Menispermites minutus (Kryshtofovich) Shczepetov, Herman et Belaya

Zolina, A. A., Golovneva, L. B. & Abstract, A. A. Grabovskiy, 2024, The morphological diversity and distribution of the genus Menispermites (Magnoliopsida) in the Cretaceous of Northern Asia, Palaeontologia Electronica (a 9) 28 (1), pp. 1-19 : 6

Menispermites minutus (Kryshtofovich) Shczepetov, Herman et Belaya

Figure 4G , Figure 5D, F

1958 Menispermites septentrionalis auct. non Hollick; Kryshtofovich, p. 53, pl. 11, figure 2, 3.

1958 Populus minuta Kryshtofovich , p. 42, text-figure 19.

1992 Menispermites ex gr. septentrionalis Hollick ; Shczepetov et al., pl. 41, figure 2, pl. 42, figure 1, pl. 44, figure 1, pl. 49, figure 1, pl. 50, figure 3, 4, pl. 59, figure 4, 5.

1992 Menispermites minutus (Kryshtofovich) Shczepetov, Herman et Belaya , p. 44, pl. 41, figure 6.

1993 Menispermites septentrionalis auct. non Hollick; Philippova and Abramova, pl. 31, figure 1–3. 2015 Menispermites minutus Golovneva et al. , p. 431, pl. 7, figure 1–7, pl. 8, figure 1–3.

Neotype (designated by Golovneva et al., 2015).

Specimen NEISRI PF1/688a, North-East of Russia, Anadyr River basin, Grebenka River, Krivorechenskaya Formation, upper Albian–lower

Turonian; Golovneva et al., 2015, pl. 7, figure 4.

Emended diagnosis (Golovneva et al., 2015).

Leaves entire, broadly ovate, sometimes with lobe-like extensions in upper part, with cordate,

rounded or truncate base and broadly triangular obtuse or attenuate apex; margin dentate; teeth broadly triangular, with concave sides, an acute apex with glands and wide low sinuses; venation palmate, craspedodromous, with 7–9 basal veins;

midvein straight with 2–3 pairs of secondary branches in upper part; other basal veins curved,

decreasing downwards, with 2–3 basi- and 1–3

acroscopic branches or dichotomizing 1–3 times.

Range and occurrence. North-East of Russia,

Krivorechenskaya Formation, upper Albian–lower

Turonian.

Figures

FIGURE 4. Morphological diversity of the genus Menispermites in Northern Asia: A –M. obtusilobus Lesquereux (after Lesquereux, 1874, pl. 25, figure 1); B – M. septentrionalis Hollick (after Hollick, 1930, pl. 42, figure 4); C – M. ginterensis Herman, GIN 3385/203 (after Herman, 1988, text-figure 2); D – M. lebedevii Moiseeva, spec. GIN 3392/ 68, holotype (after Moiseeva, 2014); E – M. sibiricus (Heer) Golovneva, spec. IUT 243; F – М. favosus Krassilov, spec. FSCEATB 330/377, holotype; G – M. minutus (Kryshtofovich) Shczepetov, Herman et Belaya, spec. NEISRI PF1/688a, neotype; H – Menispermites sp., spec. GIN 3385/85, (after Moiseeva and Sokolova, 2007, figure 6i); I – M. marcovoensis Philippova, spec. TFGI 622/3, holotype; J – М. sachalinensis Kryshtofovich ex Zhilin, spec. TSNIGRM 6256/149, lectotype; K – M. vasetskii Philippova (after Philippova and Abramova, 1993, pl. 107, figure 1); L – M. orientalis Golovneva, spec. NEISRI PF1/505, holotype. Scale bar is 1 cm.

FIGURE 5. Species of the genus Menispermites from Northern Asia: A, B – М. favosus Krassilov, Boshnyakovo Formation, Maastrichtian-Danian: A – spec. GIN 58/33; B – spec. GIN 58/53a; C – М. sachalinensis Kryshtofovich ex Zhilin, spec. TSNIGRM 6256/149, lectotype, Zhonk'er Formation, Campanian; D, F – M. minutus (Kryshtofovich) Shczepetov, Herman et Belaya, Krivorechenskaya Formation, upper Albian-lower Turonian: D – spec. TFGI 223/ 1; F – spec. NEISRI PF1/688a, neotype; E – M. marcovoensis Philippova, spec. TFGI 622/3; G, H – M. orientalis Golovneva: G – spec. TFGI 622/13, Krivorechenskaya Formation, upper Albian-lower Turonian; H – spec. TFGI 403/1, Poperechnenskaya Formation, Coniacian. Scale bar is 1 cm.