ostracod

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ostracod

a small, aquatic, bivalved crustacean of the subclass Ostracoda. The calcified shells of ostracods form important indicators in palaeontology and are important in palaeoclimatological studies as they are sensitive to differing concentrations of dissolved materials.
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Ostracode identification: Ostracodes were selected from surface sediment samples with fine brushes.
Sediment was sampled using either an Ekman dredge or a piston corer with a five-inch diameter plastic tube, and in both cases the uppermost 1-2 cm of sediment was subsampled for ostracode valves.
Detritus within coral intraskeletal pores is significantly finer, consisting mostly of mudstone with minor silt-size skeletal components (including ostracodes).
Following fixation and staining, the epidermis of each ostracode was dissected and allowed to air dry on a microscope slide for at least 1 h before scanning at 1000x magnification.
Temporal and spatial distribution of ostracodes across the Pennsylvanian-Permian boundary interval in eastern North America.
(1987): Analyse quantitative de la distribution des ostracodes et de leurs gisements dans le bassin eocretace d'Oliete (Espagne).
Wavy-bedded, skeletal grain- to wackestones (packstone dominating) with numerous rounded skeletons of stromatoporoids, corals, and rare calcareous algae, oncolites, gastropods, and lepertitide ostracodes.
The grainstone is composed of about 80 percent ooids nucleated on a variety of bioclasts that include crinozoans, bryozoans, trilobites and ostracodes. At some levels peloids and grapestone textures occur.
They come from grey and greenish-grey limestones with thin interlayers of clay containing also ostracodes, bivalves, and scales of thelodonts, fragments of osteostracans and anaspids.
-- We report three ostracode species from the Tecovas Formation near Kalgary, Crosby Co., Texas: one species of Darwinula, one species of Gerdalia, and a large, unidentified ostracode.
Three ostracode zones were identified based on changes in major taxa abundance of LGH-5.