与 «UMBONAL»相关的英语书籍
在以下的参考文献中发现
umbonal的用法。与
umbonal相关的书籍以及同一来源的简短摘要提供其在 英语文献中的使用情境。
1
Molluscan Palaeontology of the Pliocene-Pleistocene Kap ...
Material: Member B, unit B1, 50.2: one umbonal fragment and several plate
fragments, 59.2: 29 left valves, 30 right valves, and 15 umbonal fragments, 69.1:
one left valve, one right valve, four umbonal and many plate fragments, 74.1: one
...
2
Molluscan Faunas of the Flagstaff Formation of Central Utah
Umbonal region of a specimen with both valves, showing umbonal sculpture.
Hypotype No. 20880, lower part of Flagstaff formation, Locality 36. X 1 2.
Umbonal sculpture of another specimen, enlarged to show umbonal ridges and
post— ...
3
United States Geological Survey Professional Paper
In addition to the pedal retractory muscles, situated one above the anterior
occlusor scar and one over the posterior scar, there are usually discernible in the
antero-umbonal region three minute muscular impressions, the strongest one ...
4
Geological Survey Professional Paper
"Shell small, convex, outline obliquely cordate, anterior and ventral margins
broadly rounded, the posterior obtusely truncate, the postero-dorsal somewhat
arched; umbonal area convex; beak prosogyrate, curved forward, low, at about
the ...
Geological Survey (U.S.),
1992
5
The Fauna of the Chapman Sandstone of Maine: Including ...
In addition to the pedal retractory muscles, situated one above the anterior
occlusor scar and one over the posterior scar, there are usually discernible in the
antero-umbonal region three minute muscular impressions, the strongest one ...
Henry Shaler Williams, Carpel Leventhal Breger,
1916
6
Professional paper - United States Geological Survey
The strong beak sculpture, which is the characteristic feature of the species,
covers the umbonal region of the shell for a distance of 16 to 20 millimeters from
the apex. It consists near the apex of sharp, slightly undulating concentric ridges
...
Geological Survey (U.S.),
1917
7
A Dictionary for Invertebrate Zoology:
(MOLL: Bivalvia) That region of the valve sur- rounding the point of maximum
curvature of the longitudi- nal dorsal profile; when not coinciding with the beak,
ex- tending to its base. umbonal a. umbonal angle (MOLL: Bivalvia) In pectinoid ...
8
El-Ahwat, A Fortified Site from the Early Iron Age Near ...
plete and one damaged valve; A-A; L-5108; B-51058: umbonal fragment; A-A; L-
5111; B-51094; one valve and one umbonal fragment; A-A; L-5111; B-51150:
one damaged valve and one fragment; A-A; L-5112; B-51100: two valves of
which ...
9
Journal of the Royal Society of New Zealand
DESCRIPTION: Shell small, anterior and posterior ventral margins destroyed.
Umbo terminal or almost terminal, passing ventrally onto long sinuous umbo and
strongly defined umbonal ridge, falling steeply to anterior margin in front, and ...
10
Fossil Conchostraca of the Southern Hemisphere and ...
Defretin, both of which are more vertically subovate, and in its umbonal position,
which is closer to the anterior margin than in either of the Congo species (
Defretin-Le Franc, 1967, p. 71-78, Pls. 9 and 10; Novojilov, 1961, p. 61—71, Text-
Figs.