. Cryptogamic plants of the USSR. (Flora sporovykh rastenii SSSR). Plants. Gleser, varieties of D. rotundata Jouse, D. trans it oria Defl., Mesocena elliptica Ehr. emend. Defl. D. spinosa Defl. and Naviculopsis b i ap i c ul a t a occur in considerable amounts, but show a more limited distribution. Among the rare forms here are Dictyocha deflandrei var. completa Gleser f. completa, D. fibula Ehr. var. fibula f. fibula, D. obliqua Gleser, varieties ofD. triacantha Ehr. and D i s t e p h a nu s speculum var. penta- gonus Lemm. Nearly all forms in the southern part of the Taz peninsula show a gre
. Cryptogamic plants of the USSR. (Flora sporovykh rastenii SSSR). Plants. Gleser, varieties of D. rotundata Jouse, D. trans it oria Defl., Mesocena elliptica Ehr. emend. Defl. D. spinosa Defl. and Naviculopsis b i ap i c ul a t a occur in considerable amounts, but show a more limited distribution. Among the rare forms here are Dictyocha deflandrei var. completa Gleser f. completa, D. fibula Ehr. var. fibula f. fibula, D. obliqua Gleser, varieties ofD. triacantha Ehr. and D i s t e p h a nu s speculum var. penta- gonus Lemm. Nearly all forms in the southern part of the Taz peninsula show a greater density than those in the basin of the Pelym River. This may be due partly to the larger amount of material examined from the former FIGURE 11. Characteristic silicoflagellate complex of the Early Oligocene (?) of the West Siberian plain; 1, 3—Dictyocha elata var. media Gleser f. media; 2—D. e. var. media f. reducta Gleser; 4, 5 —D istephan us antiquus Gleser; 6—Dictyocha spinosa (Defl.) Gleser; 7, 9—Mesocena elliptica Ehr. emend. Def.; 8, 10 —Dictyocha r ot und a ta Jouse var. r ot und at a ; 11 — 13, 15— var. secta Gleser; 14 —Naviculopsis biapiculata var. minor (Schulz) Gleser. The characteristic silicoflagellate complex of the Early Oligocene (? of the West Siberian plain consists of the following species, varieties and forms (Figure 11): Dictyocha elata var. media Gleser f. media D. e. var. media f. reducta Gleser D. rotundata Jouse var. rotundata D. r. var. secta Gleser D. spinosa (Defl.) Gleser Naviculopsis biapiculata var. minor (Schulz) Gleser Distephanus antiquus Gleser Mesocena elliptica Ehr. emend. Defl. 201. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Botanicheskii institut im. V. L. Komarova. Jerusalem [Published for the National Science Foundation, Washing
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Keywords: ., bookcentury1900, bookcollectionbiodiversity, booksubjectplants
