131:
111:
412:
which lived toward the end of the Middle
Jurassic, during the early Callovian, is characterized by an evolute shell with a single keel and strong, paired ribbing that arises at the edge of the umbilicus and ends in a row of ventrolateral submarginal tubercles.
335:, including its various subgenera, have a widespread distribution and have been found in the late Middle and early Upper Jurassic of Europe, North Africa, Somalia, India, Madagascar, and possibly Japan.
642:
515:
629:
417:, considered another subgenus, is characterized by a rapidly expanding, compressed, evolute shell with low broad ribbing on the outer flanks.
716:
731:
736:
711:
548:
706:
575:, 1957. Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology Part L. Geological Society of America and Univ. Kansas Press.
431:, a third subgenus from the lower Callovian, has smooth inner whorls and sinuous ribbing on the outer whorls, but no tubercles.
130:
701:
470:
is generally straight and radial, bifurcating about mid flank and meeting at a distinct median keel on the venter.
696:
527:
726:
721:
584:
668:
488:
from the same interval is stout whorled and unicarinate (single keeled), doubtfully distinct from
125:
474:
has large nodes on the inner half the whorl sides, and concavely curved ribs on the outer half.
673:
655:
647:
616:
660:
224:
281:
273:
110:
690:
285:
61:
621:
296:
may be seen as a series of some nine subgenera, beginning with the lower
Callovian
36:
607:
317:
277:
211:
198:
185:
172:
81:
46:
466:
from the upper
Callovian differ in the detail of their ribbing. Ribbing in
326:
289:
142:
86:
601:
269:
162:
76:
71:
56:
51:
41:
634:
91:
66:
152:
578:
516:"A compendium of fossil marine animal genera (Cephalopoda entry)"
447:
H. (Sublunuloceras)' into the lower
Oxfordian (Upper Jurassic).
582:
397:
although the two are generally considered equivalent.
591:
401:may be a fourth subgenus from the lower Callovian.
329:form the oppeliid subfamily, Hecticoceratinae.
455:has gentle sinuous ribbing and a single keel.
8:
579:
441:are both known from the middle Callovian;
109:
20:
423:, also from the lower Callovian, is like
506:
549:"Paleobiology Database - Hecticoceras"
480:from the lower Oxfordian is much like
7:
304:and ending with the lower Oxfordian
520:Bulletins of American Paleontology
14:
484:but tricarinate (three keeled).
393:is sometimes distinguished from
350:Hecticoceras (Hecticoceratoides)
129:
421:Hecticoceras (Hecticoceroides)
1:
478:Hecticoceras (Pseudobrightia)
427:except that it lacks a keel.
380:Hecticoceras (Pseudobrightia)
360:Hecticoceras (Sublunuloceras)
717:Jurassic ammonites of Europe
391:Hecticoceras (Orbignyiceras)
732:Callovian first appearances
460:Hecticoceras (Putealiceras)
410:Hecticoceras (Hecticoceras)
385:Hecticoceras (Eochetoceras)
370:Hecticoceras (Putealiceras)
345:Hecticoceras (Hecticoceras)
753:
355:Hecticoceras (Lunuloceras)
16:Genus of molluscs (fossil)
737:Late Jurassic extinctions
712:Middle Jurassic ammonites
445:just from that interval,
254:
249:
126:Scientific classification
124:
117:
108:
23:
435:Hecticoceras (Kheraites)
365:Hecticoceras (Kheraites)
280:, that lived during the
707:Late Jurassic ammonites
526:: 1β560. Archived from
514:Sepkoski, Jack (2002).
375:Hecticoceras (Brightia)
272:genus belonging to the
302:H. (Hecticoceratoides)
669:Paleobiology Database
451:is strongly ribbed.
