Amphipyndax tylotus Foreman, 1978

Kochhann, Karlos G. D., Baecker-Fauth, Simone & Fauth, Gerson, 2013, Late Maastrichtian Radiolaria from ODP Leg 165 - Site 999 B, Colombian Basin, Geodiversitas 35 (1), pp. 5-20 : 12

Amphipyndax tylotus Foreman, 1978 ( Fig. 4H )

Amphipyndax tylotus Foreman, 1978: 745 , pl. 4, figs 1, 2. — Sanfilippo & Riedel 1985: 598, fig. 7-2a, b.

FIGURED SPECIMEN. — ULVG-7325.

MATERIAL. — 12 specimens (recovered with the hydrogen peroxide method); nine specimens (recovered with the acetic acid method).

OCCURRENCE. — Upper Campanian to Maastrichtian of central Pacific, and western and eastern central Atlantic ( Sanfilippo & Riedel 1985); Late Campanian to Early Maastrichtian of Japan ( Hollis & Kimura 2001).

REMARKS

Amphipyndax tylotus differs from A. pseudoconulus ( Pessagno, 1963) by the randomly distributed nodes on the skeleton surface instead of restricted to the segmental divisions. For the revised synonymy of the species see Hollis & Kimura (2001).

Figures

FIG. 4. — SEM images of Radiolaria recovered from the sample 999B/60/2W/70-74 cm: A, Archaeodictyomitra cf. A. squinaboli Pes- sagno,1976 (H2O2 method);B, Archaeodictyomitra cf. A. lamellicostata (Foreman, 1968) (H2O2 method); C, Archaeodictyomitra? sp. 1 (H2O2 method); D, Archaeodictyomitra? sp. 2 (H2O2 method); E, Dictyomitra sp. 1 (H2O2 method); F, Dictyomitra sp. 2 (H2O2 method); G, Mita regina? (Campbell & Clark, 1944) (CH3COOH method); H, Amphipyndax tylotus Foreman, 1978 (H2O2 method); I, Stichomitra asymbatos Foreman,1968 (H2O2 method);J, Stichomitra? sp.1 (H2O2 method); K, Stichomitra? sp. 2 (H2O2 method); L, Rhopalosyrin- gium magnificum Campbell & Clark,1944 (H2O2 method). The chemical compound after each species indicates the chemical method applied in the recovery of each figured specimen. Scale bars: 100 µm.