Albian representatives of Lytoceratina Hyatt, 1889 in Northwestern Bulgaria

Pages: 
pp. 45-64
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
Abstract: 

Albian in Northwestern Bulgaria is rich in ammonite fauna. The representatives of suborder Lytoceratina are comparatively scarce in the Albian ammonite associations. They derive from the marls of the Sumer Formation and from the glauconitic marls and sandstones of the Malo Peštene Formation. A total of 18 species and subspecies are described, which are distributed as follows: Ammonoceratites (Ammonoceratites) - 1: A. (Argonauticeras) – 1; Pictetia 2: Tetragonites – 1; Protetragonites  – 1; Eogaudryceras (Eogaudryceras) – 2; E. (Eotetragonites) 2; Anagaudriceras – 3; Kosmalella – 5. Most of the latter are established and described for the first time in Bulgarian paleontological literature. The specimens described are kept in the collection of the Paleontological Museum of Sofia University.

М. Иванов. Представители Lytoceratina Hyatt, 1889 альбского яруса Северо-Западной Болгарии. Альбский ярус в Северо-Западной Болгарии содержит богатые аммонитовые фауны. Представители подотряда Lytoceratina сравнительно редки в альбских аммонитовых ассоциациях. Они происходят из мергелей Сумерской свиты и глауконитовых мергелей и песчаников Малопещенской свиты. Описанные 18 видов и подвидов распределены следующим образом: Аmmonoceratites (Ammonoceratites) 1; A. (Argonauticeras) - 1; Pictetia - 2; Tetragonites - 1; Protetragonites - 1; Eogaudryceras (Eogaudryceras) - 2; E.(Eotetragonites) - 2; Anagaudryceras - 3; Kossmatella - 5. Большая часть из них установлена и описана впервые в болгарской палеонтологической литературе. Образцы сохраняются в коллекции Музея Палеонтологии Софийского университета.

VOLUME 23 (3)/June 1993

Scientific Institute of Mineral Resources 23, Sitnyakovo Blvd, 1505 Sofia, Bulgaria
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Committee of Geology and Mineral Resources, 22, Maria-Louisa Blud, 1000 Sofia, Bulgaria

Geological Institute, Georgian Academy of Sciences, 380093 Tbilisi, Georgia
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Geological Institute, Georgian Academy of Sciences, 380093 Tbilisi, Georgia
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Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, 117334 Moscow
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State University of Tbilisi, 380009 Tbilisi, Georgia
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Geological Institute, Georgian Academy of Sciences, 380093 Tbilisi, Georgia
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Geological Institute, Georgian Academy of Sciences, 380093 Tbilisi, Georgia
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Caucasian Institute of Mineral Resources, 380062 Tbilisi, Georgia

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

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

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

Research Institute for Mineral Deposits, 1505 Sofia (now - Geology and Geophysics Limited)
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Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria