planispiral sentence in Hindi
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- Chambers are tubular, one-half coil in length, at first added in a sigmoiline ( S-shaped ) series starting at slightly more than 180?apart . the angle gradually decreasing until the later whorls are planispiral.
- ""'Metrolytoceras " "'is an extinct cephalopod genus that lived during the Middle Jurassic, characterized by a planispiral evolute shell with smooth middle and outer whorls, flat sides, and simplified sutures.
- Hemigordiopsids are characterized by tests in which the proloculus, or first chamber, is followed by an undivided tubular second chamber that is streptospirally coiled, ( like a ball of string ), at least in early stage, later may be planispiral, involute, or evolute.
- The shell, or conch, of " Balearites " is planispiral; whorls compressed, fairly flat sided, barely in contact ( sub-gyroconic ); venter ( outer rim ) rounded; ribs fine, flexious, branching equally in 2s, 3s, or 4s from weak umbilical tubercles.
- Many of the species in this family have coiled shells that are planispiral, in other words, the shells are more or less coiled flat, rather than having an elevated dextral, the shell of coiled planorbids is in fact sinistral in coiling, but is carried upside down, which makes it appear to be dextral.
- "Aegocrioceras " is coiled in an open planispiral; whorls are strongly ribbed and bear spines on the outer shoulders ( ventro-lateral ) of the inner whorls . " Aegocrioceras " is similar to the earlier Upper Valanginian " Juddiceras " of Germany and to the later " Shasticrioceras " from the Barremian of California and Japan.
- M . L . Thompson ( 1964 ) gives the following diagnosis : Shell large, fusiform to irregularly cylindrical, planispiral, involute in most, irregularly uncoiled in some; spirotheca thick, composed of tectum and alveolar kariotheca; septa fluted in end zones of primitive genera, fluted completely across shell and to tops of chambers of more advanced genera; tummel singular in most forms, multiple in one genus; axial fillings absent to massive; chomata massive to slight.
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