222:
is rather unusual in its wavy keel that leans alternatingly to one side then the other. Shells are involute, compressed, with a narrow venter and distinct inner and outer ribs, both sets of which are curved in a concave forward fashion.
354:
301:
W.J. Arkell, et al., 1957. Mesozoic
Ammonoidea, Treatise on Invertebrate Paleongology, Part L. Geological Society of America and University of Kansas Press.
246:
408:
341:
449:
279:
473:
442:
258:
478:
435:
309:
380:
468:
97:
385:
367:
359:
419:
372:
180:
462:
56:
213:
332:
31:
415:
168:
156:
144:
132:
76:
41:
81:
407:
326:
71:
66:
51:
46:
36:
346:
120:
86:
61:
108:
303:
212:
247:"A compendium of fossil marine animal genera (Cephalopoda entry)"
307:
423:
316:
216:stage, around the middle of the Upper Jurassic.
443:
8:
450:
436:
304:
17:
237:
7:
404:
402:
280:"Paleobiology Database - Cymaceras"
422:. You can help Knowledge (XXG) by
251:Bulletins of American Paleontology
14:
406:
1:
495:
401:
98:Scientific classification
96:
20:
474:Late Jurassic ammonites
257:: 1β560. Archived from
245:Sepkoski, Jack (2002).
418:-related article is a
381:Paleobiology Database
431:
430:
396:
395:
368:Open Tree of Life
310:Taxon identifiers
205:
204:
486:
452:
445:
438:
410:
403:
389:
388:
376:
375:
363:
362:
350:
349:
337:
336:
335:
305:
290:
289:
287:
286:
276:
270:
269:
267:
266:
242:
91:
28:
24:Temporal range:
18:
494:
493:
489:
488:
487:
485:
484:
483:
459:
458:
457:
456:
399:
397:
392:
384:
379:
371:
366:
358:
353:
345:
340:
331:
330:
325:
312:
294:
293:
284:
282:
278:
277:
273:
264:
262:
244:
243:
239:
229:
201:
200:Quenstedt, 1887
198:
197:
183:
181:Ochetoceratinae
171:
159:
147:
135:
123:
111:
92:
90:
89:
84:
79:
74:
69:
64:
59:
54:
49:
44:
39:
34:
26:
25:
22:
12:
11:
5:
492:
490:
482:
481:
479:Ammonite stubs
476:
471:
461:
460:
455:
454:
447:
440:
432:
429:
428:
411:
394:
393:
391:
390:
377:
364:
351:
338:
322:
320:
314:
313:
308:
299:
298:
292:
291:
271:
236:
235:
234:
233:
228:
225:
203:
202:
199:
191:
189:
185:
184:
179:
177:
173:
172:
167:
165:
161:
160:
155:
153:
149:
148:
143:
141:
137:
136:
131:
129:
125:
124:
119:
117:
113:
112:
107:
105:
101:
100:
94:
93:
85:
80:
75:
70:
65:
60:
55:
50:
45:
40:
35:
30:
29:
23:
13:
10:
9:
6:
4:
3:
2:
491:
480:
477:
475:
472:
470:
467:
466:
464:
453:
448:
446:
441:
439:
434:
433:
427:
425:
421:
417:
412:
409:
405:
400:
387:
382:
378:
374:
369:
365:
361:
356:
352:
348:
343:
339:
334:
328:
324:
323:
321:
319:
315:
311:
306:
302:
296:
295:
281:
275:
272:
261:on 2016-02-25
260:
256:
252:
248:
241:
238:
231:
230:
226:
224:
221:
217:
215:
211:
210:
196:
195:
190:
187:
186:
182:
178:
175:
174:
170:
166:
163:
162:
158:
154:
151:
150:
146:
142:
139:
138:
134:
130:
127:
126:
122:
118:
115:
114:
110:
106:
103:
102:
99:
95:
88:
83:
78:
73:
68:
63:
58:
53:
48:
43:
38:
33:
19:
16:
424:expanding it
413:
398:
317:
300:
297:Bibliography
283:. Retrieved
274:
263:. Retrieved
259:the original
254:
250:
240:
219:
218:
214:Kimmeridgian
208:
207:
206:
193:
192:
27:Kimmeridgian
15:
176:Subfamily:
133:Cephalopoda
469:Ammonitida
463:Categories
285:2017-10-19
265:2017-10-18
227:References
169:Oppeliidae
157:Ammonitida
145:Ammonoidea
140:Subclass:
333:Q18349684
318:Cymaceras
220:Cymaceras
209:Cymaceras
194:Cymaceras
104:Kingdom:
21:Cymaceras
416:ammonite
327:Wikidata
164:Family:
121:Mollusca
116:Phylum:
109:Animalia
373:2869982
360:1320610
347:3245950
188:Genus:
152:Order:
128:Class:
414:This
386:14744
355:IRMNG
232:Notes
420:stub
342:GBIF
32:Preκ
255:363
465::
383::
370::
357::
344::
329::
253:.
249:.
82:Pg
451:e
444:t
437:v
426:.
288:.
268:.
87:N
77:K
72:J
67:T
62:P
57:C
52:D
47:S
42:O
37:κ
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.