Poculinapora poculigera, 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 : 66-68

Poculinapora poculigera n. sp. ( Figs 30 F-I; 32D)

HOLOTYPE. — Photo No. 58169, 58170; stub Mue 22/20; Musée de Géologie , Lausanne, No. 74422 ( Fig. 30F, I ).

PARATYPES. — MNHN, bât. de Géologie, No. Gg 2001/2117-2118.

ETYMOLOGY. — From the Latin poculum: cup; and gero: to bear, to have.

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

DIMENSIONS ( IN µM). — Total length of shell 275-320 (av. 305), length of apical horn 57-64 (av. 59), of cephalis 37-40 (av. 38), of thorax 59-64 (av. 60), of feet 140-155 (av. 150); total width 175-220 (av. 205), width of cephalis 38-44 (av.41),of thorax 105-115(av.110).

DESCRIPTION

Cephalis small, globular, imperforate, smooth or slightly pustulate, separated from thorax by a shallow constriction. Apical horn straight or slightly curved, inverted pyramidal, having a wide cavity with triangular transverse section. Border of this cavity (distal end of horn) straight, thin, without spines but frayed due to corrosion. Inner space of this cavity simple or divided by a longitudinal septa. Thorax hemispherical with pustulose surface and pores arranged in four to six transverse rows; in distal rows they are arranged in a square pattern, in proximal rows alternate. Size of pores decreases apically. Feet long, divergent, and curved. Lateral blades of feet expanded distally, external blade tapered distally. Feet connected proximally by a thin postthoracic velum with quadrangular meshes.

REMARKS

This new species differs from P. marsupialis n. sp. and P. tripartita n. gen., n. sp. by having no terminal spine on the apical horn and by the funnelshaped distal part of the apical horn.

Figures

FIG. 30. — A, B, Napora timida n. sp.; A, holotype, view from Lr; B, paratype, view from Lr; C, Poculinapora tripartita n. gen., n. sp., holotype, view from Lr; D, E, Poculinapora marsupialia n. gen., n. sp; D, holotype, view from Ll; E, paratype, dorsal view; F-I, Poculinapora poculigera n. gen., n. sp.; F, I, holotype, view from Lr and detail of apical horn; G, H, paratype, view from Lr and detail of apical horn in subapical view. Abbreviations: Ll, left primary lateral spine; Lr, right primary lateral spine. Scale bars: A-G, 100 µm; H, 30 µm; I, 10 µm.