman from Kachchh, Western India

1984 ◽  
Vol 121 (4) ◽  
pp. 319-321 ◽  
Author(s):  
A. K. Jaitly ◽  
C. S. P. Singh
Keyword(s):  
Middle Jurassic ◽  
Western India

AbstractSystematic descriptions of specimens collected from Pachchham ‘Island’, Kachchh, Western India, belonging to the genera Micromphalites Buckman and Gracilisphinctes Buckman are given. Their affinities with the different forms belonging to the above genera are discussed and described as Micromphalites aff. hourcqui Collignon and Gracilisphinctes cf. arkelli Collignon respectively. The distribution of these two genera in other regions is also briefly discussed.

Variability in Epistreptophyllum from the middle Jurassic of Kachchh, western India: An open question for the taxonomy of Mesozoic scleractinian corals

1997 ◽  
Vol 71 (4) ◽  
pp. 564-577 ◽  
Author(s):  
D. K. Pandey ◽  
B. Lathuiliere
Keyword(s):  
Middle Jurassic ◽  
Multivariate Analyses ◽  
Great Majority ◽  
Morphological Characters ◽  
Scleractinian Corals ◽  
Western India ◽  
Wide Range ◽  
Surface Ornamentation ◽  
Open Question ◽  
Range Of Variation

Epistreptophyllum cornutiformis Gregory, 1900, is the name assigned to a Middle Jurassic population of scleractinian corals from Kachchh, western India. Measurements of ten variables from 84 specimens of this population have been statistically examined by means of univariate and multivariate analyses. A wide range of variation in corallum shape, septal perforation, lateral septal surface ornamentation, nature of the endotheca, and that of the columella is observed. The great majority of specimens are solitary. The wide range of gradational variation observed in this population corresponds to and includes the morphological characters described for various scleractinian genera such as Protethmos Gregory, Metethmos Gregory, Frechia Gregory, and Epistreptophyllum Milaschewitsch. The assignment of these genera to this later senior synonym genus is supported by the description of a well-preserved topotype from Nattheim. The ornamentation of the septa in Epistreptophyllum is detailed and distances it from typical pennular corals.

The Ammonite Zones of the Middle Jurassic Beds of East Greenland

1959 ◽  
Vol 96 (6) ◽  
pp. 505-512 ◽  
Author(s):  
J. H. Callomon
Keyword(s):  
Middle Jurassic ◽  
East Greenland ◽  
Lower Callovian ◽  
Ammonite Zones

AbstractNew discoveries have established the presence of nine ammonite zones in the Middle Jurassic beds of East Greenland. The top two are Lower Callovian; the remaining seven yield ammonites unknown from extra-Boreal provinces and are presumed to range down through the Bathonian, possibly into the Bajocian.

scholarly journals The identity of the Middle Jurassic Ostracoda <i>Fastigatocythere juglandica</i> (Jones) and <i>Lophocythere fulgurata</i> (Jones & Sherborn): a solution to an old enigma

2002 ◽  
Vol 21 (2) ◽  
pp. 155-166 ◽  
Author(s):  
Martin Ware ◽  
Robin C. Whatley
Keyword(s):  
Middle Jurassic ◽  
First Time ◽  
Lower Callovian ◽  
Ostracod Species

Abstract. The Upper Bathonian and Lower Callovian ostracod species Fastigatocythere juglandica (Jones, 1884) is shown to comprise a total of five subspecies. Of these, F. juglandica juglandica, F. juglandica major (Jones &amp; Sherborn, 1888) and F. juglandica postrotunda subsp. nov., described as new herein, are all confined to the Upper Bathonian. Lophocythere fulgurata (Jones &amp; Sherborn, 1888) is demonstrated to be an instar of F. juglandica major. Fastigatocythere juglandica degenerata subsp. nov., described as new herein and F. juglandica rugosa Weinholz comb. nov., both confined to the Lower Callovian, extend the known range of the species into that stage for the first time.

Oldest camarasauromorph sauropod (Dinosauria) discovered in the Middle Jurassic (Bajocian) of the Khadir Island, Kachchh, western India

PalZ ◽  
2006 ◽  
Vol 80 (1) ◽  
pp. 34-51 ◽  
Author(s):  
Markus Moser ◽  
Umesh B. Mathur ◽  
Franz T. Fürsich ◽  
Dhirendra K. Pandey ◽  
Neera Mathur
Keyword(s):  
Middle Jurassic ◽  
Western India
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