Tripedocorbis tardus, 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 : 36

Tripedocorbis tardus n. sp. ( Fig. 19 G-J)

HOLOTYPE. — Photo No. 60084, 60086; stub Mue 22/23; Musée de Géologie , Lausanne, No. 74394 ( Fig. 19G, H ).

ETYMOLOGY. — From the Latin tardus : late.

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

DIMENSIONS ( IN µM). — Height of cephalis without feet 68-85, maximum diametre 57-58, length of feet 50-58.

DESCRIPTION

Cephalis inverted conical, open apically, with pores variable in size, shape and arrangement, most of them triangular to tetragonal by intersection of bars of various thickness and directions. Initial spicule with spines A, V, D, L, l, and a small Ax, united by the arches Al, Dl, Ll, and LV. D and L prolonged into thin massive, straight strongly divergent feet armed with small spinules radiating obliquely. Apical spine prolonged along the dorsal part of the cephalic wall up to its apex and shortly beyond it. Ventral spine extended outside cephalic wall. Secondary lateral spines short, not prolonged beyond cephalis.

REMARKS

Tripedocorbis tardus n. sp. may be compared to the middle Anisian species T.(?) gratiosus Dumitrica, 1991 by its general shape and by having an apically open cephalis, but differs from it by a shorter ventral spine, longer feet armed with spinules, and by the lack of transverse ribs.

Figures

FIG. 19. — A-F, Takoum takemurai n. sp.; A-C, holotype, right lateral and basal views, and details of the initial spicule and arches; D-F, paratype, partly broken but with some spines completely preserved, left lateral, dorsal and basal views; G-J, Tripedocorbis tardus n. sp.; G, H, holotype, left lateral and basal views respectively with details of the initial spicule and arches; I, J, paratype, dorsal and basal views. Scale bars: 30 µm.