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...

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...

Anaspidomorphi † Cephalaspidomorphi † Conodonta † Cyclostomi Myllokunmingiida † Pteraspidomorphi † Thelodonti † Gnathostomata...

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...

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...

Greek for "round mouth") used in a few different senses: for the taxon Cyclostomi, which comprises the extant jawless fishes: the hagfish (Myxini) and the...

jawless fish, than they are to jawed vertebrates, forming the superclass Cyclostomi. The oldest fossils of stem-group lampreys are from the latest Devonian...