Aalenian and Lowermost Bajocian ammonites (Hammatoceratinae and early Otoitidae) from the Western and Central Balkan Mountains (Bulgaria)

Pages: 
pp. 59-70
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
Abstract: 

Five taxa of the species group, belonging to the subfamily Hammatoceratinae and one species ofthe family Otoitidae are described and figured in the present paper, for the first time in this country. From the subfamily Hammatoceratinae they are Pseudammatoceras subinsigne (Oppel, 1856), Pseudammatoceras cf. ornatum Elmi, 1963, Pseudammatoceras broilii (Renz, 1925), Planammatoceras planiforme Buckman, 1922 (Aalenian, Ludwigia murchisonae Zone) and Parammatoceras boyeri Elmi, 1963 (Aalenian, Graphoceras concavum Zone), and from the family Otoitidae - Docidoceras cf. cylindroides Buckman, 1919 (Lower Bajocian, Hyperlioceras discites Zone).

Л. Методиев, И. Caпунов. Ааленские и нижнебайосские амониты (Hammatoceratinae и ранние Otoitidae), Западный и Цеmnральный Балкан (Болгария). В этой работе в первый раз в Болгарии, описаны и фигурированы пять таксонов видовой группы. Они принадлежат к подсемейству Hammatoceratinae, а один вид - к семейству Otoitidae. К подсемейству Hammatoceratinae принадлежат Pseudammatoceras subinsigne (Oppel, 1856), Pseudammatoceras cf. ornatum Elmi, 1963, Pseudammatoceras broilii (Renz, 1925), Planammatoceras planiforme Buckman, 1922 (ааленский ярус, зона Ludwigia murchisonae) и Parammatoceras boyeri Elmi, 1963 (ааленский ярус, зона Graphoceras concavum), а к семейству Otoitidae - Docidoceras cf. cylindroides Buckman, 1919 (нижний байоссский подъярус, зона Hyperlioceras discites).

Keywords: 

Middle Jurassic (Aalenian, Lower Bajocian) ammonites, taxonomy, biostratigraphy, Bulgaria

VOLUME 31 (3-4)/December 2001

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Université Paul-Sabatier, 31062 Toulouse Cedex 4, France
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria

Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria

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