Maastrichtian ammonites from Balochistan, Pakistan

Abstract

Maastrichtian ammonites are described from two areas in Pakistan. The upper part of the lower unit of the Korara Shale in the southern Pab Range, Kirthar Province, southern Balochistan, is dated as Late Maastrichtian, based on the presence of Menuites fresvillensis (Seunes, 1890), which is accompanied by abundant Indoceras baluchistanense Noetling, 1897, common Baculites ambatryensis Collignon, 1971, and rarer Neophylloceras surya (Forbes, 1846), Gaudryceras kayei (Forbes, 1846), Anagaudryceras politissimum (Kossmat, 1895), Kitchinites spengleri n. sp., Pachydiscus (Pachydiscus) noetlingi n. sp., Libycoceras acutodorsatus (Noetling, 1897), and Diplomoceras cylindraceum (Defrance, 1816). A smaller assemblage from the Mughal Kot Formation near Kach, Suleman Province, northern Balochistan cannot be dated more precisely than Maastrichtian from the presence of Pachydiscus (Pachydiscus) neubergicus (Hauer, 1858), the first occurrence of which has been provisionally adopted by the Subcommission on Cretaceous Stratigraphy as marking the base of the Maastrichtian stage. It is associated with numerous Eubaculites binodosus (Noetling, 1897).

Hemipelagic cephalopods from the Maastrichtian (late Cretaceous) Parras Basin at La Parra, Coahuila, Mexico, and their implications for the correlation of the lower Difunta Group

“…Hypophylloceras (Neophylloceras) surya (Forbes) is known from the Maastrichtian of southern India (Kennedy and Henderson, 1992b), Madagascar (Collignon, 1956), South Africa (Kennedy and Klinger, 1976), western Australia (Henderson and McNamara, 1985), the Biscay region, Alaska, California, Japan (Ward and Kennedy, 1993), Denmark (Birkelund, 1993), the early Maastrichtian of Mexico (Ifrim et al, 2004) and the late Maastrichtian of Pakistan (Fatmi and Kennedy, 1999) and Chile (Stinnesbeck, 1986(Stinnesbeck, , 1996.…”

“…1, Figs. 4 and 7 1995 Pseudophyllites indra ( Kennedy, 1999), southern India (Kennedy and Henderson, 1992b), western Australia (Henderson and McNamara, 1985), Chile (Stinnesbeck, 1986), California (Matsumoto, 1959b), and Madagascar (Collignon, 1956), among other localities. The Santonian record of Böse (1928) from northeastern Mexico was put into doubt by Ifrim et al (2004), but these authors described specimens from the early Maastrichtian of this region.…”

Maastrichtian cephalopods from Cerralvo, north‐eastern Mexico

“…Occurrence. Hypophylloceras (Neophylloceras) surya (Forbes) has been recorded from the Maastrichtian of southern India (Kennedy and Henderson 1992b), Madagascar (Collignon 1956), South Africa (Kennedy and Klinger 1976), western Australia (Henderson and McNamara 1985), the Biscay region, Alaska, California, Japan (Ward and Kennedy 1993) and Denmark (Birkelund 1993), and the Upper Maastrichtian of Pakistan (Fatmi and Kennedy 1999) and Chile (Stinnesbeck 1986).…”

Ammonoids from the Maastrichtian (Late Cretaceous) at El Zancudo, Nuevo Laredo, Tamaulipas, Mexico

“…Order Ammonoidea von Zittel, 1884Suborder Phylloceratina Arkell, 1950 Superfamily Phylloceratoidea von Zittel, 1884 Family Phylloceratidae von Zittel, 1884 Subfamily Phylloceratinae von Zittel, 1884 Genus Hypophylloceras Salfeld, 1924 Subgenus Hypohylloceras (Neophylloceras) Shimizu, 1934 Hypophylloceras ( (Collignon, 1956), South Africa (Kennedy and Klinger, 1976), Alaska, California, Japan (Ward and Kennedy, 1993), possibly the lower Maastrichtian of Mexico (Ifrim et al, 2004), and the upper Maastrichtian of southern India (Kennedy and Henderson, 1992), western Australia (Henderson and McNamara, 1985), the Biscay region (Ward and Kennedy, 1993), Denmark (Birkelund, 1993), Pakistan (Fatmi and Kennedy, 1999) and Chile (Stinnesbeck, 1986;Salazar et al, 2010).…”

“…The species is known from Santonian to Maastrichtian strata, and has been described from South Africa (Woods, 1906;Kennedy and Klinger, 1979), Tunisia (Pervinquière, 1907), the Biscay region (Ward and Kennedy, 1993), Pakistan (Fatmi and Kennedy, 1999), southern India (Kennedy and Henderson, 1992), western Australia (Henderson and McNamara, 1985), Chile (Stinnesbeck, 1986), California (Matsumoto, 1959), and Madagascar (Collignon, 1956), among other localities. The Santonian record of Böse (1928) from north-eastern Mexico was put into doubt by Ifrim et al (2004), but these authors described specimens from the early (2004) and middle (2010) Maastrichtian of this region.…”