rhomboid scale

rhomboid scale
ganoid scale (a non-overlapping or partially-overlapping scale, often rhomboidal in shape, with thick outer ganoine layer (enamel-like substance), a middle layer of dentine and an inner dermal, cosmine bony layer. Grows by addition of material above and below, e.g. in Lepisosteidae, Amiidae and Polypteridae. Lepisosteidae have lost the dentine layer. The scales of Lepisosteidae are called lepisosteoid scales as distinct from paleaoniscoid scales of Brachiopterygii)

Dictionary of ichthyology. 2009.

Игры ⚽ Поможем написать курсовую

Look at other dictionaries:

  • rhombic scale — rhomboid scale …   Dictionary of ichthyology

  • India — /in dee euh/, n. 1. Hindi, Bharat. a republic in S Asia: a union comprising 25 states and 7 union territories; formerly a British colony; gained independence Aug. 15, 1947; became a republic within the Commonwealth of Nations Jan. 26, 1950.… …   Universalium

  • chondrostean — ▪ fish Introduction       any member of a group of primitive ray finned bony fishes (bony fish) that make up one of the three major subdivisions of the superclass Actinopterygii, the other two being the holosteans (holostean) and the teleosts… …   Universalium

  • Vehicles of the Imperial Guard (Warhammer 40,000) — This is a list of vehicles used by the Imperial Guard in the Warhammer 40,000 universe. While lacking the more technologically advanced vehicles available to the elite branches of the Imperium such as the Inquisition, the Imperial Guard do sport… …   Wikipedia

  • Tanks in World War I — The development of Tanks in World War I began as a solution to the stalemate which trench warfare had brought to the western front. The first prototype of the Mark I tank was tested for the British Army on 8 September 1915. Although initially… …   Wikipedia

  • List of plant morphology terms — Biologists that study plant morphology use a number of different terms to describe plant organs and parts that can be observed with the human eye using no more than a hand held magnifying lens. These terms are used to identify and classify plants …   Wikipedia

  • Glossary of plant morphology terms — Biologists that study plant morphology use a number of different terms to describe plant organs and parts that can be observed with the human eye using no more than a hand held magnifying lens. These terms are used to identify and classify plants …   Wikipedia

  • MASADA — (Heb. מְצָדָה, Meẓadah), Herod s palatial fortress and the last stronghold during the Jewish War against Rome (66–73/74 C.E.). Geography Masada is situated on an isolated rock plateau on the eastern fringe of the Judean Desert near the western… …   Encyclopedia of Judaism

  • History of geometry — Geometry (Greek γεωμετρία ; geo = earth, metria = measure) arose as the field of knowledge dealing with spatial relationships. Geometry was one of the two fields of pre modern mathematics, the other being the study of numbers. Classic geometry… …   Wikipedia

  • Roeboides — Taxobox | name = Roboides regnum = Animalia phylum = Chordata classis = Actinopterygii ordo = Characiformes familia = Characidae subfamilia = Characinae genus = Roeboides genus authority = Günther, 1864 subdivision ranks = Species subdivision =… …   Wikipedia

Share the article and excerpts

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