Definition of Delthyrium. Meaning of Delthyrium. Synonyms of Delthyrium

- pedicle, when present, takes up a portion of the delthyrium. Despite their ubiquity, the delthyrium and notothyrium are not always fully visible. Many...
- to open and close. There is usually a functional pedicle although the delthyrium may be partially closed. Morphologically, the rhynchonellid has changed...
- diamond-shaped profile. The pseudodeltidium is voluminous, covering most of the delthyrium (ventral indentation) and taking up a large portion of the ventral valve...
- cavities of both valves. No pedicle collar observed in sectioned specimens; delthyrium wide, trapezoidal to rectangular in shape; lateral cavities narrow and...
- excavation or furrow, known as a notothyrium (in the dorsal valve) or a delthyrium (in the ventral valve). Finally, these furrows may be partially covered...
- structures delicate. No pedicle collar observed in two sectioned specimens. Delthyrium wide, trapezoidal; lateral cavities narrow; dental plates long, beyond...
- with of the s****), almost entirely situated in the backfolding part (or delthyrium) of the pedicle valve (submesothyridid to almost hypothyridid), leaving...