opisthure

opisthure
1) the tip of the vertebral column which protrudes beyond the caudal fin, e.g. in larval Elasmobranchii
2) urostyle (1) the small upturned posterior tip of the vertebral column, generally formed of a slender, pointed rod of cartilage, or fused vertebrae and associated elements (in homocercal caudal fins of Teleostomi) and (2) the fan-like series of bones articulating with the last true vertebra, including preural centra, ural centra, epurals and hypurals. Counted as one vertebra in some vertebral counts, not counted in others

Dictionary of ichthyology. 2009.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • opisthure — Ichthyol. (ˈɒpɪsθjʊə(r)) [f. opistho + Gr. οὐρά tail.] The posterior end of the caudal axis in the embryonic stage of some fishes, which is ultimately absorbed into the caudal fin. Hence opisˈthural a., pertaining to the opisthure. Cent. Dict.… …   Useful english dictionary

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”