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in vertical longitudinal section, a somewhat unusual feature. Dorsal annuli only begin to form when the rod has almost filled the entire siphuncle toward to apical end. Connecting rings are thin, but layered. Cameral deposits are known from the dorsal side, the ventral side of the type specimen lost
333:
Stephen C. Hook and
Rousseau H. Flower 1977. Late Canadian (Zones J,K) Cephalopod Faunas from Southwestern United States. Memoir 32, New Mexico Bureau of Mines and Mineral Resources.
403:
449:
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247:. The siphuncular rods, which lie along the lower (ventral) side of the siphuncle interiors show thin, slightly undulating, growth
109:
444:
358:
416:
280:
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346:
256:
198:
104:
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because of the siphunclular rod and thin connecting rings. Evans (2005) proposed the family
264:
177:
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438:
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that lived in what is now western North
America during the latter part of the Early
300:
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is named for one of the characters, the range ranger, in the Tajar stories by
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151:
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8:
284:from Great Britain and included them in the
239:are smooth, slightly depressed, rod-bearing
353:
20:
298:. Other Tajar story based genera include
320:came from the Wahwah Limestone in the
16:Extinct orthoceratoid cephalopod genus
7:
243:with moderately large submarginal
14:
450:Taxa named by Rousseau H. Flower
339:
108:
1:
278:and a somewhat similar genus
466:
259:(1977) originally placed
105:Scientific classification
103:
23:
417:Paleobiology Database
318:Rangeroceras hintzei
347:Paleontology portal
432:
431:
359:Taxon identifiers
324:in Western Utah.
281:Cyclorangeroceras
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272:Rangeroceratidae
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178:Rangeroceratidae
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113:
112:
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35:
29:Temporal range:
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445:Orthoceratoidea
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296:Jane Shaw Ward
268:Baltoceratidae
252:from erosion.
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213:is an extinct
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15:
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2:
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348:
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313:Veneficoceras
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286:Dissidocerida
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215:orthoceratoid
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165:Dissidocerida
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95:
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55:
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26:
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367:Rangeroceras
366:
317:
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292:Rangeroceras
291:
290:
279:
276:Rangeroceras
275:
261:Rangeroceras
260:
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237:Rangeroceras
236:
234:
210:Rangeroceras
209:
208:
207:
192:Rangeroceras
191:
190:
25:Rangeroceras
24:
18:
301:Tajaroceras
197:Hook &
152:Cephalopoda
439:Categories
328:References
316:The type,
307:Wardoceras
245:siphuncles
241:orthocones
235:Shells of
231:Background
225:Ordovician
218:cephalopod
322:Ibex area
255:Hook and
128:Kingdom:
122:Eukaryota
33:Cassinian
382:Q7292788
376:Wikidata
249:lamellae
171:Family:
142:Mollusca
138:Phylum:
132:Animalia
118:Domain:
409:1098534
396:4624230
263:in the
184:Genus:
158:Order:
148:Class:
310:, and
265:family
257:Flower
201:, 1977
199:Flower
422:12412
404:IRMNG
221:genus
391:GBIF
274:for
39:Preκ
441::
419::
406::
393::
378::
304:,
288:.
227:.
89:Pg
188:β
175:β
162:β
94:N
84:K
79:J
74:T
69:P
64:C
59:D
54:S
49:O
44:κ
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