Mennerius morosus Luljeva, 1967

Ovechkina, Maria N., Jordan, Richard W. & Mostovski, Mike B., 2017, On the validity, synonymy and distribution of some Lapideacassaceae (Haptophyta), Phytotaxa 308 (1), pp. 111-111 : 111

Mennerius morosus Luljeva, 1967 emend. ( Figure 1B )

Mennerius morosus Luljeva, 1967: 97 , pl. IV, figs 49, 49a; Loeblich & Tappan 1969: 577; Luljeva & Permyakov 1980: 55. Holotype:—L-1725/17 (IGS, designated by Luljeva (1967)), Turonian; Veliki Budischa [49.86°N 34.58°E], Poltava Region, Ukraine.

Description:—Proximal tier very short or absent. First distal tier consists of thick elements and builds parallel-sided body. No second distal tier. Body as high as wide, or shorter. Apical cone dome-shaped, apparently no central apical process(es).

Note:— Mennerius morosus resembles M. glans ( Black, 1971) as illustrated by Bown (2005: 82, pl. P13, fig. 7) or M. mariae ( Black, 1971) ( Bown 2005: 82, pl. P13, fig. 8). However, a synonymy of either of these species with M. morosus cannot be drawn until further material from the M. morosus type area/strata is available.

Figures

FIGURE 1. Some Late Cretaceous representatives of the genus Mennerius. A. M. longus, Turonian, Ukraine; 48a, holotype. B. M. morosus, Turonian, Ukraine; 49a, holotype. C. Mennerius sp. A cf. M. bispinosus, Campanian, Ukraine. D. Mennerius sp. B cf. M. bispinosus, Lower Maastrichtian, Russia. E. M. cornutus, Lower Maastrichtian, Russia. F. Mennerius sp. A., Cenomanian, Israel. Scale bars 5 μm. (Figures 1A, 1B after Luljeva (1967); Figure 1C after Matveev (2015); Figures 1D–F, crossed nicols)