From: Fin modules: an evolutionary perspective on appendage disparity in basal vertebrates
Terms used in this paper | Definition | Other terms that have been used |
---|---|---|
Median ventral fin | An unpaired ventral finfold that can be inserted either anteriorly (e.g., some Myxiniformes) or posteriorly to the anus, and anteriorly to the anal fin when it is present (e.g., some Stomiidae, Paralepididae and Phallostethidae (Teleostei)) | Preanal finfold (or skinfold), ventral adipose fin |
Ventrolateral paired fins | Ventrolaterally positioned fins or fin supports placed along the trunk that are generally long-based and that are of uncertain homology to the pectoral and/or pelvic fins | Ventrolateral finfolds, intermediate spines, prepelvic spines |
Pectoral fins | Short-based paired fins inserted on the thorax close to the gill openings | Suprabranchial fins, paired flaps, pectoral flaps, pectoral swimming appendages |
Pelvic fins | Ventrally inserted short-based paired fins, always located anteriorly to the anus/cloaca | Ventral fins |
Dorsal fin | Fins located on the dorsal midline of the body, between the head and the tail | Â |
Anal fin | Fins located on the ventral midline between the anus (or cloaca) and the tail | Â |
Adipose fin | A small non-rayed fin usually located medially between the dorsal and caudal fins; this median fin is present among several groups of ostariophysans and basal euteleosts | Fatty fin, dorsal organ, dorsal filament |
Caudal fin | The caudal fin is located at the extremity of the tail | Tail fin |