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Middle Devonian parathuramminid and earlandiid foraminifers from shallow marine carbonates of the Carnic Alps (Austria)

Published online by Cambridge University Press:  22 March 2018

Daniel Vachard
Affiliation:
1 rue des Tilleuls, 59152 France 〈Daniel.Vachard@univ-lille1.fr〉 or 〈Daniel.Vachard@free.fr〉
Karl Krainer
Affiliation:
Institute of Geology, University of Innsbruck, Innrain 52, A-6020 Innsbruck Austria 〈Karl.Krainer@uibk.ac.at〉, 〈Alexander.Moertl@student.uibk.ac.at〉
Alexander Mörtl
Affiliation:
Institute of Geology, University of Innsbruck, Innrain 52, A-6020 Innsbruck Austria 〈Karl.Krainer@uibk.ac.at〉, 〈Alexander.Moertl@student.uibk.ac.at〉

Abstract

The Devonian of the Carnic Alps (Austria) is developed in different facies. The shallow marine facies is up to 1200 m thick. The Feldkogel Limestone of the Polinik Formation, >330 m thick, was dated as Eifelian–Late Devonian. The Feldkogel Limestone at Mount Polinik is developed in a peritidal facies composed of subtidal, intertidal, and supratidal deposits. Subtidal sediments are represented by dark gray Amphipora limestone and intertidal deposits by laminated and partly bioturbated grainstone and packstone, ostracode wackestone to packstone, and locally intercalated intraclast breccias documenting tidal channel fills. Laminated microbial mats (stromatolites) formed in a supratidal depositional environment. Grainstone and packstone contain abundant unilocular parathuramminid foraminifers. This latter group encompasses a diversified assemblage of ivanovellids, parathuramminids, uralinellids, and irregularinoids; some earlandiids are also present. They are dated herein as late Eifelian–early Givetian. These foraminifers provide a more precise systematics of these taxa, which often have not been studied for more than half a century. The taxonomic problems of their assignment to foraminifers, pseudo-foraminifers, calcitarcha, thaumatoporellaceans, volvocaleans, or other algae are also discussed. Several taxa are emendated: Parathuramminida, Parathuramminoidea, Irregularinoidea, Eovolutinidae, Ivanovellidae, Parathuramminidae, Uralinellidae, Ivanovella, Elenella, Neoarchaesphaera, Parathurammina, Bykovaella, Uralinella, and Paracaligella. The new taxa are: Ivanovella reitlingerae n. sp., Elenella polinikensis n. sp., Uralinella sabirovi n. sp., and Radiosphaerella poyarkovi n. sp.

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Articles
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Copyright © 2018, The Paleontological Society 
Figure 0

Figure 1Geographical map of the studied area with location of Mount Polinik.

Figure 1

Figure 2Top of Mount Polinik with locations of the two sections (Fig. 3) and the fossiliferous samples. Contour lines (2200, 2300) in meters.

Figure 2

Figure 3Stratigraphical columns of the studied sections with location of samples (for geographical maps, see Figures 1, 2).

Figure 3

Figure 4(1) Bioclastic and pelloidal grainstone with Vasicekia? sp. (tubular specimens with clear wall), Neoarchaesphaera ellipsoidalis, Ivanovella sp., Cribrosphaeroides (Parphia) robusta, and Amphipora sp., sample POL3. (2) Bioclastic and pelloidal grainstone with Vasicekia? sp. (tubular specimens with clear wall), Neoarchaesphaera ellipsoidalis, Parathurammina sp., and Suleimanovella sp., sample POL3c. (3) Dolomitized floatstone with Amphipora sp., sample POL10a. (4) Floatstone with Amphipora cf. A. pervesiculata and parathuramminids in the matrix, sample POL11. (5) Bioclastic and pelloidal grainstone with Vasicekia sp. (tubular specimens with clear wall), Neoarchaesphaera ellipsoidalis, Parathurammina sp., and Suleimanovella sp., sample POL11-10. (6) Bioclastic and pelloidal grainstone with Uralinella sp., Parathurammina sp., Neoarchaesphaera ellipsoidalis, Suleimanovella sp., and ostracodes, sample POL11a. Scale bars=1 mm.

