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Text-fig. 6. Molars of Microtus from Mikhailovka-5. Microtus ex gr. agrestis LINNAEUS, 1761: a–l: M2, m–s: M3; Microtus (Terricola) ex gr. subterraneus (SELYS-LONGCHAMPS, 1836): t–z: m1, aa–ab: m2, ac–ag: M3. in Late Pleistocene (Eemian) Mollusk And Small Mammal Fauna From Mikhailovka-5 (Kursk Oblast, Central Russia)

Text-fig. 6. Molars of Microtus from Mikhailovka-5. Microtus ex gr. agrestis LINNAEUS, 1761: a–l: M2, m–s: M3; Microtus (Terricola) ex gr. subterraneus (SELYS-LONGCHAMPS, 1836): t–z: m1, aa–ab: m2, ac–ag: M3.

Text-fig. 2. Map of the Mikhailovka quarry. 1 – wall of the quarry, 2 – roads, 3 – position and number of sections. in Late Pleistocene (Eemian) Mollusk And Small Mammal Fauna From Mikhailovka-5 (Kursk Oblast, Central Russia)

Text-fig. 2. Map of the Mikhailovka quarry. 1 – wall of the quarry, 2 – roads, 3 – position and number of sections.

Text-fig. 1. Geographic setting of the locality Mikhailovka-5. a: map of the Russian Plain, b: map of the central part of the Russian Plain. in Late Pleistocene (Eemian) Mollusk And Small Mammal Fauna From Mikhailovka-5 (Kursk Oblast, Central Russia)

Text-fig. 1. Geographic setting of the locality Mikhailovka-5. a: map of the Russian Plain, b: map of the central part of the Russian Plain.

Text-fig. 5. Molars of Microtus ex gr. agrestis LINNAEUS, 1761 from Mikhailovka-5. a–l: m1, m–r: M1. in Late Pleistocene (Eemian) Mollusk And Small Mammal Fauna From Mikhailovka-5 (Kursk Oblast, Central Russia)

Text-fig. 5. Molars of Microtus ex gr. agrestis LINNAEUS, 1761 from Mikhailovka-5. a–l: m1, m–r: M1.

Text-fig. 4. Stratigraphic correlation of the five major fossil-bearing localities in the Mikhailovka quarry near Zheleznogorsk. 1 – loesses and soils, 2 – unlaminated loams, 3 – laminated loams, 4 – clays, 5 – sands, 6 – gravels, 7 – carbonate concretions, 8 – mollusk shells, 9 – small mammal remains, 10 – insect remains, 11 – plant macroremains. in Late Pleistocene (Eemian) Mollusk And Small Mammal Fauna From Mikhailovka-5 (Kursk Oblast, Central Russia)

Text-fig. 4. Stratigraphic correlation of the five major fossil-bearing localities in the Mikhailovka quarry near Zheleznogorsk. 1 – loesses and soils, 2 – unlaminated loams, 3 – laminated loams, 4 – clays, 5 – sands, 6 – gravels, 7 – carbonate concretions, 8 – mollusk shells, 9 – small mammal remains, 10 – insect remains, 11 – plant macroremains.

Text-fig. 8. Upper molars of Arvicola ex gr. sapidus MILLER, 1908 from Mikhailovka-5. a–d: M1, e–h: M2, i–q: M3. in Late Pleistocene (Eemian) Mollusk And Small Mammal Fauna From Mikhailovka-5 (Kursk Oblast, Central Russia)

Text-fig. 8. Upper molars of Arvicola ex gr. sapidus MILLER, 1908 from Mikhailovka-5. a–d: M1, e–h: M2, i–q: M3.

Text-fig. 3. Correlation of geological sections with Pleistocene deposits of the Mikhailovka quarry near Zheleznogorsk. 1 – modern and fossil soils, 2 – loess-like loam, 3 – sandy clay, 4 – aleurites, 5 – horizontally laminated clays, 6 – brown loams, 7 – blue clays and loams, 8 – sands, 9 – gravels, 10 – mollusk shells, 11 – small mammal remains. in Late Pleistocene (Eemian) Mollusk And Small Mammal Fauna From Mikhailovka-5 (Kursk Oblast, Central Russia)

Text-fig. 3. Correlation of geological sections with Pleistocene deposits of the Mikhailovka quarry near Zheleznogorsk. 1 – modern and fossil soils, 2 – loess-like loam, 3 – sandy clay, 4 – aleurites, 5 – horizontally laminated clays, 6 – brown loams, 7 – blue clays and loams, 8 – sands, 9 – gravels, 10 – mollusk shells, 11 – small mammal remains.

Text-fig. 7. Lower molars of Arvicola ex gr. sapidus MILLER, 1908 from Mikhailovka-5. a–g: m1, h–j: m2, k–m: m3. in Late Pleistocene (Eemian) Mollusk And Small Mammal Fauna From Mikhailovka-5 (Kursk Oblast, Central Russia)

Text-fig. 7. Lower molars of Arvicola ex gr. sapidus MILLER, 1908 from Mikhailovka-5. a–g: m1, h–j: m2, k–m: m3.

Text-fig. 9. Enamel differentiation index (SDQ) of Likhvinian (1, 2) and Mikulinian (3, 4) samples of Arvicola from the Russian Plain. in Late Pleistocene (Eemian) Mollusk And Small Mammal Fauna From Mikhailovka-5 (Kursk Oblast, Central Russia)

Text-fig. 9. Enamel differentiation index (SDQ) of Likhvinian (1, 2) and Mikulinian (3, 4) samples of Arvicola from the Russian Plain.

