Crucella, Pessagno, 1971

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 : 16

Crucella sp.

( Fig. 5J )

FIGURED SPECIMEN. — ULVG-7339.

MATERIAL. — Three specimens (recovered with the hydrogen peroxide method); two specimens (recovered with the acetic acid method).

DESCRIPTION

Four-rayed hagiastrid, without bracchiopyle. Rays are equal in length, sharply pointed distally, with tri(?)-bladed spines at extremities. Rays are subcircular to elliptical in cross-section. Central area slightly elevated. Rays present pores composed of tetragonal pore-frames, linearly aligned.

REMARKS

All the recovered specimens present broken spines at extremities.

Family SPONGODISCIDAE Haeckel, 1862 Genus Tholodiscus Petrushevskaya & Koslova, 1972

Figures

FIG. 5. — SEM images of Radiolaria recovered from sample 999B/60/2W/70-74 cm: A, Rhopalosyringium kleinum Empson-Morin, 1981 (H2O2 method); B, Botryometra heros (Campbell & Clark, 1944) (H2O2 method); C, Cryptamphorella sp. (H2O2 method); D, Theocapsomma sp. (Empson-Morin, 1981) (CH3COOH method); E, Praeconocaryomma californiaensis Pessagno, 1976 (H2O2 method); F, Alievium? sp. (H2O2 method); G, Paronaella? sp. (H2O2 method); H, Orbiculiforma sp. 1 (H2O2 method); I, Orbiculifor- ma sp. 2 (CH3COOH method); J, Crucella sp. (H2O2 method); K, Tholodiscus sp. (H2O2 method); L, Spumellaria gen. et sp. indet. (H2O2 method). The chemical compound after each species indicates the chemical method applied in the recovery of each figured specimen. Scale bars: 100 µm.