Saitoum curtipes, 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

Saitoum curtipes n. sp. ( Fig. 14 H-J)

HOLOTYPE. — Photo No. 58491; stub Mue 22/21; Musée de Géologie , Lausanne, No. 74381 ( Fig. 14H ). ETYMOLOGY. — From the Latin curtus: short; and pes: foot.

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

DIMENSIONS ( IN µM). — Length of cephalis 70-78 (av. 73), of feet 30-45 (av. 35), of apical horn 31-37 (av. 35), width of cephalis 75-95 (av. 80).

DESCRIPTION

Cephalis very small, subspherical, with very slen- der apical horn and feet. Cephalic wall with sparse circular or elliptical pores, each pore with a protruding rim. Ditreme present. Apical horn, slender, needle-like, three-bladed proximally, half as long as diametre of cephalis. Feet slender, strongly divergent and curved downwards. They are practically bladeless but some specimens show very low blades or a triangular cross section proximally. Lower border of cephalis with a thin rim. Axobate short.

REMARKS

S. curtipes n. sp. resembles S. labeosum n. sp. in having a subglobular cephalis with the same system of pores with protruding rims, but differs from this species by being less robust, by having apical horn and feet slender and the latter strongly divergent and curved. It is morphologically closed to S. reticulatum n. sp. from which it differs by having shorter and slender feet and rims of pores not connected to form a reticulum.

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.