10.5061/DRYAD.NH74KG8
Capobianco, Alessio
0000-0002-6096-3875
University of Michigan–Ann Arbor
Foreman, Ethan
University of Michigan–Ann Arbor
Friedman, Matt
0000-0002-0114-7384
University of Michigan–Ann Arbor
A Paleocene (Danian) marine osteoglossid (Teleostei, Osteoglossomorpha)
from the Nuussuaq Basin of Greenland, with a brief review of Palaeogene
marine bonytongue fishes
Dryad
dataset
2019
marine fauna
K–Pg extinction
Osteoglossiformes
Palaeogene
Paleocene
early Palaeogene
Osteoglossidae indet.
Danian
Osteoglossidae
Teleostei
Osteoglossomorpha
2019-11-21T00:00:00Z
2019-11-21T00:00:00Z
en
https://doi.org/10.1002/spp2.1291
15970887092 bytes
2
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
The early Palaeogene represents a key interval in the evolution of modern
marine fish faunas. Together with the first appearances of many familiar
fish lineages characteristic of contemporary marine environments, early
Palaeogene marine deposits worldwide feature the occurrence of
osteoglossid bonytongues. Their presence in marine rocks is surprising, as
these fishes are strictly associated with freshwater environments in
modern settings and other parts of the fossil record. Despite its possible
relevance to faunal recovery after the K–Pg extinction, this marine
osteoglossid radiation is relatively understudied. Here we describe an
osteoglossid specimen from marine Danian deposits of western Greenland
(Eqalulik Formation, northern Nuussuaq Peninsula). It consists of
disarticulated cranial, pectoral and vertebral material belonging to a
relatively large-bodied predator, similar to the widespread †Brychaetus
but with some distinctive features. This specimen expands the geographic
range of extinct osteoglossids to the Arctic and represents one of the
earliest records of this group in marine deposits. We review other fossil
occurrences of marine osteoglossids, highlighting temporal and
biogeographic patterns that characterize their rise, diversification and
sudden disappearance in the middle Eocene. It is likely that the
transition from freshwater to marine environments occurred around the K–Pg
boundary, possibly related to ecological replacement of predatory fish
lineages that went extinct at the end of the Cretaceous. Further study of
the Eqalulik Formation fauna could yield additional insight into the
consequences of the end-Cretaceous extinction on marine fish evolution and
on the assembly of modern marine faunas.
3D bone models from NHMD 72014 A.ply files of individual bones preserved
in specimen no. NHMD 72014 A and segmented using Mimics v.
19.0GreenlandOsteoglossidLeft_plyFiles.zip3D bone models from NHMD 72014
B.ply files of individual bones preserved in specimen no. NHMD 72014 B and
segmented using Mimics v. 19.0GreenlandOsteoglossidRight_plyFiles.zipμCT
data for NHMD 72014 A.7z file containing micro-computed tomography data
for specimen NHMD 72014 A as a .mcs file (can be opened by the program
Mimics). Voltage: 210 kV; current: 220 μA; filter: 2.5 mm copper;
reflection target: tungsten; effective pixel size: 92 μm; scanning
facility: University of Michigan
CTEES.GreenlandOsteoglossidLeft_NHMD72014A.7zμCT data for NHMD 72014 B.7z
file containing micro-computed tomography data for specimen NHMD 72014 B
as a .mcs file (can be opened by the program Mimics). Voltage: 210 kV;
current: 220 μA; filter: 2.5 mm copper; reflection target: tungsten;
effective pixel size: 92 μm; scanning facility: University of Michigan
CTEES.GreenlandOsteoglossidRight_NHMD72014B.7zμCT data as DICOM stack for
NHMD 72014A.7z file containing micro-computed tomography data for specimen
NHMD 72014 A as a DICOM image stack. Voltage: 210 kV; current: 220 μA;
filter: 2.5 mm copper; reflection target: tungsten; effective pixel size:
92 μm; scanning facility: University of Michigan
CTEES.GreenlandOsteoglossidLeft_NHMD72014A_dcm.7zμCT data as DICOM stack
for NHMD 72014B.7z file containing micro-computed tomography data for
specimen NHMD 72014 B as DICOM image stack. Voltage: 210 kV; current: 220
μA; filter: 2.5 mm copper; reflection target: tungsten; effective pixel
size: 92 μm; scanning facility: University of Michigan
CTEES.GreenlandOsteoglossidRight_NHMD72014B_dcm.7z
Nuussuaq
North Atlantic
Arctic
Kangilia
Greenland