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120:. The umbo forms while the animal is a juvenile, and radial growth subsequently proceeds around that area. The umbo is situated above the
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128:, the umbones can nonetheless usually be readily identified by examining the concentric growth lines of the shell.
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190:"Advanced glossary of molluscan terms | The Conchological Society of Great Britain and Ireland"
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124:. In those bivalves where the umbones do not protrude, as is the case for example in some
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Diagram of a bivalve shell viewed from the dorsal side: 1:Plane of symmetry
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59:(Lightfoot, 1786), the umbones are at the top of the image
196:. The Conchological Society of Great Britain and Ireland
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Diagram of the left valve of a bivalve resembling a
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131:Umbo is also in use in anatomic descriptions of
116:are sometimes helpful in distinguishing bivalve
34:on the right, next to the forward facing umbo.
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135:, for the origin of growth of the valves.
30:aspect in order to show the brown-tinted
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108:. It usually contains the valve's
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53:A side view of a whole shell of
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508:. You can help Knowledge by
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20:A left valve of a juvenile
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23:Mercenaria campechiensis
504:-related article is a
170:. University of Oregon
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220:www.manandmollusc.net
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165:"Mollusca: Bivalva"
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56:Cucullaea labiata
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416:Adductor muscles
383:Other hard parts
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222:. Archived from
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163:Brink, Laura A.
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26:viewed from the
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69:2:Growth lines
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226:on 5 May 2012
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510:expanding it
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334:Periostracum
324:Pallial line
228:. Retrieved
224:the original
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198:. Retrieved
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172:. Retrieved
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21:
472:Trochophore
467:Pseudofeces
299:Hinge teeth
133:brachiopods
549:Categories
462:Glochidium
436:Nephridium
409:Soft parts
294:Hinge line
216:"Bivalves"
151:References
122:hinge line
114:hinge line
71:3:Ligament
421:Ctenidium
354:Sculpture
344:Resilifer
457:Abductin
400:Sea silk
349:Resilium
304:Ligament
139:See also
103:univalve
81:(plural
502:bivalve
477:Veliger
274:anatomy
272:Bivalve
126:mussels
106:mollusc
99:bivalve
93:of the
83:umbones
44:venerid
441:Siphon
431:Mantle
390:Byssus
374:Annuli
314:Lunule
289:Callus
230:27 May
200:27 May
174:27 May
73:4:Umbo
32:lunule
28:dorsal
500:This
450:Other
395:Pearl
364:Valve
359:Umbo
319:Nacre
281:Shell
168:(PDF)
97:of a
95:shell
91:valve
87:umbos
506:stub
369:Beak
309:Lira
232:2017
202:2017
176:2017
118:taxa
110:beak
79:umbo
77:The
101:or
85:or
551::
218:.
192:.
537:e
530:t
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512:.
264:e
257:t
250:v
234:.
204:.
178:.
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.