-
Cyclostome is a
biological term (from the Gr**** for "round mouth") used in a few
different senses: for the
taxon Cyclostomi,
which comprises the extant...
- Cyclostomatida, or
cyclostomata (also
known as
cyclostomes), are an
ancient order of
stenolaemate bryozoans which first appeared in the
Lower Ordovician...
- with jaws (called gnathostomes) than to
cyclostomes.
Biologists historically disagreed on
whether cyclostomes are a clade. The "vertebrate hypothesis"...
- the
evidence provided by
Heimberg et al. and
prepared to
admit that
cyclostomes are, in fact, monophyletic. The
consequence is that they may tell us...
-
large notochord as adults, and pouch-shaped
gills (Marspibranchii).
Cyclostomes were
regarded as
either degenerate cartilaginous fishes or primitive...
-
Gonozooids act as
brood chambers for
fertilized eggs.
Almost all
modern cyclostome bryozoans have them, but they can be hard to
locate on a
colony because...
-
modified into a very long, hair-like
structure is
called a vibraculum. The
cyclostome family Eleidae,
which convergently evolved an
opercular structure during...
-
characterized by the lack of jaws. The
group consists of both
living (
cyclostomes such as
hagfishes and lampreys) and
extinct clades (e.g.
conodonts and...
-
unanimously in
consensus of
cyclostome monophyly, with more
recent work
being directed at
shared microRNAs between cyclostomes and gnathostomes. The current...
-
stellatus on a
cobble from the Kope
Formation in
northern Kentucky with the
cyclostome bryozoan Corynotrypa in the
background Middle Ordovician fossiliferous...
