Menispermites lebedevii Moiseeva

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 : 10

Menispermites lebedevii Moiseeva

Figure 4D

2014 Menispermites lebedevii Moiseeva , p. 681, pl. 15, figure 1–5, 9.

Holotype. Specimen GIN 3392/68, North-East of Russia, Enmyvaam River , Emuneret Formation, Santonian –Campanian; Moiseeva, 2014, pl. 15, fig. 1, 5, text-figure 3b.

Diagnosis ( Moiseeva, 2014). Leaves entire, rounded or ovate, slightly asymmetric; leaf base peltate eccentric; leaf apex rounded; margin irregularly dentate, partly undulate; teeth usually flat, rounded-triangular with rounded or more rarely acute apex; venation palmate, craspedodromous or semicraspedodromous, with 7–9 basal veins decreasing downwards; midrib prominent, with 2– 3 pairs of secondary veins; lower basal veins thin and short, running to base of leaf lamina into pelta. Range and occurrence. North-East of Russia, Emuneret Formation, Santonian–Campanian.

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.