417:, the surface thence to the upper peripheral carina regularly oblique, with a single carinule at lower two-fifths; on the larger whorls a few other very minute and inconspicuous threads can be observed; surface below the lower peripheral carina, with two carinae, the uppermost interval thus formed much the larger, both with an intermediate central and feeble thread; lyrae on the body whorl moderately coarse, well separated and only occasionally with intermediate threads. Length of a specimen of 6 body whorls, 22 mm.; width, 6 mm.
49:
435:
carina cylindric, with a similar carina a little below its middle and another near the lower edge; space between the peripheral carina and the one next below with a finer carina a little below its middle. Length of a fragment consisting of the embryo and 4 spire whorls, 5.6 mm.; width, 3 mm. Lower
Claiborne Eocene of St. Maurice, La. ...
330:, but the peculiar narrow elevated embryo, perfectly smooth throughout and without riblets, higher shoulder angle and oblique fasciolar surface, less developed subsutural collar and some other differential characters, will readily serve to separate the two genera, which are perhaps the most characteristic and abundant forms of the
434:
Peripheral carina single, narrow but strongly elevated, at the middle; subsutural carina, fine; surface thence to the periphery regularly oblique and covered with rather close-set, fine but sharply elevated threads, the one nearest the peripheral carina much the largest; surface below the peripheral
364:
3 — Peripheral carina at the middle of the whorls, apparently duplex, coarse but only moderately elevated; between it and the base there is another similar double carina; slightly above it, at the lower part of the oblique fasciolar surface, there is a fine spiral carina; declivous space thence to
318:, strongly elevated and smooth throughout, the subsutural collar smaller and less developed, the fasciolar surface thence obliquely ascending but straight in profile or nearly so to the obtusely angulate periphery, on and below which the spirals become coarser. The
395:
4 — Moderately stout, the subsutural collar small; surface thence regularly ascending to the crenulate periphery and having two or three coarse but feeble spiral lines; surface below the periphery on the
590:
R. L. Squires. 2001. Additions to the Eocene megafossil fauna of the Llajas
Formation, Simi Valley, southern California. Contributions in Science (Natural History Museum of Los Angeles County) 489:1-40
413:
5 — Peripheral carina double, its upper carinule smaller and less prominent than the lower, the latter a little below the middle; subsutural carina unusually strong, at some distance below the
361:
Small species, the periphery more obtusely angulate, more feebly carinate and distinctly below the middle of the whorls; all the whorls apparently crenulate on the periphery. ... 4
587:
P. Jeffery and S. Tracey. 1997. The Early Eocene London Clay
Formation mollusc fauna of the former Bursledon Brickworks, Lower Swanwick, Hampshire. Tertiary Research 17(3-4):75-137
378:
Peripheral carina well above the middle of the whorls; between it and the base there are two carinae, which are apparently smaller than the peripheral and less elevated.
744:
665:
739:
652:
734:
400:
whorls with two rather coarse and widely spaced carinules in low relief; below these on the body whorl the surface is closely, evenly lyrate.
729:
475:
290:
150:
516:
724:
48:
341:. The species are more numerous than those of the preceding genus, those known to me being outlined as follows: —
603:
593:
J. J. Sepkoski. 2002. A compendium of fossil marine animal genera. Bulletins of
American Paleontology 363:1-560
501:
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http://paleodb.org/cgi-bin/bridge.pl?action=displayCollectionDetails&collection_no=7438
484:. Transactions of the Academy of Science of St. Louis, volume 14, number 5, pages 123−170.
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100:
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Mr. Aldrich mentions no crenulation on the periphery of the nepionic whorls of
345:
90:
274:
244:
173:
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34:
481:
Notes on the
Pleurotomidae with description of some new genera and species
637:
351:
Peripheral carina devoid of any trace of crenulation at any point. ... 5
130:
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80:
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2 — Larger species, the peripheral carina at or above the middle of the
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the fine subsutural collar with two or three very fine spiral threads.
