Saitoum, Pessagno, 1977

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

Saitoum (?) delicatum n. sp. ( Fig. 14 K-M)

HOLOTYPE. — Photo No. 58450; stub Mue 22/21; Musée de Géologie , Lausanne, No. 74382 ( Fig. 14K ). ETYMOLOGY. — From the Latin delicatus: fine.

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

DIMENSIONS ( IN µM). — Length of cephalis 40-50 (av. 45), of feet 35-45 (av. 40), of apical horn 34-41 (av. 53), width of cephalis 45-60 (av. 55).

DESCRIPTION

Cephalis very small, globular with slender, cylindrical apical horn and feet. Initial skeleton with arch AV well marked by a constriction. Arches Al less marked. Cephalic wall thick with rounded pores of various size. Thin-walled specimens with larger pores, thick-walled specimens with small pores due to a superimposed deposition of silica. Apical horn straight, long, gently tapering. Feet straight, long, strongly divergent. Ventral spine very short, three-bladed, pyramidal. Thick-walled specimens with remains of a very delicate velum.

REMARKS

The species is questionably assigned to Saitoum because of the constriction along the arch AV. Although it has cylindrical apical horn and feet S.(?) delicatum n. sp. does not seem to be closely related to S. curtipes n. sp., S. elegans De Wever, 1981 , or S. labeosum n. sp.

Figures

FIG. 14. — A-D, Saitoum ambiguum n. sp.; A, B, holotype, latero-ventral and basal views respectively; C, D, paratype, dorsal and basal views showing the two secondary lateral spines extended outside wall; E-G, Saitoum bicorniculatum n. sp.; E, F, holotype, right lateral and basal views showing the long ventral spine and the dorsally displaced apical horn; G, paratype, left lateral view; H-J, Saitoum curtipes n. sp.; H, holotype, ventral view; I, J, paratypes; I, specimen with remnants of velum; J, basal view; K-M, Saitoum(?) delicatum n. sp.; K, holotype, ventral view showing a constriction along arch AV; L, M, paratypes; L, basal view showing remnants of velum; M, right lateral view showing a constriction along arch Al. Abbreviations: A, apical spine; l, secondary lateral spine; V, ventral spine. Scale bars: 30 µm.