与 «NEPIONIC»相关的英语书籍
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nepionic的用法。与
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1
Cenozoic Foraminifera of Micronesia
Three types of nepionic stage, easily distinguishable, are recognized in this
family although some intermediate types are found among them. They are: the
complanata-borneesis-ecuadormsis type, the indonesiensis type, and the biflda
type.
2
The Lower Cretaceous Gryphaeas of the Texas Region
The stage is sharply marked off from the succeeding nepionic. The nepionic. —
The relationship that the nepionic growth bears to the prodissoconch is
interesting. It should be stated here that the anterior margin of the prodissoconch
is ...
Robert Thomas Hill, Thomas Wayland Vaughan, 1898
3
Devonian Ammonoids of America
It should perhaps be emphasized that this asymmetry is not inherent in the
protoconch, but, rather, in the direction of revolution at the commencement of the
nepionic stage. As the width of the protoconch is greater than that of the first
volution of ...
4
Geological Survey Professional Paper
Specimens that are here described from the lower part of the Nevada Formation
have a deep calice extending downward to the nepionic growth so that
transverse sections show little structure. Odontophyllum meeki n. sp. Plate 9,
figures 1-5 ...
Geological Survey (U.S.), 1974
5
Biotic Recovery from Mass Extinction Events
At a variable distance from the protoconch there is often a varix or nepionic
constriction. This is taken to indicate the normal hatching from the egg capsule.
The early stage up to this constriction is referred to as the ammonitella (
Drushchits ...
6
The molluscan fauna of the Alum Bluff group of Florida
The nepionic shell in Chama is very small (about 0.5 millimeter) apd has a
minute sculpture of close radiating and somewhat more distant concentric riblets
(cf. Anthony, 1905). In Pseudochama the nepionic shell is sculptured just as in ...
7
International Union of Geologial Sciences Proceedings of the ...
MIOGYPSINIDAE OF EUROPE AND NORTH AFRICA C. W. DROOGER » Plate g
, table ю The main characteristics used for specific separation in the genus
Miogypsina s.L, are to be found in the nepionic part of the test. In the course of
time ...
8
Evolution and Geological Significance of Larger Benthic ...
The variation in the (A) microspheric and (B–G) megalospheric embryonic and
nepionic chambers of Cycloclypeus, modified after Tan Sin Hok (1932).
Enlargement factors only refer to the nepionic stage. The last whorls shown are
the first of ...
Marcelle K. BouDagher-Fadel, 2008
9
Proceedings of the American Philosophical Society Held at ...
The nepionic stage is given in Fig. 23, from the side showing the lateral
longitudinal ridges of the paranepionic and part of the meta- nepionic substage.
These ridges are more acute on the venter and wider apart and blunter on the
sides.
10
Nautilus: The Biology and Paleobiology of a Living Fossil, ...
Nepionic constriction («-). (A) Specimen of Nautilus sp. from the Loyalty Islands (
DMNH 117070). This specimen lacks the nepionic constriction and may have
died at hatching. (B) Specimen of N. pompilius from the Philippines (SUI 40044).
W. Bruce Saunders, Neil H. Landman, 2009
