252:
124:
106:
366:. However, it is most likely avian because it has an unornamented, thin shell that probably has three structural layers, a combination of characters unique to bird eggs. Also, the bones found associated with the eggs seem to be avian.
338:
The eggs are interesting because of the possible presence of an external zone, the outer layer of the eggshell which is rare outside of bird eggs. If correctly interpreted, this would prove that
279:
of at least four eggs and associated adult remains (probably representing the parent). Several other fossil eggs are also known. The egg clutches are tightly packed together, like
522:
293:
birds. However, the eggs themselves are quite different from
Troodontids, and the associated skeletal remains are similar to the enantiornithine
497:
512:
451:
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eggs by the thick third layer of the shell (possibly representing an external zone). It lacks shell ornamentation, unlike
507:
502:
343:
123:
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in fact represents bird eggs. However, it cannot be proven to have an external layer until its shell is examined by
378:
eggs suggests intense parental care. The tight egg clutches show that the incubation methods differed from that of
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performed by
Varracchio and Barta (2015) were inconclusive as to whether it represented a bird or a non-avian
492:
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202:
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331:
218:
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32:
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135:
481:
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63:
315:
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231:
222:
229:, and were described as "larger avian eggs". They were considered classified as
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38:
310:
286:
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118:
83:
48:
88:
105:
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320:
313:. At 70 mm long and 32 mm across, they are larger than both oospecies of
239:, and reclassified the "larger avian eggs" into an entirely new oogenus,
78:
73:
58:
53:
43:
187:
93:
68:
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Laura E. Wilson, Karen Chin, Frankie D. Jackson, and Emily S. Bray.
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probably sat on top of largely buried eggs. It is unknown whether
250:
319:, and more elongated. It can be distinguished from all non-avian
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eggs are quite different from all other known fossil eggs of the
423:
Revisiting Sabath's "Larger Avian Eggs" from the Gobi
Cretaceous
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in 1996 by
Mikhailov. In 2015, Varracchio and Barta redefined
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eggs (then unnamed) were described as bird eggs. The three
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was incubated by the father or the mother of the eggs.
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eggs, in contrast to the loosely scattered nests of
166:
447:
Upper
Cretaceous amniotic eggs from the Gobi Desert
441:
439:
437:
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8:
104:
20:
421:Varricchio, D.J. and D.E. Barta (2015). "
354:When they were first discovered in 1991,
399:
225:in an assemblage of fossil eggs in the
470:UCMP Online Exhibits: Fossil Eggshell
466:II. Eggshell morphology and structure
7:
374:The association of adult bones with
382:. Like Troodontids, the parents of
14:
523:Fossil parataxa described in 2015
122:
1:
498:Late Cretaceous birds of Asia
452:Acta Palaeontologica Polonica
427:Acta Palaeontologica Polonica
344:scanning electron microscopy
539:
217:were first discovered in
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119:Egg fossil classification
117:
112:
103:
23:
264:
190:of highly distinctive
513:Barun Goyot Formation
360:phylogenetic analyses
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203:Barun Goyot Formation
113:Two partial cluthces
16:Oogenus of fossil egg
445:Sabath, K. (1991). "
332:Macroelongatoolithus
301:Nanantius valifanovi
508:Fossils of Mongolia
503:Cretaceous Mongolia
199:Djadokhta Formation
265:
232:Gobioolithus major
296:Gobipteryx minuta
179:
178:
530:
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258:egg next to two
196:Upper Cretaceous
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35:
33:Upper Cretaceous
29:Temporal range:
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518:Djadochta fauna
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326:Elongatoolithus
291:enantiornithine
282:Prismatoolithus
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493:Campanian life
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137:incertae sedis
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370:Palaeobiology
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269:type specimen
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205:in Mongolia.
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34:
26:
22:
19:
469:
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455:36: 151β192.
450:
429:60(1):11-25.
426:
387:
384:Styloolithus
383:
379:
376:Styloolithus
375:
373:
356:Styloolithus
355:
353:
350:Parataxonomy
340:Styloolithus
339:
337:
330:
324:
316:Gobioolithus
314:
306:
305:
300:
294:
280:
275:is a fossil
273:Styloolithus
272:
266:
261:Gobioolithus
259:
256:Styloolithus
255:
241:Styloolithus
240:
236:
230:
223:Karol Sabath
215:Styloolithus
214:
213:The eggs of
212:
183:Styloolithus
182:
181:
180:
170:
169:
152:Styloolithus
151:
150:
136:
25:Styloolithus
24:
18:
488:Egg fossils
247:Description
227:Gobi desert
482:Categories
394:References
388:S. sabathi
380:Gobipteryx
311:Cretaceous
307:S. sabathi
287:Troodontid
192:fossil egg
171:S. sabathi
159:Oospecies
132:Oofamily:
194:from the
144:Oogenus:
364:theropod
321:dinosaur
237:G. major
201:and the
209:History
188:oogenus
277:clutch
186:is an
329:and
285:and
267:The
219:1991
39:Preκ
449:".
303:).
271:of
221:by
484::
468:.
434:^
425:"
402:^
346:.
335:.
299:(=
243:.
89:Pg
167:β
148: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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