Saitulpus neojurassicus, 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 : 31

Saitulpus neojurassicus n. sp. ( Fig. 16K, L )

HOLOTYPE. — Photo No. 60056; stub Mue 22/23; Musée de Géologie , Lausanne, No. 74389 ( Fig. 16K ). ETYMOLOGY. — From its occurrence in the Upper Jurassic.

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

DIMENSIONS ( IN µM). — Length of cephalis 45, of feet 45-50, of apical horn 50, of spines on feet 8-14, width of cephalis 40-60.

DESCRIPTION

Cephalis highly globular, raised dorsally toward the apical horn. Apical horn long, three-bladed, with a distal verticil of three short spines, and an axial pointed spine. Arch AV probably present. Ventral spine very short, three-bladed, pyramidal. Pores polygonal, irregular in size and arrangement, separated by narrow intervening bars. Feet strongly divergent, three-bladed, slightly torsioned in clockwise direction and bearing a distal verticil of short spines directed obliquely. Beyond the verticil feet terminate in a pointed axial spine which is slightly three-bladed.

REMARKS

The morphology of this species is rather similar to that of some Middle Triassic species of the genus Baratuna ( Dumitrica 1991) .

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.