scholarly journals Sedimentology and stratigraphy of the Kellaways Sand Member (Lower Callovian), Burythorpe, North Yorkshire, UK

2018 ◽  
Vol 62 (1) ◽  
pp. 36-49 ◽  
Author(s):  
John H. Powell ◽  
Peter F. Rawson ◽  
James B. Riding ◽  
Jonathan R. Ford
Keyword(s):  
Lower Callovian

Callovian and Oxfordian (Jurassic) teuthids (Coleoidea, Cephalopoda) from Chile

2016 ◽  
Vol 90 (5) ◽  
pp. 910-922
Author(s):  
Alberto C. Riccardi
Keyword(s):  
New Species ◽  
New Genus ◽  
Northern Chile ◽  
A New Species ◽  
Lower Callovian

AbstractColeoid specimens from the Jurassic of northern Chile are included in two different species ofTrachyteuthis, i.e.,T. covacevichiFuchs and Schultze, 2008 andT. chilensisn. sp., and in a new genus and a new species,Pseudoteudopsis perezin. gen. n. sp. The specimens described and figured are from two different areas in northern Chile. Those referred toPseudoteudopsis perezin. gen. n. sp. came from a locality north of Calama and are associated with ammonites indicating the lower Callovian uppermostbodenbenderito lowermostproximumzones (≈gracilisStandard Zone) of the Andean ammonite zonation. Those described asT. covacevichiandT. chilensisn. sp. came from the Cordillera de Domeyko, northeast of Taltal, and are associated with ammonites indicating the middle OxfordiantransversariumZone.

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.

Les genres Obovothyris et Digonella (brachiopodes). Etude de quelques Digonella et definition de Digonella sinuata nov. sp

1962 ◽  
Vol S7-IV (2) ◽  
pp. 273-280
Author(s):  
A. Rollet
Keyword(s):  
New Species ◽  
Population Analysis ◽  
Distinct Population ◽  
A New Species ◽  
Lower Callovian

Abstract Based on morphological and biometric studies of available specimens of Obovothyris obovata from the upper Bathonian (Jurassic) beds of Bregille and of Digonella 'digona' from the lower Callovian (Jurassic) beds of Maizieres and Tarcenay, several external and internal characteristics are listed showing the differences between the two genera Obovothyris and Digonella. Biometric studies of several Digonella species for population analysis indicate the presence of three distinct population assemblages and the identification of a new species, Digonella sinuata, from the marls of Maizieres and Tarcenay of Callovian age.

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.

First record of Bathonian Bullatimorphites (Jurassic, Ammonitina) from Kachchh, India

1988 ◽  
Vol 62 (01) ◽  
pp. 148-150 ◽  
Author(s):  
D. K. Pandey ◽  
G. E. G. Westermann
Keyword(s):  
Type Species ◽  
Indian Subcontinent ◽  
First Record ◽  
The State ◽  
The Family ◽  
Lower Callovian

Only two specimens of the family Tulitidae Buckman were previously reported from Kachchh (also Cutch, Kutch, Katch, or Kachh) in the state of Gujarat, i.e., “Stephanoceras bullatum (d'Orbigny)” of Waagen (1875) from the lower Callovian Golden Oolite of Kheera. Parona and Bonarelli (1897) named Waagen's illustrated specimen “Sphaeroceras’ cosmopolitum, which Spath (1924) later designated as the type species of Kheraiceras Spath. The only other tulitid known from the Indian subcontinent is the single Bullatimorphites (Kheraiceras) cf. bullatus from the Polyphemus Limestone of Baluchistan, Pakistan, described by Noetling (1896, Pl. 6, fig. 2, 2a).

Sur l'existence d'un cycle biostratigraphique dans le Bathonien au sud-ouest du Massif ardennais (note preliminaire)

1968 ◽  
Vol S7-X (3) ◽  
pp. 303-307
Author(s):  
Jean Claude Fischer
Keyword(s):  
Lower Callovian

Abstract Bathonian-lower Callovian, five biostratigraphic phases (oolitic, chalky-marly, pseudopisolitic), interaction of rates of subsidence and sedimentation and hydrodynamics, Jurassic, France

Sur l'age (Callovien inferieur) du niveau repere median des 'terres noires' du Diois et de la region de Laragne (chaines subalpines)

1966 ◽  
Vol S7-VIII (3) ◽  
pp. 413-414
Author(s):  
Philippe Artru ◽  
Serge Elmi ◽  
Charles Mangold
Keyword(s):  
Lower Callovian

Abstract The 'middle marker horizon' of the 'black earths,' southeastern France, belongs to the Macrocephalites macrocephalus zone of earliest Callovian (Jurassic) age. Macrocephalites (subgenera Macrocephalites, Kamptokephalites, and Dolikephalites) and Bullatimorphites bullatus (d'Orb.) characterize the horizon. No elements younger than the kamptus subzone were collected; part or all of the macrocephalus subzone may be present. Bullatimorphites, although typical of the Bathonian, has been collected from lower Callovian sections at several localities in France.

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