Please be patient with this page loading, there are a lot of image files. A strew slide from Carlovo, Russia (also seen spelt as Carlova, Sharlovo etc). Great range of species present. Mounted in Styrax and dated 28/11/[19]66. Prepared by CN Walter. Olympus BHB microscope using 450nm LED light. Individual diatoms imaged using a 63x Leitz Pl Apo 1.4 objective, oil immersion. Olympus Aplanat Achromat condenser, oil immersion, oblique lighting. 2.5x Nikon CF PL photoeyepiece. Monochrome converted Nikon d850 camera. Image stacks prepared in Zerene (Pmax). I’m fairly sure with all these ID’s however if there are any issues please let me know and I will update them.
Trinacria coronata. 40 images stacked. Underside view, rim upwards. Trinacria coronata O.Witt 1886 ‘1885’. Published in: Witt, O.N. (1886 ‘1885’). Ueber den Polierschiefer von Archangelsk-Kurojedowo im Gouv. Simbirsk. Verhandlungen der Russisch-kaiserlichen Mineralogischen Gesellschaft zu St. Petersburg, Series II 22: 137-177, pls. VI-XII. Page 171, Plate X, Figures 5,8.
Probably Rattrayella simbirskiana (Grunow) P.A. Sims, although quite a small one. 44 images stacked. Underside view, rim upwards. Rattrayella simbirskiana (Grunow) Hanna 1934: 335. Published in: Hanna, G.D. (1934). Additional notes on diatoms from the Cretaceous of California. Journal of Paleontology 8: 352-355. Page 335. Also see: Sims, P.A. (2006). A revision of the genus Rattrayella De-Toni including a discussion on related genera. Diatom Research 21(1): 125-158. Page 136, Figures 53-63.
Sheshukovia duplicata (A.W.F.Schmidt) Z.I.Glezer 1984. 23 images stacked. Published in: Glezer, Z.I. (1984). Znachenie issledovanij po sistematike diatomovych vodoroslej dlia biostrtigrafii i paleogeographii [The importance of research about systematics of diatom algae for biostratigraphy and paleogeography]. Ezhegodnik Vsesoyuznogo Paleontologicheskogo Obshchestva 27: 284-298, 1 figure, 1 table. [in Russian] Page 293. This name is currently regarded as a synonym of Medlinia duplicata (A.W.F.Schmidt) P.A.Sims 1998. Published in: Sims, P.A. (1998). The early history of the Biddulphiales. I. The genus Medlinia gen. nov. Diatom Research 13(2): 337-374, 86 figs. Page 363. Basionym: Triceratium duplicatum A.W.F.Schmidt 1882. Published in: Schmidt, A.[W.F.] (1882). Atlas der Diatomaceen-kunde Series II: Heft 19. pp. pls 73-76. Aschersleben: Ernst Schlegel’s Verlag. Plate 77, Figures 10-13.
Paralia siberica (A.W.F.Schmidt) R.M.Crawford & P.A.Sims 1990. 15 images stacked. Published in: Crawford, R.M., Sims, P.A. & Hajos, M. (1990). The morphology and taxonomy of the centric diatom genus Paralia 1. Paralia siberica comb. nov.. Diatom Research 5(2): 241-252.
Aulacodiscus septus. 30 images stacked. Fragment. For more information see Strelnikova, N. I., Fourtanier, E., & Kociolek, J. P. (2004). Morphological studies of Aulacodiscus species from the “Russian collection” of the California Academy of Sciences. Diatom Research, 19(2), 283–310. https://doi.org/10.1080/0269249X.2004.9705876.
Aulacodiscus simulans. 92 images stacked. Quite ‘dome’ shaped (big stack). Original description: Barker, J.W. & Meakin, S.H. (1946). New and rare diatoms. Journal of the Quekett Microscopical Club, Series 4, 2(2): 76-79, pls 15, 16. Page 76, Plate 15, Figure 2. Also see: Strelnikova, N.I., Fourtanier, E. & Kociolek, J.P. (2004). Morphological studies of Aulacodiscus species from the “Russian Collection” of the California Academy of Sciences. Diatom Research 19(2): 283-310. Pages 291-294, Figures 31-38, 96-99, 113. Quote “Known only from ‘Carlovo’.“.
Rhaphoneis fuchsii Pantocsek, 1889. 31 images stacked. Underside view, rim upwards. Original description: Pantocsek, J. (1889). Beiträge zur Kenntnis der Fossilen Bacillarien Ungarns. Teil II. Brackwasser Bacillarien. Anhang: Analyse de marine Depots von Bory, Bremia, Nagy-Kurtos in Ungarn; Ananio und Kusnetzk in Russland. Nagy-Tapolcsány, Buchdrucherei von Julius Platzko, 123 pp., 30 pls. Page 63, Plate 17, Figure 284. Synonymised names: Nematoplata fuchsii (Pantocsek) Kuntze, 1898, Surirella fuchsii (Pantocsek) Thum Slides.
Stellarima microtrias (Ehrenberg) G.R.Hasle & P.A.Sims 1986. 90 images stacked. Published in: Hasle, G.R. & Sims, P.A. (1986). The diatom genus Coscinodiscus Ehrenb.: C. argus Ehrenb. and C. radiatus Ehrenb.. Botanica Marina 29: 305-318. Page 111, Figures 18-27. Also known as Symbolophora microtrias.
Hemiaulus sp. (maybe H. elegans). 72 images stacked. Fragment, missing the ends.
Parodontella ruthenica (Witt) D M.Williams & P.A.Sims in Sims et al., 2018. See: Sims, P.A., Williams, D.M. & Ashworth, M. (2018), Examination of type specimens for the genera Odontella and Zygoceros (Bacillariophyceae) with evidence for the new family Odontellaceae and a description of three new genera. Phytotaxa 382 (1): 1–56. https://doi.org/10.11646/phytotaxa.382.1.1.
This was a fun slide and a great example of a strew with loads to image.
Some information about Carlovo. ‘The material from “Carlovo” (CAS 612238; CAS slides 581081 to 581084) was apparently sent to CAS by E. Cheneviere and cleaned by A.L. Brigger. There is no information about its exact locality. We suppose that it could be the “Sharlovo” outcrop in the vicinity of the city of Insa, 0.5 km southwest of the railway station Sharlovo (Uljanovskaya District). The species composition indicates that this sample belongs to the lower Paleocene Hemiaulus rossicus-Trinacria heibergiana Diatom Zone (stratigraphic scheme of Strelnikova 1988, 1992). From “Strelnikova, N.I., Fourtanier, E. & Kociolek, J.P. (2004). Morphological studies of Aulacodiscus species from the “Russian Collection” of the California Academy of Sciences. Diatom Research 19(2): 283-310.”.’.