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30:
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This article incorporates public domain text from reference.
344:
Peripheral carina crenulate, at least on the small upper
358:, crenulate on the small or nepionic whorls only. ... 3
627:
559:"London Clay Gastropods - Scaphopods - Cephalopod"
584:(Smithsonian Handbooks) by David Ward (Page 131)
298:
450:, but these are said to exist by Prof. Harris.
348:, situated at the middle and subduples. ... 2
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20:
296:Casey's original text reads as follows:
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467:
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745:Taxa named by Thomas Lincoln Casey Jr.
540:
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337:, — and impart a marked difference in
740:Paleogene gastropods of North America
7:
14:
47:
735:Paleogene gastropods of Europe
1:
730:Paleogene gastropods of Asia
289:was originally described by
16:Extinct genus of gastropods
761:
312:is much narrower than in
44:Scientific classification
42:
23:
404:ferruginous sand . ...
256:Eosurcula praeattenuata
502:Fossilworks: Eosurcula
488:is described at pages
452:
692:Paleobiology Database
610:Paleobiology Database
291:Thomas Lincoln Casey
281:Original description
226:Eosurcula inconstans
369:, Caldwell Co. ...
204:Eosurcula capayana
725:Eocene gastropods
707:
706:
679:Open Tree of Life
621:Taxon identifiers
539:Missing or empty
326:are nearly as in
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37:(61.7 to 37.2 Ma)
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29:Temporal range:
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419:Lower Claiborne
402:Upper Claiborne
332:Lower Claiborne
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271:(Edwards, 1857)
267:Eosurcula stena
215:Eosurcula cohni
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101:Caenogastropoda
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566:. Retrieved
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541:|title=
520:. Retrieved
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315:Protosurcula
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514:paleodb.org
476:Casey T. L.
425:, Ala. ...
407:pulcherrima
386:, Ala. ...
346:body whorls
230:Cooper 1894
714:Categories
455:References
438:helicoidea
421:Eocene of
382:Eocene of
241:Gabb, 1860
208:Vokes 1939
97:Subclass:
91:Gastropoda
629:Eosurcula
605:Eosurcula
486:Eosurcula
310:Eosurcula
302:Eosurcula
293:in 1904.
287:Eosurcula
275:Hampshire
260:Gabb 1868
245:Bartonian
176:from the
174:gastropod
162:Eosurcula
145:Eosurcula
67:Kingdom:
61:Eukaryota
35:Paleocene
25:Eosurcula
720:Turridae
644:Q3784865
638:Wikidata
568:23 April
532:cite web
522:23 April
428:concinna
380:Lignitic
320:aperture
305:n. gen.
131:Turridae
127:Family:
121:Conoidea
81:Mollusca
77:Phylum:
71:Animalia
57:Domain:
684:2912000
671:1054596
658:4603132
608:in the
582:Fossils
447:tuomeyi
441:n. sp.
431:n. sp.
410:Hellp.
389:taomeyi
339:habitus
196:Species
167:extinct
137:Genus:
107:Order:
87:Class:
478:1904.
423:Lisbon
415:suture
392:Aid .
375:Gabb.
372:moorei
356:whorls
335:Eocene
285:Genus
188:, and
186:Europe
178:Eocene
165:is an
153:, 1904
31:Eocene
697:11075
666:IRMNG
492:-147.
398:spire
367:Texas
324:canal
273:from
249:Texas
243:from
170:genus
151:Casey
653:GBIF
570:2009
545:help
524:2009
322:and
182:Asia
490:145
247:in
180:of
172:of
33:to
716::
694::
681::
668::
655::
640::
561:.
536::
534:}}
530:{{
466:^
264:†
253:†
234:†
223:†
212:†
201:†
192:.
184:,
572:.
547:)
543:(
526:.
141:†
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
