706:
409:
diameter was 7.4 mm (0.29 in), with a range of 4.5β10.0 mm (0.18β0.39 in). Each fossil has two dissimilar surfaces β one smooth with one or rarely two furrows, and one with conspicuous "growth lines", parallel with the outer edge of the fossil. The overall shape is broadly
467:
has been enigmatic since its original discovery. Weller's specimens collected in 1902 are labelled "Fish remains?" in his sister's handwriting, Burlington's specimens are labelled "Cone scales?", and
Belanski described them as "apparently dermal ossifications of some fish". While
256:. It was first collected in 1902, but only described in 1975 and the holotype is SUI 34978-91. Each animal appears as a bi-lobed lens up to 11 mm Γ 8 mm (0.43 in Γ 0.31 in), and almost all specimens share the same slight asymmetry. The species is of
395:, respectively. They studied more than 3,200 specimens, many of which were deposited at the University of Iowa's Department of Geology and the University of Cincinnati Geology Museum. They referred to the fossils as "
405:
appears as lenticular (lens-shaped), bilobed fossils, with a size up to 11 mm Γ 8 mm (0.43 in Γ 0.31 in). In a sample of 400 specimens, the
761:
445:. Davis and Semken could not rule out the possibility that the apatite was introduced after deposition, since the shell of an animal similar to
741:
685:
589:
720:
362:. Thousands of specimens have since been collected from the Maple Mill Shale and nearby sites, and two have been found in a well at
756:
746:
540:
Richard Arnold Davis & Holmes A. Semken Jr. (1975). "Fossils of uncertain affinity from the Upper
Devonian of Iowa".
346:
At a similar time to Weller's collections, Charles
Rochester Eastman collected specimens from the Kinderhook Beds at
751:
611:
591:"Horse collars" are for balancing? The function of an enigmatic Devonian fossil re-examined with 3D visualization
388:
351:
297:
673:
199:
639:
289:
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355:
293:
447:
363:
495:
from a
Devonian free-swimming animal rather than an entire organism or the shell of an organism.
620:
559:
392:
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128:
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666:
640:"Type fossil Miscellanea (worms, problematica, conoidal shells, trace fossils) in Field Museum"
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Gerald Glenn Forney, Daniel T. Jenkins & Matthew H. Nitecki (1977).
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410:
symmetrical, but the furrow is almost always on the same side of the "
260:, having been variously thought of as either fish teeth, some sort of
484:
406:
231:
139:
414:" (the cleft between the two halves). Opposite the re-entrant is a "
399:", a name which had been used colloquially among university staff.
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309:
387:
in 1975 by
Richard Arnold Davis and Holmes A. Semken Jr., of the
473:
320:
301:
247:
354:. C. H. Belanski collected specimens 30 years later from the
451:
in the same sediments had been replaced with apatite. No
609:, a new multielement genus of Late Devonian conodont".
208:
186:
165:
487:, and more recent 3D analyses suggest it may be an
418:", which separates two indentations in the margin.
665:
594:. 10th North American Paleontological Convention.
725:Null Hypothesis: The Journal of Unlikely Science
8:
605:Karl M. Chauff & Rex C. Price (1980). "
250:that is the only species within the genus
31:
483:, it cannot be confidently placed in any
535:
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308:Maple Mill Shale appears as a series of
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588:Hegna, Thomas; Snyder, Daniel (2014).
27:Fossil from the Upper Devonian of Iowa
315:which are rich in fossils, including
7:
25:
762:Devonian animals of North America
472:has been interpreted as either a
704:
1:
742:Fossil taxa described in 1975
668:A Pictorial Guide to Fossils
556:10.1126/science.187.4173.251
778:
664:Gerard Ramon Case (1982).
381:in a paper in the journal
230:is an extinct species of
205:
198:
129:Scientific classification
127:
34:
389:University of Cincinnati
284:were first collected by
218:Davis & Semken, 1975
176:Davis & Semken, 1975
18:Gluteus minimus (fossil)
352:Des Moines County, Iowa
292:near Maple Mill on the
757:Late Devonian animals
747:Enigmatic animal taxa
674:Van Nostrand Reinhold
721:"Nutty Nomenclature"
712:Palaeontology portal
455:could be recovered.
356:Lime Creek Formation
258:uncertain affinities
364:Columbus City, Iowa
393:University of Iowa
379:formally described
360:Floyd County, Iowa
323:remains, possible
288:in 1902, from the
276:Collection history
687:978-0-442-22651-0
612:Micropaleontology
550:(4173): 251β254.
429:, comprising 56%
421:The specimens of
298:Washington County
223:
222:
16:(Redirected from
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752:Devonian animals
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40:Temporal range:
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619:(2): 177β188.
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306:Upper Devonian
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280:Specimens of
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42:Late Devonian
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425:are made of
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341:scolecodonts
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453:amino acids
448:Bellerophon
441:, and 1.5%
370:Description
333:brachiopods
266:brachiopods
262:fish scales
736:Categories
676:. p.
653:(1): 1β41.
499:References
481:brachiopod
423:G. minimus
412:re-entrant
348:Burlington
329:gastropods
325:sporocarps
282:G. minimus
645:Fieldiana
493:statolith
435:phosphate
317:conodonts
244:Famennian
234:from the
182:Species:
135:Kingdom:
121:Famennian
572:17838783
439:fluoride
391:and the
337:bivalves
270:otoliths
240:Frasnian
147:Phylum:
140:Animalia
117:Frasnian
727:. 2007.
647:Geology
625:1485437
564:1739069
543:Science
489:otolith
437:, 3.5%
427:apatite
416:salient
384:Science
253:Gluteus
170:Gluteus
161:Genus:
684:
623:
570:
562:
485:phylum
433:, 39%
407:median
339:, and
313:lenses
304:. The
232:animal
621:JSTOR
560:JSTOR
479:or a
477:tooth
310:shale
268:, or
246:) of
682:ISBN
568:PMID
474:fish
377:was
321:fish
302:Iowa
248:Iowa
56:Preκ
552:doi
548:187
491:or
358:in
738::
723:.
680:.
678:47
672:.
651:37
649:.
642:.
617:26
615:.
580:^
566:.
558:.
546:.
506:^
366:.
350:,
343:.
335:,
331:,
327:,
319:,
300:,
296:,
272:.
264:,
106:Pg
50:Ma
44:,
690:.
627:.
574:.
554::
242:-
238:(
209:β
187:β
166:β
119:-
111:N
101:K
96:J
91:T
86:P
81:C
76:D
71:S
66:O
61:κ
20:)
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