Saitoum virgulispina, 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 : 30

Saitoum virgulispina n. sp. ( Fig. 16 F-H)

HOLOTYPE. — Photo No. 60015-60017; stub Mue 22/23; Musée de Géologie , Lausanne, No. 74388 ( Fig. 16 F-H).

ETYMOLOGY. — From the Latin virgula: thin rod; and spina: spine.

MATERIAL EXAMINED. — One specimen from the type horizon (sample Mue 22).

DIMENSIONS ( IN µM). — Length of cephalis 65, of apical horn 40, width of cephalis 70.

DESCRIPTION

Cephalis globular, thin-walled, smooth-surfaced, with circular or subcircular pores of various size; some pores rather wide, others very small. All pores with slightly protruding rim. Apical horn long, slender, needle-like with circular cross section. Axobate present, short. Arches Al and AV rather well marked. Ditreme present on both sides of ventral and secondary lateral spines. Feet moderately long, straight, strongly divergent, three-bladed, and pointed.

REMARKS

Although we have only a single specimen of this species it is very different from the other species so far described to be considered a new species. Its cephalis with rather wide pores with protruding rims and straight divergent feet makes it close to Poulpus oculatus De Wever, 1982 , but this species has a long three-bladed apical horn.

Figures

FIG. 16. — A, B, Saitoum pagei Pessagno, 1977; A, dorsal view showing slight constrictions along arches Al; B, right lateral view showing remnants of velum; C, D, Saitoum reticulatum n. sp.; C, holotype, left lateral view showing remnants of velum; D, paratype, right lateral view; E, Saitoum sp. aff. S. reticulatum n. sp., right lateral view; F-H, Saitoum virgulispina n. sp., holotype, right lateral, ventral, and basal views respectively; I, J, Saitoum sp. A, right lateral and basal views; K, L, Saitulpus neojurassicus n. gen., n. sp.; K, holotype, left lateral view; L, paratype, dorsal view. Abbreviations: A, apical spine; l, secondary lateral spine. Scale bars: 30 µm.