Anaticapitula pennata, 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 : 56

Anaticapitula pennata n. sp. ( Fig. 27E, F )

HOLOTYPE. — Photo No. 31632; stub Mue 22/4; Musée de Géologie , Lausanne, No. 74409 ( Fig. 27E ). ETYMOLOGY. — From the Latin pennatus: winged.

MATERIAL EXAMINED. — Two illustrated specimens from the type horizon (sample Mue 22), and two specimens from sample Mue 6.

DIMENSIONS ( IN µM). — Total length 200-240 (av. 220), length of apical horn 60-80 (av. 70), of feet 25-50 (av. 40), of cephalis 30-40 (av. 35), of thorax without terminal tube 50-65 (av. 55), of terminal tube 50-75 (av. 60), diametre of cephalis 70-100 (av. 80), of thorax with feet 130-160 (av.145), of terminal tube 55-90 (av.75).

DESCRIPTION

Test short cylindrical with a robust three-bladed apical horn and three three-bladed feet arising at the level of the collar boundary. Initial spicule with moderately long Ax. Cephalis thick-walled, covered with a robust external layer forming polygonal (usually triangular to quadrangular) meshes, size of meshes decreasing distally. Feet with the two lateral blades connected to the test at the lower part of thorax. Feet short, divergent, slightly curved, and rapidly tapering, their distal ends above the base of the terminal tube. The latter is short, cylindrical to slightly triangular in cross section.

REMARKS

A. pennata n. gen., n. sp. was compared to A. clauda n. gen., n. sp. under the latter species. From Jacus (?) anatiformis it differs in being shorter, in having a shorter terminal tube and a slightly different superficial ornamentation. Although De Wever (1982) described his species as having a large ventral pore, this pore is not visible in none of the original figures.

Figures

FIG. 27. — A, B, K, Anaticapitula clauda n. gen., n. sp.; A, holotype, left lateral view; B, K, paratypes; B, right latero-dorsal view; K, basal view showing initial cephalic structure, note thin Ax; C, D, Anaticapitula germanica n. gen., n. sp.; C, holotype, right lateral view; D, paratype, view from Ll; E, F, Anaticapitula pennata n. gen., n. sp.; E, holotype, view from Lr; F, paratype, ventral to right lateral view; G-J, Anaticapitula tenera n. gen., n. sp.; G, holotype, view from Ll; H-J, paratypes; H, basal view, note Ax in the centre; I, ventral view; J, view from Ll. Abbreviations: Ax, axial spine; Ll, left primary lateral spine; Lr, right primary lateral spine. Scale bars: A-H, I, J, 30 µm; K, 10 µm.