-
Cyclostomi,
often referred to as
Cyclostomata /sɪkloʊˈstɒmətə/, is a
group of
vertebrates that
comprises the
living jawless fishes: the
lampreys and hagfishes...
-
related to each
other than to
jawed vertebrates, thus
forming the
clade Cyclostomi. The oldest-known stem
group hagfish are
known from the Late Carboniferous...
- smelling,
which can also be
referred to as
nostrils (with the
exception of
Cyclostomi,
which have just one nostril). In humans, the
nasal cycle is the normal...
- more
closely related to each
other than to
jawed fish,
forming the
clade Cyclostomi. The
oldest fossil agnathans appeared in the Cambrian, and two groups...
-
Cyclostomi Gnathostomata 440 mya...
- classes:
Agnatha or
jawless fish,
which include: †Conodonta †Ostracodermi
Cyclostomi (hagfish and lampreys)
Gnathostomata or
jawed vertebrates,
which include:...
- and fishes.
Dumeril (1806)
grouped hagfishes and
lampreys in the
taxon Cyclostomi,
characterized by
horny teeth borne on a tongue-like apparatus, a large...
-
Clade Order Family Diadromous Anadromous Catadromous Amphidromous Cyclostomi Lampreys Geotriidae 1 1
Mordaciidae 2 2
Petromyzontidae 8 8
Chondrostei Acipenseriformes...
-
jawless fish, than they are to
jawed vertebrates,
forming the
superclass Cyclostomi. The
oldest fossils of stem-group
lampreys are from the
latest Devonian...
- Gr**** for "round mouth") used in a few
different senses: for the
taxon Cyclostomi,
which comprises the
extant jawless fishes: the
hagfish (Myxini) and the...