FIG. 6. — Octoberaspis ushakovi n. gen., n in Arthropods from the Lower Devonian Severnaya Zemlya Formation of October Revolution Island (Russia)

FIG. 6. — Octoberaspis ushakovi n. gen., n. sp.; A, No. 35/324, 34 × 13 mm; B, Nos. 35/336 (holotype) (above), 24 × 14 mm, and 35/337 (below), 18 × 12 mm; C, No. 35/711, 33 × 9 mm; D, No. 35/712, total length 30 mm.

FIG. 13. — Elymocaris urvantsevi n in Arthropods from the Lower Devonian Severnaya Zemlya Formation of October Revolution Island (Russia)

FIG. 13. — Elymocaris urvantsevi n. sp.; A, No. 35/375, maximum length 23 mm; B, 35/782, maximum length 33 mm; C, 35/781, maximum preserved length 30 mm; D, No. 35/378, maximum preserved length 31 mm; E, No. 35/779, maximum preserved carapace length 25 mm, maximum carapace width 14 mm.

FIG. 8. — A-C, E-G, Octoberaspis ushakovi n. gen., n in Arthropods from the Lower Devonian Severnaya Zemlya Formation of October Revolution Island (Russia)

FIG. 8. — A-C, E-G, Octoberaspis ushakovi n. gen., n. sp.; A, No. 35/735, 27 × 12 mm; B, No. 35/707, 26 × 12 mm; C, No. 35/339, 20 × 12 mm; E, No. 35/379, 27 × 12 mm; F, No. 35/713 (juvenile), 11 × 4 mm; G, No. 35/719 (juvenile), 8 × 3.5 mm; D, Chasmataspida incertae sedis, No. 35/174, 29 × 12 mm.

FIG. 2. — Paraduslia talimaae n. gen., n in Arthropods from the Lower Devonian Severnaya Zemlya Formation of October Revolution Island (Russia)

FIG. 2. — Paraduslia talimaae n. gen., n. sp., interpretative drawings of the specimens shown in Fig. 1; A, No. 35/700 (holotype); B, No. 35/702. Abbreviations: an, bases of antennae; fu, furca; ma, median axis of opisthosoma; sp, spines, probably lamellar spines; tg, tergite. Scale bars: 5 mm.

FIG. 15 in Arthropods from the Lower Devonian Severnaya Zemlya Formation of October Revolution Island (Russia)

FIG. 15. — Reconstruction of Elymocaris urvantsevi n. sp. in lateral view. Appendages reconstructed by comparison to other phyllocarids. Scale bar: 5 mm.

FIG. 5 in Arthropods from the Lower Devonian Severnaya Zemlya Formation of October Revolution Island (Russia)

FIG. 5. — Reconstruction of the dorsal surface of Paraduslia talimaae n. gen., n. sp. Scale bar: 5 mm.

FIG. 14. — Elymocaris urvantsevi n in Arthropods from the Lower Devonian Severnaya Zemlya Formation of October Revolution Island (Russia)

FIG. 14. — Elymocaris urvantsevi n. sp., interpretative drawings of the specimens shown in Fig. 13; A, No. 35/375; B, 35/782; C, 35/781; D, No. 35/378; E, No. 35/779. Abbreviations: ab, abdomen; at, anterior tubercle; cp, carapace pleural fold; gt, possible gut trace; fu, furca; mdp, median dorsal plate; rp, rostral plate; st, striae; tl, telson; abdominal segments numbered (note longer segment 7). Scale bars: 5 mm.

FIG. 4. — Paraduslia talimaae n. gen., n in Arthropods from the Lower Devonian Severnaya Zemlya Formation of October Revolution Island (Russia)

FIG. 4. — Paraduslia talimaae n. gen., n. sp., interpretative drawings of the specimens shown in Fig. 3; A, No. 35/701; B, No. 35/703. Abbreviations: cp, carapace (note raised, diamond-shaped central area); ma, median axis of opisthosoma; sp, spines, probably lamellar spines from appendages. Scale bar: 5 mm.

FIG. 7. — Octoberaspis ushakovi n. gen., n in Arthropods from the Lower Devonian Severnaya Zemlya Formation of October Revolution Island (Russia)

FIG. 7. — Octoberaspis ushakovi n. gen., n. sp., interpretative drawings of the specimens shown in Fig. 6; A, No. 35/324; B, Nos. 35/336 (holotype) (above) and 35/337 (below); C, No. 35/711; D, No. 35/712. Abbreviations: ap, prosomal appendage; cp, carapace; cr, marginal carapace rim; ep, epimera of pretelsonic segment; ga, genital appendage; gs, genal spine; le, lateral eye tubercle; me, median eye tubercle; ms, metastoma; op, opisthosomal operculae; pra, preabdomen; poa, postabdomen; tb, preabdominal tuberculation; tl, telson, opisthosomal segments numbered. Scale bar: 5 mm.

FIG. 10 in Arthropods from the Lower Devonian Severnaya Zemlya Formation of October Revolution Island (Russia)

FIG. 10. — Reconstruction of Octoberaspis ushakovi n. gen., n. sp. in both dorsal and ventral view. Chelicerae and leg coxae hypo- thetical, based on comparisons with eurypterids and xiphosurans. Scale bar: 5 mm.

FIG. 1. — Paraduslia talimaae n. gen., n in Arthropods from the Lower Devonian Severnaya Zemlya Formation of October Revolution Island (Russia)

FIG. 1. — Paraduslia talimaae n. gen., n. sp.; A, No. 35/700 (holotype), 29 × 16 mm; B, No. 35/702, 33 × 15 mm.