341:, is strongly divided by two deep furrows that merge when crossing the midline. The large and inflated anterior lobe is isolated from border furrow. Behind it is a pair of small, separated, subtriangular lobes. The posterior part of the glabella is large and carries an inflated spine that is directed upwards and backwards. Genal spines are present. The axis of the pygidium (or rhachis) has nine rings that are strongly inflated, with the second ring carrying a vertical spine. The border surrounding the pygidium is defined by a deep furrow, is narrow, and lacks spines.
108:
640:
254:
Rasetti, 1966, from his locality cs-4 in limestone beds which form several outcrops on a hillside at
Griswold Farm, about 1 mile southeast of North Chatham, Columbia County, New York State, USA; the associated faunule is referred to as the
477:
KOBAYASHI T. 1943. Brief notes on the
Eodiscids 1, their classification with a description of a new species and a new variety. Proceedings of the Imperial Academy, Tokyo, Volume 19, pp. 37-42.
586:
235:. = late Lower Cambrian Stage 4 (upper of two stages subdividing the un-named Series 2); the upper Botomian boundary corresponds to base of the Middle Cambrian,
730:
231:
Rasetti, 1966, is a genus of
Eodiscinid trilobite belonging to the family Weymouthiidae Kobayashi (1943), Order Agnostida Salter (1864). It lived during the
435:
681:
573:
710:
468:
RASETTI, F., 1966. New Lower
Cambrian trilobite faunule from the Taconic sequence of New York. Smithsonian Miscellaneous Collections 148, 1-52.
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SALTER, J. W. 1864: On some new fossils from the
Lingula-flags of Wales. Quarterly Journal of the Geological Society of London, 20, 233–241.
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725:
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Treatise on
Invertebrate Paleontology. Part O, Revised, Volume 1 – Trilobita – Introduction, Order Agnostida, Order Redlichiida
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is known from the Lower
Cambrian of the United States (unnamed formation, East Chatham Quad, Columbia County, New York State
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has no eyes. Its cephalic border is strongly convex, with a pair of lateral marginal spines. The entire exoskeleton of
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faunule due to the nominate species being one of the most common and characteristic trilobites.
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501:"East Chatham Quad, unnamed fm., NY (Cambrian of the United States) (trilobite)"
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is covered in granules. The central raised area of the cephalon, called the
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is unknown but all weymouthiids where it is known have 3 thoracic segments.
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436:"A compendium of fossil marine animal genera (Trilobita entry)"
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321:) are approximately the same size (or
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731:Cambrian trilobites of North America
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634:
309:Like in all Agnostida, the body of
440:Bulletins of American Paleontology
313:is diminutive, the headshield (or
14:
352:occurs in association with other
638:
1:
711:Cambrian trilobites of Europe
721:Fossils of the United States
654:. You can help Knowledge by
524:WHITTINGTON, H. B. (1997).
16:Extinct genus of trilobites
757:
736:Cambrian genus extinctions
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726:Animals described in 1966
398:, and several species of
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123:Scientific classification
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716:Fossils of Great Britain
499:Paleobiology Database.
650:-related article is a
410:Walcott, 1916 (Family
613:Paleobiology Database
446:: 560. Archived from
434:SEPKOSKI, J. (2002).
317:) and tailshield (or
404:Billings, 1861, and
350:Acimetopus bilobatus
257:Acimetopus bilobatus
252:Acimetopus bilobatus
215:Acimetopus bilobatus
116:Acimetopus bilobatus
450:on 5 September 2006
285: /
219:Rasetti, 1966
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600:Open Tree of Life
542:Taxon identifiers
289:42.400°N 73.500°W
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706:Agnostida genera
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383:Leptochilodiscus
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29:Temporal range:
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701:Weymouthiidae
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656:expanding it
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504:. Retrieved
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452:. Retrieved
448:the original
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263:Distribution
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247:Type species
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208:Type species
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193:
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18:
506:19 December
412:Dorypygidae
389:Serrodiscus
371:Bathydiscus
356:including (
305:Description
292: /
239:Series and
237:Miaolingian
695:Categories
550:Acimetopus
454:12 January
418:References
395:Calodiscus
377:Bolboparia
335:Acimetopus
331:Acimetopus
311:Acimetopus
268:Acimetopus
228:Acimetopus
195:Acimetopus
146:Arthropoda
32:Botomian (
25:Acimetopus
648:Agnostida
401:Olenellus
359:Acidiscus
323:isopygous
170:Agnostida
158:Trilobita
129:Kingdom:
34:Olenellus
565:Q4674155
559:Wikidata
339:glabella
319:pygidium
315:cephalon
177:Family:
141:Phylum:
134:Animalia
605:5130534
592:1120296
579:4639305
345:Ecology
325:). The
280:73°30′W
277:42°24′N
243:stage.
241:Wuliuan
189:Genus:
165:Order:
153:Class:
407:Bonnia
365:Analox
327:thorax
36:-zone)
646:This
618:19170
587:IRMNG
652:stub
574:GBIF
508:2012
456:2008
41:PreꞒ
444:364
414:).
392:),
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362:,
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658:.
528:.
510:.
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96:N
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