Figure 4

Figure 5(1) Bioclastic and pelloidal grainstone with Vasicekia? sp., Uralinella sp., Radiosphaerella sp., Neoarchaesphaera ellipsoidalis, and Suleimanovella sp., sample POL11a-2. (2) Bioclastic and pelloidal grainstone with Uralinella sp., Parathurammina sp., Salpingothurammina sp., Suleimanovella sp., and ostracodes, sample POL11d. (3) Bioclastic and pelloidal grainstone with Uralinella sp., Parathurammina sp., Neoarchaesphaera ellipsoidalis, and Suleimanovella sp., sample POL11a-7. (4) Three layers of microbialites; two with parathuramminids, sample POL12b. (5) Bioclastic and pelloidal grainstone with Uralinella sp., Parathurammina sp., Bykovaella sp., Suleimanovella sp., and Amphipora sp., sample POL13a. (6) Bioclastic and pelloidal grainstone with Uralinella sp., Parathurammina sp., Bykovaella sp., Suleimanovella sp., and Vasicekia? sp., sample POL13c. Scale bars=1 mm.

Figure 5

Figure 6Superfamilies, families, and genera of the Parathuramminida. 1: Eovolutinidae; 2: Ivanovellidae; 3: Calcisphaeroidea; 4: Tuberitinoidea; 5: Uralinellidae; 6: Parathuramminidae; 7: Parathuramminitidae.

Figure 6

Figure 7Superfamilies, families, and genera of the Irregularinoidea and Caligelloidea. 8: Irregularinoidea; 9: Earlandioidea; 10: Caligelloidea. 11: Tournayellinidae.

Figure 7

Figure 8(1–3, 10, 11, 14, 25) Uralinella antiqua Petrova, 1981: (1) sample POL11-11; (2) sample POL11a-1; (3) sample POL11a-28; (10) sample POL11a-27; (11) sample POL11a-27; (14) sample POL11b-16; (25) sample POL 13b-3. (4?, 7, 8, 13, 16, 18?, 24?) Uralinella sabirovi n. sp.: (4) paratype?, sample POL11a-26; (7) paratype, sample POL11a-5; (8) holotype, sample POL11a-3; (13) paratype, sample POL11b-19c; (16) paratype, sample POL11b-23; (18) paratype?, sample POL13a-2; (24) paratype?, sample POL13b-8. (5, 6, 9, 15, 35) Elenella cf. E. losvica (Petrova, 1981); (5) sample POL11-8; (6) sample POL11a-26a; (9) sample POL11a-14a; (15) sample POL11b-19c; (35) sample POL14-6a. (12?, 17, 19, 20, 21?, 22, 27, 28) Elenella polinikensis n. sp.; (12?) paratype?, sample POL11b-14; (17) paratype, sample POL13a-1a; (18) paratype, sample POL13a-2; (19) paratype, sample POL13a-3; (20) holotype, sample POL13b-4; (21?) paratype?, sample POL 13a-5a (see also the morphotaxon Ratella); (22) paratype, sample POL13a-5; (27) sample POL13b-6; (28) paratype, POL13b-11. (23) Elenella sp. 3, sample POL14-9. (26) Paracaligella ex gr. antropovi Lipina, 1955, sample POL11b-14a. (29) Bithurammina? sp., sample POL14-7. (30) Auroria cf. A. singularis Poyarkov, 1969, sample POL14-17. (31) Auroria cf. A. triangularis Saltovskaya, 1981, sample POL13a-4. (32, 33) Cribrosphaeroides (Parphia) robusta Miklukho-Maklay, 1965; (32) sample POL13a-1; (33) sample POL13b-1. (34) Uslonia cf. U. incomposita (Petrova, 1981), sample POL13b-12. (36) Auroria? sp. Givetian of Mount Polinik (Carnic Alps, Austria); sample POL14-8. Scale bars=0.1 mm.

