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Hypothesis of the possible homology between the jaw parts of extant and extinct
Chaetognathifera taxa. Putative homologies between jaw parts have the same color. Questionable, and/or, disputable homologies are in grey. Only the anterior part of each organism is represented. Modified from Bekkouche
269:
as long as half of the body length. The mouth opened below the head, with internal jaw apparatus consisting paired subtriangular elements, blunt anterior elements, and an unpaired anterior, possibly ventral or basal plate. Rows of longitudinal and transverse muscles surround the wide trunk region.
670:
Park, Tae-Yoon S.; Nielsen, Morten Lunde; Parry, Luke A.; Sørensen, Martin
Vinther; Lee, Mirinae; Kihm, Ji-Hoon; Ahn, Inhye; Park, Changkun; De Vivo, Giacinto; Smith, M. Paul; Harper, David A. T.; Nielsen, Arne T.; Vinther, Jakob (2024).
292:
As of
January 2024, 13 known specimens have been assigned to this species, ranging from 2.2 cm to more than 20 cm in body length (the largest specimen had a body length of ~206 mm in addition to 92-mm-long antennae).
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732:"Careful amendment of morphological data sets improves phylogenetic frameworks: re-evaluating placement of the fossil
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The digestive tract terminates at the base of caudal fin. It also has a pair of well-defined ventral
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has a wide body marginally surrounded by continuous rayed fins: a pair of lateral fins and a rounded
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and so on. Some specimens with gut contents suggest it prey on the small and abundant arthropod
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was much larger, up to 20 cm (30 cm when antennae included), and occupied a higher
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that identifies it as a chaetognath, but was probably more basal to modern arrow worms than
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313:. This suggests that back in the Cambrian, chaetognaths constituted an important group of
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640:(beast) which translates to "fear-causing beast". The species name is derived from the
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769:"'Giant' Predatory Worms Lived in Greenland Waters 518 Million Years Ago"
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235:(arrow worm relative) that lived about 520 million years ago, in the
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644:(KOPRI), who has helped with the expeditions to the lagerstätte.
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265:. The anterior region is a short head, bearing a pair of
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A yet-undescribed chaetognath, as of
January 2024, from
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is thought to be one of the earliest examples of an
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730:Bekkouche, Nicolas; GÄ…siorowski, Ludwik (2022).
632:The genus name is derived from the Latin words
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301:Compared to extant chaetognaths, which are
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380:shows the evolutionary relationships of
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833:E5E117F9-E6A9-489B-B5C1-668326BC8BCC
328:. It lived alongside other nektonic
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305:and rarely grow beyond 10 cm,
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239:. Its fossils are known from the
673:"A giant stem-group chaetognath"
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642:Korea Polar Research Institute
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871:Fossil taxa described in 2024
755:10.1080/14772019.2022.2109217
16:Extinct genus of arrow worm
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120:Scientific classification
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384:as in Park et al. 2024.
861:Cambrian invertebrates
734:Amiskwia sagittiformis
698:10.1126/sciadv.adi6678
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866:Sirius Passet fossils
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111:3D reconstruction of
504:"New chaetognath" â€
288:and GÄ…siorowski 2022
804:Timorebestia koprii
689:2024SciA...10I6678P
225:Timorebestia koprii
210:Timorebestia koprii
113:Timorebestia koprii
25:Timorebestia koprii
320:alongside various
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32:Cambrian Stage 3
29:Temporal range:
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683:(1): eadi6678.
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621:Sirius Passet
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366:apex predator
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241:Sirius Passet
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198:Binomial name
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856:Chaetognatha
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777:. Retrieved
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773:Science News
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520:Chaetognatha
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456:Timorebestia
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382:Timorebestia
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362:Timorebestia
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335:Kerygmachela
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322:panarthropod
307:Timorebestia
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297:Paleoecology
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259:Timorebestia
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171:Timorebestia
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157:Chaetognatha
112:
24:
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636:(fear) and
341:Kiisortoqia
254:Description
244:Lagerstätte
233:chaetognath
850:Categories
819:Q124134810
779:2024-01-05
648:References
378:dendrogram
326:radiodonts
303:planktonic
263:caudal fin
230:stem-group
628:Etymology
372:Phylogeny
318:predators
248:Greenland
182:Species:
143:Kingdom:
137:Eukaryota
813:Wikidata
749:: 1–14.
717:38170772
708:10796117
552:Spadella
481:Amiskwia
424:Rotifera
315:nektonic
277:Amiskwia
267:antennae
237:Cambrian
153:Phylum:
147:Animalia
133:Domain:
828:ZooBank
685:Bibcode
535:Sagitta
272:ganglia
207:†
186:†
163:Genus:
715:
705:
638:bestia
518:
353:Isoxys
739:(PDF)
634:timor
516:crown
713:PMID
37:Preęž’
751:doi
703:PMC
693:doi
246:in
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167:â€
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
