Definition of Rhachidian. Meaning of Rhachidian. Synonyms of Rhachidian

Here you will find one or more explanations in English for the word Rhachidian. Also in the bottom left of the page several parts of wikipedia pages related to the word Rhachidian and, of course, Rhachidian synonyms and on the right images related to the word Rhachidian.

Definition of Rhachidian

Rhachidian
Rhachidian Rha*chid"i*an, a. Of or pertaining to the rhachis; as, the rhachidian teeth of a mollusk.

Meaning of Rhachidian from wikipedia

- radula is heterodont, also known as heteroglossan, in which the middle or rhachidian tooth in each array has multiple cusps and the lateral teeth are unicuspid...
- The jaws are developed or absent. The radula is rhipidoglossate. The rhachidian teeth are always present and well-developed. The lateral teeth generally...
- and the shape of the teeth agrees with that of the known species. The rhachidian tooth has a subquadrate body, narrower in front, with a concave upper...
- (Geb. der Schnecken, ii, pi. 20, fig. 7), except that the bases of the rhachidian and lateral teeth are subcircular, and on a few of the scythe-shaped cusps...
- It is closely applied to the s****. The long radula has a long, narrow rhachidian tooth. It is lanceolate with its tip narrowand recurved. There are 26...
- the median rows, and cross even the uncini of the opposite side. The rhachidian or median tooth has a subquadrate basal part, with rounded, convex posterior...
- 26 rows of teeth and 7 median rows, with a large number of uncini. The rhachidian tooth has a subquadrate body with winged sides and a long triangular cusp...
- perhaps by erosion. The inside of the s**** has a smooth surface. The rhachidian tooth of the radula is elongate with convex sides. It has no reflected...
- radula have the formula 120 . 2 . 8 . 1 . 8 . 2 . 120 (130 . 1 . 130). The rhachidian tooth is tricuspid. The eight inner laterals are bicuspid and broad, forming...
- central part are very thin and transparent, without distinct cusps; the rhachidian tooth (R) is broadly winged, bow-shaped, at its upper part it is thickened...