-
described species of
galeaspids in at
least 53 genera. If the
families Hanyangaspidae and Xius****aspidae can be
ignored as
basal galeaspids, the rest of Galeaspida...
- evolution. Most of the ostracoderms, such as thelodonts, osteostracans, and
galeaspids, were more
closely related to the
gnathostomes than to the
surviving agnathans...
-
extinct armored fishes called ostracoderms. Most
fossil agnathans, such as
galeaspids, thelodonts, and osteostracans, are more
closely related to vertebrates...
-
dated using conodonts as
index fossils. The
Xiaoxiang fauna also
includes galeaspids,
placoderms and acanthodians.
Guiyu was
described by
Chinese palaeontologist...
- from the Late
Silurian of Canada, Norway, and the U.S.
Tujiaaspis is a
galeaspid agnathan from the
early Silurian (Telychian) of China,
showing origin...
- evolution. Most of the ostracoderms, such as thelodonts,
osteostracans and
galeaspids, were more
closely related to the
gnathostomes than to the
surviving agnathans...
- tail of Tujiaaspis, a
closely related galeaspid,
lacked these structures and was
generally symmetrical.
Galeaspids like
Foxaspis and
Tujiaaspis were likely...
- Most
lingering agnathan (jawless fish) groups, such as osteostracans,
galeaspids, and heterostracans, also went
extinct by the end of the Frasnian. The...
-
preserved complete fossils of
earliest jawed vertebrates, as well as some
galeaspids and eurypterids.
Waukesha Biota (Brandon
Bridge Formation) ~435 Ma Early...
- -R.; Zhu, Y.-A.; Wang, Q.; Wei, G.-B.; Zhu, M. (2024). "A new
genus of
galeaspids (jawless stem-Gnathostomata) from the
early Silurian Chongqing Lagerstätte...
