Napora modesta, 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 : 62

Napora modesta n. sp. ( Fig. 29 E-G)

HOLOTYPE. — Photo No. 58514; stub Mue 22/21; Musée de Géologie , Lausanne, No. 74417 ( Fig. 29E ) . PARATYPES. — MNHN, bât. de Géologie, No. Gg 2001/2098-2099.

ETYMOLOGY. — From the Latin modestus: modest.

MATERIAL EXAMINED. — 12 specimens from the type horizon (sample Mue 22).

DIMENSIONS ( IN µM). — Total length 130-185 (av. 160), length of apical horn 30-50 (av. 40), of cephalis 20-25 (av. 22), of thorax 30-45 (av. 35), of feet 50-75 (av. 60), total width 80-145 (av. 115), width of cephalis 20-35 (av. 30), of thorax 60-90 (av. 75).

DESCRIPTION

Cephalis relatively large, hemispherical, entirely perforate, with small, usually quadrangular pores arranged in oblique rows. Apical horn slender, distinctly three-bladed, with a distinct verticil in the middle part giving rise to three well developed spines arising almost perpendicularly to the axis of the apical horn. Thorax broadly conical, widely opened, thin-walled, commonly with quadrangular, unequal pores arranged in more or less distinct transverse rows, especially in the distal part. Feet strongly diverging, slender, curved inward, shorter or longer than height of cephalis and thorax. Outer blades of feet well pronounced on the thoracic wall. All blades of feet more or less dentate.

REMARKS

This new species is well distinguished from all the other species of Napora so far described by its denticulate feet, thin-walled thorax, and the presence of one verticil of long spines on the apical horn.

Figures

FIG. 29. — A, B, Napora lomoalta Hull, 1997; A, right lateral view; B, view from Ll; C, D, Napora matsuokai n. sp.; C, holotype, left lateral view; D, paratype, left lateral view; E-G, Napora modesta n. sp.; E, holotype, dorsal view; F, G, paratypes; F, dorsal view; G, view from Lr; H, I, Napora pacifica Kiessling, 1999; H, view from Ll; I, view from Lr; J, K, Napora pyramis n. sp.; J, holotype; K, paratype; L-N, Napora schaudibergensis n. sp.; L, M, paratypes; L, dorsal view; M, view from Ll; N, holotype, view from Lr; O, Napora sp., left lateral view. Abbreviations: Ll, left primary lateral spine; Lr, right primary lateral spine. Scale bars: A, H, I, M, N, 100 µm; B-G, J-L, O, 30 µm.