325:from the underlying
439:H. (Sublunuloceras)
395:H. (Sublunuloceras)
306:H. (Pseudobrightia)
702:Ammonitida genera
684:
683:
656:Open Tree of Life
585:Taxon identifiers
486:H. (Eochetoceras)
425:H. (Hecticoceras)
310:H. (Eochetoceras)
298:H. (Hecticoceras)
261:
260:
245:
744:
677:
676:
664:
663:
651:
650:
638:
637:
625:
624:
612:
611:
610:
580:
559:
558:
556:
555:
545:
539:
538:
536:
535:
511:
453:(Sublunuloceras)
429:H. (Lunuloceras)
243:
236:
225:Hecticoceratinae
223:
210:
197:
184:
134:
133:
113:
103:
33:
29:Temporal range:
21:
752:
751:
747:
746:
745:
743:
742:
741:
697:Haploceratoidea
687:
686:
685:
680:
672:
667:
659:
654:
646:
641:
633:
628:
620:
615:
606:
605:
600:
587:
563:
562:
553:
551:
547:
546:
542:
533:
531:
513:
512:
508:
498:
407:
341:
323:Prohecticoceras
244:Bonarelli, 1893
242:
234:
221:
208:
195:
182:
128:
104:
102:
101:
100:
99:
94:
89:
84:
79:
74:
69:
64:
59:
54:
49:
44:
39:
31:
30:
27:
17:
12:
11:
5:
750:
748:
740:
739:
734:
729:
727:Oxfordian life
724:
722:Callovian life
719:
714:
709:
704:
699:
689:
688:
682:
681:
679:
678:
665:
652:
639:
626:
613:
597:
595:
589:
588:
583:
577:
576:
568:
567:
561:
560:
540:
505:
504:
503:
502:
497:
494:
490:(Putealiceras)
482:(Putealiceras)
468:(Putealiceras)
443:H. (Kheraites)
406:
403:
388:
387:
382:
377:
372:
367:
362:
357:
352:
347:
340:
337:
259:
258:
252:
251:
247:
246:
232:
228:
227:
219:
215:
214:
206:
202:
201:
193:
189:
188:
180:
176:
175:
170:
166:
165:
160:
156:
155:
150:
146:
145:
140:
136:
135:
122:
121:
115:
114:
106:
105:
97:
96:
95:
90:
85:
80:
75:
70:
65:
60:
55:
50:
45:
40:
35:
34:
28:
15:
13:
10:
9:
6:
4:
3:
2:
749:
738:
735:
733:
730:
728:
725:
723:
720:
718:
715:
713:
710:
708:
705:
703:
700:
698:
695:
694:
692:
675:
670:
666:
662:
657:
653:
649:
644:
640:
636:
631:
627:
623:
618:
614:
609:
603:
599:
598:
596:
594:
590:
586:
581:
574:
570:
569:
565:
564:
550:
544:
541:
530:on 2016-02-25
529:
525:
521:
517:
510:
507:
500:
499:
495:
493:
491:
487:
483:
479:
475:
473:
469:
465:
464:H. (Brightia)
461:
457:
456:
452:
448:
444:
440:
436:
432:
430:
426:
422:
418:
416:
411:
404:
402:
400:
399:H. (Chanasia)
396:
392:
386:
383:
381:
378:
376:
373:
371:
368:
366:
363:
361:
358:
356:
353:
351:
348:
346:
343:
342:
338:
336:
334:
330:
328:
324:
320:
319:
315:
311:
307:
303:
299:
295:
291:
287:
286:Late Jurassic
283:
279:
275:
274:haploceratoid
271:
267:
266:
257:
253:
248:
241:
240:
233:
230:
229:
226:
220:
217:
216:
213:
207:
204:
203:
200:
194:
191:
190:
187:
181:
178:
177:
174:
171:
168:
167:
164:
161:
158:
157:
154:
151:
148:
147:
144:
141:
138:
137:
132:
127:
123:
120:
116:
112:
107:
93:
88:
83:
78:
73:
68:
63:
58:
53:
48:
43:
38:
26:
22:
19:
593:Hecticoceras
592:
572:
566:Bibliography
552:. Retrieved
543:
532:. Retrieved
528:the original
523:
519:
509:
489:
485:
481:
477:
476:
471:
467:
463:
459:
458:
454:
450:
446:
442:
438:
434:
433:
428:
424:
420:
419:
414:
409:
408:
405:Descriptions
398:
394:
390:
389:
384:
379:
374:
369:
364:
359:
354:
349:
344:
333:Hecticoceras
332:
331:
322:
316:
314:Hecticoceras
313:
309:
305:
301:
297:
294:Hecticoceras
293:
265:Hecticoceras
264:
263:
262:
255:
239:Hecticoceras
238:
237:
118:
25:Hecticoceras
24:
18:
449:(Kheraites)
288:, from the
218:Subfamily:
173:Cephalopoda
119:H. hecticum
691:Categories
554:2017-10-19
534:2017-10-18
496:References
472:(Brightia)
415:(Chanasia)
318:sensu lato
278:Oppeliidae
250:Subgenera
212:Oppeliidae
199:Ammonitida
186:Ammonoidea
179:Subclass:
339:Subgenera
327:Bathonian
290:Callovian
256:See text
149:Kingdom:
143:Eukaryota
32:Callovian
608:Q9286967
602:Wikidata
270:ammonite
205:Family:
163:Mollusca
159:Phylum:
153:Animalia
139:Domain:
661:4956311
648:1342427
635:4626017
571:Arkell
276:family
231:Genus:
192:Order:
169:Class:
98:↓
573:et al.
282:Middle
268:is an
674:14974
643:IRMNG
622:6367Z
501:Notes
462:and
630:GBIF
437:and
321:and
308:and
300:and
284:and
37:Preκ
617:CoL
524:363
312:.
693::
671::
658::
645::
632::
619::
604::
522:.
518:.
492:.
292:.
87:Pg
557:.
537:.
235:β
222:β
209:β
196:β
183:β
92:N
82:K
77:J
72:T
67:P
62:C
57:D
52:S
47:O
42:κ
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