Vassil Tzankov
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Vassil Tzankov Tzankov was a Bulgarian geologist and paleontologist. He is best known for his work on Upper Cretaceous ammonites and bivalves. Tzankov was head of Bulgarian Geological Survey from 1941
Professor Vassil Tzankov 1977
The Main Hall of the Museum of Paleontology and Historical Geology, Sofia University
Parapuzosia doubreei (Grossouvre, 1894), Santonian, Shumen, exhibit at the SUMPHG
Parapuzosia daubreei (Grossouvre, 1894), Santonian, Shumen, exhibit at the SUMPHG
Holcodiscus
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Holcodiscus is an extinct ammonite genus placed in the family Holcodiscidae. Species in this genus were fast-moving nektonic carnivores. The type species of the genus is Ammonites caillaudianus.
Vassil Tzankov
…doubreei (Grossouvre, 1894), Santonian, Shumen, exhibit at the SUMPHG Parapuzosia daubreei (Grossouvre, 1894), Santonian, Shumen, exhibit at the SUMPHG Holcodiscus irregularis Tzankov, 1935, Barremian, Razgrad, Cr1 1711 (Coll. V. Tzankov) at SUMPHG Spitidiscus fallacior (Coquand), Barremian, Razgrad, Cr1 1713…
Holcodiscidae Holcodiscus fallax
Holcodiscus mediocostatus Tzankov, 1935, Barremian, Razgrad, Cr1 1716 (Coll. V. Tzankov) at the Sofia University Museum of Paleontology and Historical Geology