193:
which is now recognized as late Upper
Cambrian in age (Chen and Teichert, 1983; Teichert, 1988; Landing and Kroger, 2009) rather than Lower Ordovician as thought by Flower (1954) and Teichert (1964).
277:
175:, presumed ventral (Flower, 1954). the central siphuncle in Sun's analysis turns out to be an adventitious feature. Also, according to Flower (1954) there are no
179:
in this fossil, eliminating it from the
Endocerida. Moreover, the earliest endocerids have been shown to be derived from the Ellesmerocertidae in the
264:
218:
Teichert, 1988. Main
Features of Cephalopod Evolution. The Mollusca Vol 12. Paleontology and Neontology in Cephalopods. Academic Press Inc.
212:
Teicert, C. 1964. Nautiloidea - Ellesmerocerida. Treatise on
Inverterate Paleontology Geological Soc. of America and Univ. Kansas Press.
333:
328:
153:. Because of its apparently poor preservation its ordinal and familial position is uncertain. It could be included in either the
209:
Flower, R. H, 1954, Cambrian
Cephalopods. Bulletin 40, New Mexico Bureau of Geology and Mineral Resources. Socorro NM. .
323:
318:
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Landing, Ed and B Kroger, 2009. The Oldest
Cephalopods from East Laurentia. Jour of Paleontology 2009, pp 123–127
232:
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139:
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176:
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161:, family Ellesmeroceratidae (Flower, 1954). On the other hand, Teichert (1964) included
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among the
Cambrian cephalopods, which brings up the question of its possible synonymy.
146:
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91:
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66:
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Chen and
Teichert, 1983. Cambrian Cephalopods, Geology V 11, Nov. 1983
54:
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of north-eastern China, described by Sun (1937) as a primitive
239:
8:
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189:comes from the Wanwankou Member of the
7:
196:Chen and Techert (1983) do not list
157:, family Plectronoceratidae, or the
14:
1:
350:
334:Cambrian genus extinctions
165:in the Ellesmoerocatidae.
44:Scientific classification
42:
23:
329:Cambrian animals of Asia
171:has a small, marginal
291:Paleobiology Database
29:Temporal range: Late
79:Plectronoceratoidea
198:Shungtangendoceras
191:Fengshan Formation
187:Shungtangendoceras
169:Shungtangendoceras
163:Shungtangendoceras
135:Shangtungendoceras
324:Cephalopod genera
319:Cambrian molluscs
306:
305:
241:Shantungendoceras
233:Taxon identifiers
140:plectronoceratoid
131:
130:
120:Shungtangenoceras
25:Shantungendoceras
16:Genus of molluscs
341:
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181:Early Ordovician
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159:Ellesmerocerida
155:Plectronocerida
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17:
12:
11:
5:
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147:Upper Cambrian
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106:incertae sedis
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92:incertae sedis
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138:is a conical
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35:Trempealeauan
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74:Superorder:
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67:Cephalopoda
313:Categories
204:References
151:endoceroid
143:cephalopod
256:Q16992531
177:endocones
173:siphuncle
145:from the
126:Sun, 1937
50:Kingdom:
250:Wikidata
100:Family:
55:Animalia
31:Cambrian
283:1210883
270:4627849
114:Genus:
86:Order:
62:Class:
296:12419
278:IRMNG
265:GBIF
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33:(
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