CATALOG OF ORIGINAL DESCRIPTIONS: Subbotina danvillensis subsp. karpatica Myatliuk 1970
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Subbotina karpatica Myatliuk 1970 Para 50_12-13.jpg
Subbotina danvillensis subsp. karpatica
Citation: Subbotina danvillensis subsp. karpatica Myatliuk 1970Taxonomic rank: sub-speciesType specimens: pl. 50, figs. 7a-c, 8a-c, 9a-c, 1Oa-c, 11a-c, 12a, c, 13a, c, originals (a, dorsal views; b, peripheral views; c, ventral views).Type age (chronostrat): Figured originals (figs. 7-13) from the Upper Eocene, Popeli Formation, Brizalina pseudoaenariensis-Asterigerina rogalai zone. Also occurs in the Lower Oligocene, Lopyanetskaya [after the place name Lopyanki] Formation.Type locality: Along the Yasenka River in the Khyrov area, Pokut'ye, eastern Carpathians, Ukraine, USSR. Also found in the Ukrainian eastern Carpathians along the Bystritsa-Nadvornyanskaya and Rybnitsa Rivers. Type repository: VNIGRI
Current identification:
Original Description [Translation from the Russian. - Test very small, dorsal side f1at, ventral side a little more convex. Consists of two, more rarely 2.5, whorls, with 9-13 chambers visible in them. First whorl very narrow, barely discernible, second one very broad, four or five times as wide as the first whorl. Chambers in the first whorl small, subrounded, flat, later chambers become subspherical, and almost as high as wide. Very last chamber in most of the specimens slightly produced. It lies above the three preceding chambers and is a little less wide than the diameter of the entire test. Sutures depressed, straight. Umbilicus very small, usually filled with rock. Peripheral margin lobate, broadly rounded. Aperture at the base of the last chamber, takes the form of a slit-shaped opening covered by a thin lip. Wall very thin, covered by thin, small spinules. Size: Dimensions, mm.: Diameter 0.09-0.24, height 0.04-0.14. Dimensions of figured specimens, mm.: Fig. 7, diameter 0.21, height 0.14, width of last chamber 0.16; fig. 8, diameter 0.19, height 0.1 2; fig. 9, diameter 0.14, height 0.09; fig. 10, diameter 0.16, height 0.09; fig. 11, diameter 0.1 2, height 0.06; fig. 12, diameter 0.16, height 0.08. Extra details from original publication [General remarks and comparison. - The specimens we have examined vary quite strongly in size (0.09-0.24 mm.), degree of flattening, total number of chambers (9-13), size of the chambers in the first whorl, and number of chambers in the last whorl. In the author's opinion, among the specimens of the form described that were found there are forms of different generations: microspheric and megalospheric. Microspheric forms (figs. 7, 8, 11 , 13) characteristically have quite small and entirely flat tests, and in more mature forms there are around 2.5 whorls. The first I -1.5 whorls consist of 5-7 very small chambers. In megalospheric forms (figs. 9, 10) the test consists of 2 whorls, in which no more than 8 chambers are noted. The pro!oculus and the next 3-4 chambers as well are much larger than in the microspheric forms. The central part of the test is also somewhat more convex by comparison with the microspheric test. Among the megalospheric forms tests with nearly 4 chambers in the last whorl are rarely found, if the ventral side is specifically examined (fig. 9).
[In the shape of the spire, dimensions, number and arrangement of chambers, and also in test wall spinosity the specimens described doubtless are referable to "Globigerina" danvillensis Howe and Wallace (1932, Louisiana Dept. Cons., Geol. Bull., no. 2, p. 74, pl. 10, fig. 9) from the Upper Eocene of Louisiana. These authors figured a test of the megalospheric form of the species. From the Louisiana form ours differs by the narrow slitlike aperture, covered over by a laminar lip. Tests with an arcuate aperture, typical for the first subspecies, are not observed at all. Based on marginal position of the aperture this species is referred to Subbotina, however, the spinose structure of the wall creates something of a complication in determination of the genus. ]
References:
Myatliuk, L. V. (1970). Foraminifera from the flysch deposits of the Eastern Carpathians (Cretaceous-Palaeogene). Trudy Vsesoyuznego Neftyanogo Nauchno-Issledovatel'skogo Geologo-Razvedochnogo Instituta (VNIGRI). 282: 1-225. gs
Subbotina danvillensis subsp. karpatica compiled by the pforams@mikrotax project teamviewed: 10-5-2026
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François
105
Mar 2018
François
published as a subspecies of Subbotina danvillensis = Subbotina danvillensis subsp. karpatica Myatlyuk, 1970
Jeremy Young
586
Jan 2017
Jeremy Young(UK)
corrected, many thanks. Jeremy
1
François
105
Mar 2018
François
Subbotina danvillensis subsp. karpatica Myatlyuk, 1970 according to E&M
For the pagination: Myatlyuk, E. V. (1970). Фораминиферы флишевых отложений Восточных Карпат (мел-палеоген) - Foraminifera of the flysch deposits of the eastern Carpathians (Cretaceous-Paleogene). Proceedings of the Oil Research Geological Institute (ВНИГРИ-VNIGRI). 282: 1-225.
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Subbotina karpatica Myatliuk 1970 Para 50_11.jpg
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Subbotina karpatica Myatliuk 1970 Para 50_12-13.jpg
Comments (4)
published as a subspecies of Subbotina danvillensis = Subbotina danvillensis subsp. karpatica Myatlyuk, 1970
corrected, many thanks. Jeremy
Subbotina danvillensis subsp. karpatica Myatlyuk, 1970 according to E&M
For the pagination: Myatlyuk, E. V. (1970). Фораминиферы флишевых отложений Восточных Карпат (мел-палеоген) - Foraminifera of the flysch deposits of the eastern Carpathians (Cretaceous-Paleogene). Proceedings of the Oil Research Geological Institute (ВНИГРИ-VNIGRI). 282: 1-225.
corrected thanks