A giant stem-group chaetognath
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A giant stem-group chaetognath. / 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.
In: Science Advances, Vol. 10, No. 1, eadi6678, 2024.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - A giant stem-group chaetognath
AU - Park, Tae-Yoon S.
AU - Nielsen, Morten Lunde
AU - Parry, Luke A.
AU - Sørensen, Martin Vinther
AU - Lee, Mirinae
AU - Kihm, Ji-Hoon
AU - Ahn, Inhye
AU - Park, Changkun
AU - de Vivo, Giacinto
AU - Smith, M. Paul
AU - Harper, David A. T.
AU - Nielsen, Arne T.
AU - Vinther, Jakob
PY - 2024
Y1 - 2024
N2 - Chaetognaths, with their characteristic grasping spines, are the oldest known pelagic predators, found in the lowest Cambrian (Terreneuvian). Here, we describe a large stem chaetognath, Timorebestia koprii gen. et sp. nov., from the lower Cambrian Sirius Passet Lagerstätte, which exhibits lateral and caudal fins, a distinct head region with long antennae and a jaw apparatus similar to Amiskwia sagittiformis. Amiskwia has previously been interpreted as a total-group chaetognathiferan, as either a stem-chaetognath or gnathostomulid. We show that T. koprii shares a ventral ganglion with chaetognaths to the exclusion of other animal groups, firmly placing these fossils on the chaetognath stem. The large size (up to 30 cm) and gut contents in T. koprii suggest that early chaetognaths occupied a higher trophic position in pelagic food chains than today.
AB - Chaetognaths, with their characteristic grasping spines, are the oldest known pelagic predators, found in the lowest Cambrian (Terreneuvian). Here, we describe a large stem chaetognath, Timorebestia koprii gen. et sp. nov., from the lower Cambrian Sirius Passet Lagerstätte, which exhibits lateral and caudal fins, a distinct head region with long antennae and a jaw apparatus similar to Amiskwia sagittiformis. Amiskwia has previously been interpreted as a total-group chaetognathiferan, as either a stem-chaetognath or gnathostomulid. We show that T. koprii shares a ventral ganglion with chaetognaths to the exclusion of other animal groups, firmly placing these fossils on the chaetognath stem. The large size (up to 30 cm) and gut contents in T. koprii suggest that early chaetognaths occupied a higher trophic position in pelagic food chains than today.
U2 - 10.1126/sciadv.adi6678
DO - 10.1126/sciadv.adi6678
M3 - Journal article
C2 - 38170772
AN - SCOPUS:85181768407
VL - 10
JO - Science advances
JF - Science advances
SN - 2375-2548
IS - 1
M1 - eadi6678
ER -
ID: 380736227