Dictyomitra, Zittel, 1876

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 : 10

Dictyomitra sp. 1

( Fig. 4E )

FIGURED SPECIMEN. — ULVG-7322.

MATERIAL. — One specimen (recovered with the hydrogen peroxide method); seven specimens (recovered with the acetic acid method).

DESCRIPTION

Test conical proximally and becoming somewhat cylindrical distally; lobulate and costate throughout (about 11 costae in lateral view). Cephalis sharply pointed apically, with costae converging in the cephalic area. Post-cephalic segments somewhat cylindrical. Distal margin ragged,with poor-developed costal projections.

REMARKS

The poor preservation of the specimens does not assure the specific identification.

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.