Sanniopileus stultisissimus, 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 : 44

Sanniopileus stultisissimus n. sp. ( Fig. 23 E-I)

HOLOTYPE. — Photo No. 44785, 44788; stub Mue 22/14; Musée de Géologie , Lausanne, No. 74399 ( Fig. 23E, F ).

ETYMOLOGY. — From the Latin stultisissimus : most mad.

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

DIMENSIONS ( IN µM). — Total length with spines 95- 115 (av. 105), length of cephalothorax 80-140 (av. 105), of cephalis 35, of thorax 30-60 (av. 45), of apical horn 18-26, of ventral and secondary lateral spines 25- 45 (av. 35), of primary lateral spines 35-65 (av. 50), of secondary lateral spines 50; total width with spines 80- 140 (av. 105), width of cephalis 50, of thorax 60-75 (av. 65).

DESCRIPTION

Test short, conical, spiny. Apical, ventral and secondary lateral spines of the initial spicule extended outside test wall into horns directed obliquely upward and laterally. Horns bladed, pointed. The two primary lateral spines directed obliquely downward, bladed and pointed but connected to the thoracic wall on most part of their length. A varying number of accessory spines (four to eight), similar in morphology to the other spines, arise from the thorax at different levels and are directed laterally downward. Cephalis and proximal part of thorax with polygonal (triangular of quadrangular) pores separated by bars. Most part of thorax with rather irregular transverse ridges. One or two rows of triangular or quadrangular pores between ridges. Distal part of thorax wide open.

REMARKS

This species differs from Sanniopileus stultus n. gen., n. sp. by having a number of secondary spines arising from about two or more levels of the thorax with angles equal to the primary lateral spines. Secondary spines arising from a proximal level resemble the primary lateral spines in length and angles, those arising from a distal level are shorter.

Figures

FIG. 23. — A-D, J, Sanniopileus stultus n. gen., n. sp.; A, B, holotype, right lateral and apical views showing the absence of dorsal spine; C, D, J, paratypes; C, D, ventral and left lateral views; J, basal view of initial spicule showing the absence of dorsal spine; E-I, Sanniopileus stultisissimus n. gen., n. sp.; E, F, holotype, left lateral and basal views; G-I, paratypes; G, I, left lateral and basal views with details of the initial spicule; H, ventral view. Scale bars: A-H, 30 µm; I, J, 10 µm.