- In biology, a
rachis /ˈreɪkɪs/ (from the
Ancient Gr****: ῥάχις [rhákhis], "backbone, spine") is a main axis or "shaft". In vertebrates,
rachis can refer...
- Each row of
radular teeth consists of One
central or
median tooth (or
rachidian tooth,
rachis tooth) On each side: one or more
lateral teeth And then...
-
calcitic layer. The
rachidian teeth have
three large cusps but no
marginal cusps,
instead the
outer sides of the
lateral cusps on the
rachidian have a comb-like...
- rhachi(o)-
spine Gr**** ῥάχις (rhákhis),
spine or
backbone rachial, rachialgia,
rachidian,
rachiopathy rhin(o)- of or
pertaining to the nose Gr**** ῥίς, ῥῑνο- (rhís...
-
species possesses a Steoglossan-type radula,
consisting of a
single row of
rachidian (central) teeth. Each
tooth bears multiple small,
sharply pointed denticles...
-
longitudinally crenulated s**** sculpture, and a
broadly triangular central rachidian radular tooth and a lack of
umbilical callus.
Fresh s**** were also found...
-
excavated into a pit for the
reception of the s****-muscle. The
animal has no
rachidian teeth.
Schizoglossa has eggs with a
calcareous surface which lacks cuticle...
-
displaying sculpture that may
persist on
later whorls. They
possess a
rachidian radula.
These snails can be
found worldwide in deep water. Some authors...
-
large apertures, a
concave columella and no
external calcitic layer. The
rachidian teeth have
prominent marginal denticles. The s**** is oblong-oval, the...
- white.
Radular ribbon is robust, long,
about one-fifth the s**** length.
Rachidian tooth is squarish;
basal plate is with pair of
posterior lunule-shaped...
