Parvamussium fallax (Korobkov, 1936)
KOROBKOV, I. A. 1936. Contribution to the knowledge about the Paleogene faunas from the Northern Caucasus. Trudy geologicheskoy sluzhby Groznefti, 9: 32-84 (in Russian with English summary). [p. 40, pl. 1, figs. 1-13]
1936 Variamussium fallax Korobkov, 1936
«In the Paratethys this morphotype of P. felsineum with strongly radial sculpture is reported from the Lower Miocene clayey deposits (Karpatian) of Slovenia and Slovakia, and from the Mid dle Mio cene (Lower Badenian) of Poland (Meznerics, 1936, pl. 1, figs. 1–6; Harzhauser et al., 2011, fig. 11.1–4; Krach 1957, pl. 1, figs. 1, 18, respec tively).
Moreover, the presence of P. felsineum is documented in several outcrops of the Lower Badenian in the north-western Bulgaria (Kojumdgieva, 1969, 86, pl. 2, figs. 3–11) and in the Lower-Middle Miocene of the Vienna Basin in Austria (Deperet and Roman, 1928, pl. 27, figs. 12, 12a, 13, 13a; Schultz, 2001, 162–164, pl. 15, figs. 10, 10a, 11, 11a). The considered morphotype styriaca resembles very closely P. fallax (Korobkov, 1936) wide spread in Upper Eocene strata in Caucasus, Russia and Georgia (Korobkov, 1936, p. 70, 71, pl. 1, figs. 1–13, pl. 2, figs. 1–3; Korobkov, 1954, pl. 73, figs. 3–5), west wards to Hungary (Báldi, 1986, pl. 1, fig. 1). The two species are some what elongated and slightly posteriorly oblique in shape with similar reticulate sculpture visible on the left valve. More over, they have the same shape and number of internal riblets re stricted to the proximal four-fifths of the height and lack of interstitial riblets. In the opinion of the senior author, these morphological shell features suggest that P. felsineum might be a di rect descendent of the Eocene P. fallax.» STUDENCKA, B., V. A. PRYSYAZHNYUK & S.A. LJUL’EVA. 2012. First record of the bivalve species Parvamussium fenestratum (Forbes, 1844) from the Middel Miocene of the Paratethys. Geological Quarterly, 56 (3): 513-528, figs. 1-5. [p. 523]
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Variamussium fallax Korobkov, 1937; I. A. Korobkov, 1949, Class Lamellibranchiata, in Atlas of the guide forms of the fossils faunas of the USSR, vol. XII, plate 27, figures 1-4.
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