Saitoum differtum, Dumitrica & Zügel, 2003

Dumitrica, Paulian & Zügel, Peter, 2003, Lower Tithonian mono- and dicyrtid Nassellaria (Radiolaria) from the Solnhofen area (southern Germany), Geodiversitas 25 (1), pp. 5-72 : 24-26

Saitoum differtum n. sp. ( Fig. 15 A-C)

HOLOTYPE. — Photo No. 58465, 58466; stub Mue 22/21; Musée de Géologie , Lausanne, No. 74382 ( Fig. 15A, B ). ETYMOLOGY. — From the Latin differtus : full.

MATERIAL EXAMINED. — Two illustrated specimens from the type horizon (sample Mue 22).

DIMENSIONS ( IN MM). — Length of cephalis 50-60, of feet 30-35, of horn 25-30, width of cephalis 60-65.

DESCRIPTION

Cephalis globular, thick-walled with very small pores and surface covered by a pustulate layer. Apical horn stout, about as long as half the width of the cephalis, three-bladed, pointed, with thick blades. Ventral spine extremely short. Arch AV probably present, not visible from outside. Feet strongly divergent, stout, pointed, slightly curved. They are approximately as long as the apical horn, three-bladed, with thick blades and narrow grooves. Velum short, only partly preserved.

REMARKS

Saitoum differtus n. sp. differs from the other species of the genus by short, stout, and strongly divergent feet, and the cephalic wall covered by a pustulate layer.

Figures

FIG. 15. — A-C, Saitoum differtum n. sp.; A, B, holotype, right lateral and basal views; C, paratype, left lateral view; D, E, N, Saitoum kapewinteri n. sp.; D, N, holotype; D, view from the left primary lateral spine; N, detail, ventral view; E, paratype, ventral view; F-I, L, Saitoum labeosum n. sp.; F, holotype, dorsal view; G-I, L, paratypes; G, ventral view showing the ditreme; H, broken specimen, right lateral view showing the thin apical spine and thick median bar; I, specimen with distally closed velum; L, basal view showing the left secondary lateral spine prolonged outside (anomaly?); J, K, M, Saitoum macilentum n. sp.; J, M, holotype, dorsal and basal views; K, paratype, left lateral view showing a strong arch Al. Abbreviations: A, apical spine; l, secondary lateral spine. Scale bars: 30 µm.