Figure 8

Figure 9(1, 8) Paracaligella ex gr. antropovi Lipina, 1955: (1) longitudinal section of a tubular chamber resembling Irregularina, sample POL 3-7; (8) more regular longitudinal section, sample POL 11b-25. (2) Earlandia sp. 1, small curved longitudinal section, sample POL11a-30. (3) Neoarchaesphaera? sp., sample POL11a-20. (4, 6, 7, 15, 19, 21–23, 27, 28?) Parathurammina graciosa Pronina, 1960: (4) sample POL11a-24; (6) sample POL3-1a; (7) with Bykovaella breviradiosa (Reitlinger, 1962), sample POL11-2; (15) sample POL11-1; (19) sample POL11-7; (21) sample POL11-9; (22) pseudofibrous, inner layer well visible here, sample POL11a-4; (23) sample POL 11a-10; (27) sample POL11a-14; (28) sample POL11a-39. (5) Earlandia sp. 2. Broader, rectilinear, slightly tapering test, sample POL11a-31. (9) Neoarchaesphaera ellipsoidalis (Poyarkov, 1969), sample POL11a-29. (10) Suleimanovella cf. S. totaensis (Petrova, 1981), sample POL11a-16. (11, 12) Paracaligella sp. 2: (11) sample POL 13b-9; (12) sample POL13b-14. (13, 14, 18) Parathurammina cf. P. uralica Petrova, 1981: (13) sample POL3-1; (14) sample POL3-2; (18) sample POL11b-12a. (16, 17, 24, 25) Bykovaella aperturata (Pronina, 1960) emend. Zadorozhnyi and Yuferev, 1984: (16) sample POL11-3; (17) sample POL11-6; (24) POL11a-12; (25) sample POL11a-6a. (20) ?Bithurammina aff. B. sphaerica Ektova, 1968, sample POL.14-33. (26) Parathurammina arguta Pronina, 1960, sample POL11a-6. Scale bars=0.1 mm.

Figure 9

Figure 10(1, 10) Parathurammina cf. P. uralica Petrova, 1981: (1) sample POL11b-13; (10) sample POL13a-2b. (2) Parathurammina graciosa Pronina, 1960, sample POL11a-21. (3) Bykovaella breviradiosa (Reitlinger, 1962), sample POL11b-19b. (4–8) Bykovaella bykovae (Poyarkov in Purkin et al., 1961): (4) sample POL13a-5; (5) sample POL13a-6; (6) sample POL13a-8; (7) right, with P. arguta (left), sample POL11b-5; (8) sample POL11b-19. (7, 9, 10)Parathurammina arguta Pronina, 1960; (7) (with Bykovaella bykovae), sample POL11-2; (9) sample POL13a-1; (10) sample POL13a-7. (11) Kolongella cf. K. pojarkovi Zadorozhnyi and Yuferev, 1984, sample POL11b-21. (12) Salpingothurammina sp. 1, sample POL13a-3. (13) Ivanovella sp. 1, sample POL11a-9. (14) Ivanovella sp. 2, sample POL11a-10b. (15) Ivanovella sp. 3, sample POL11-5. (16, 17, 22?) Ivanovella reitlingerae n. sp.: (16) holotype, sample POL11a-38; (17) paratype, sample POL11a-40; (22) paratype?, sample POL11a-2. (18, 20, 21) Ivanovella luginensis Zadorozhnyi and Yuferev in Dubatolov, 1981: (18) sample POL11b-18a; (20) sample POL11b-21b; (21) sample POL11a-9a. (19) Ivanovella sp. 4, sample POL11a-8. (23) Salpingothurammina cf. S. kakvensis (Petrova, 1981), sample POL13a-3a. (24) Bithurammina aff. B. sphaerica Ektova, 1968, sample POL11a-34. (25) Suleimanovella sp. 2., sample POL4c. (26, 27) Suleimanovella sp. 3: (26) sample POL11b-12; (27) sample POL13b-10. (28–32) Radiosphaerella poyarkovi n. sp.: (28) holotype, sample POL11b-24; (29) paratype, sample POL11a-25a; (30) paratype, sample POL11a-22; (31) paratype, sample POL11a-17; (32) paratype, sample POL11a-11. (33) Marginara? sp., sample POL14-24. (34) Parathuramminites sp., sample POL14-1. (35, 36) Bykovaella cf. B. macilenta (Pronina, 1970): (35) sample POL14-21; (36) sample POL14-20. (37) Vasicekia? sp., sample POL3-6. Scale bars=0.1 mm.

Figure 10

Figure 11Phylogenetic hypothesis about the most primitive lineages of foraminifers (agglutinated and secreted). Abbreviation: Pennsylvan.=Pennsylvanian.