planispiral sentence in Hindi
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- The shell of species within this family varies from planispiral to needle-shaped.
- The shape of the shell is planispiral.
- This is an easily recognizable species : the shell is flat-coiled ( planispiral ).
- Many cephalopods and tubeworms can also have a planispiral shell ( Allaby and Allaby, 1999 ).
- The test is free, starting with a brief planispiral coil followed by a straight uncoiled stage.
- The shells are conical and curved in a planispiral way, and they are usually whitish in color.
- In a few gastropod families the shells are not helical in their coiling, but instead are planispiral, flat-coiled.
- Those in the Globorotaliacea are typically trochospiral and smooth while those in the Globigerinacea are trochospiral to planispiral in arrangement and spinose.
- A spiral shell can be visualized as consisting of a long helical or planispiral shape, for reasons of both strength and compactness.
- Asterigerinacea are characterized by a trochospiral or nearly planispiral arrangement of the chambers, which are fully or partially subdivided by internal partitions.
- The test ( or shell ) usually starts off streptospiral ( coiled irregularly ) hence the name, and becomes planispiral in the mature stage.
- For the rest, nautilids adapted the standard planispiral shell form, although not all were as tightly coiled as the modern nautilids ( Teichert 1988 ).
- Ancyloceratidae are derived from the Crioceratidae, a family of Lower Cretaceous ammonites with loosely wound, open planispiral shells, probably originating from within the suborder Lytoceratina.
- J . B . Knight, " et al . " ( 1960 ) regarded the bellerophontids as torted gastropods even though they have essentially symmetrical, planispiral shells.
- The microspheric test begins with a short planispiral stage, later chambers spreading successively from flabeilliform ( fan-shaped ) to reniform ( kidney-shaped ) and finally annular.
- A third complex consists of species with rather large, openly coiled to nearly planispiral shells with pronounced prickly sculpture and widely expanded outer lips; the shells are often strongly patterned.
- "' Planispiral "'is a condition in which a tubicolous shell is coiled in a single horizontal plane and the diameter increases away from the axis of coiling.
- The included genera are characterized by asymmetrical, semi-involute to partially evolute, aragonitic tests consisting of an undivided planispiral or trochospiral tubular chamber wound about the proloculus, or initial chamber.
- The word is also applied to the depressed central area on the planispiral coiled shells of " Nautilus " species and fossil ammonites . ( These are not gastropods, but shelled cephalopods .)
- "Annuloceras " is a heteromorph ammonite similar in form to other heteroceratids except that the early helix is more loosely wound . " Macroscaphites " differs in that the early portion is planispiral and tightly wound.
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