Schlagintweit, F.; Piller, W. E. (1990). Involutina hungarica (Sido) from allochthonous Urgonian limestones of the Northern Calcareous Alps and remarks on the genus Hensonina Moullade & Peybernès, 1974. Beiträge zur Paläontologie Österreichs. 16: 145-153.

332452

Schlagintweit, F.; Piller, W. E.

1990

16: 145-153

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https://www.zobodat.at/publikation_articles.php?id=266001

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Involutina hungarica (SIDO), the youngest hitherto known representative of the genus Involutina TERQUEM, is described from Urgonian limestone pebbles (Uppermost Aptian-Albian) of the Northern Calcareous Alps. The species occurs in biosparites containing mesorbitolinas along with coralline red algae. Although the test shape of Involutina hungarica is highly variable, this species is clearly separated from the homeomorphic form Involutina liassica (JONES) by a distinctly thicker, more globular test. Hensonina lenticularis (HENSON), exhibiting identical dimensions and equivalent stratigraphic range as well as the same facies relevancy, has to be included within the variation range of Involutina hungarica (SIDO) since no pore network is detectable in the umbilical region. Hence, the monospecific genus Hensonina MOULLADE & PEYBERNES, 1974 is not a valid separate genus, but represents a junior synonym of Involutina TERQUEM, 1862

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