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...
- and the shape of the teeth agrees with that of the known species. The rhachidian tooth has a subquadrate body, narrower in front, with concave upper and...
- 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...
- 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...
- about ⅓ mm in breadth. It has about 20 transverse rows of teeth; the rhachidian tooth is broad, depressed quadrangular with rounded upper angles and pointed...
- The jaws are developed or absent. The radula is rhipidoglossate. The rhachidian teeth are always present and well-developed. The lateral teeth generally...
- and visceral hump. digestive system: the radula formula is 57–59×1.1.?; rhachidian tooth with 3–4 denticles per side. reproductive system: the hollow curved...
- horseshoe-shaped and interrupted in front. The radula has a large simple rhachidian tooth with, on each side, two large, simple transverse laterals, followed...
- shape with a common, prominent, spiral sculpture. The radula shows a rhachidian tooth with no basal cusps. Their stomach has a caecal appendix at its...
- 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...