- however, has been the
nature of the
preoral region. The
obvious contradiction between a
theory that no-
preoral structures are segmental, and evidence...
- in
these species, the
chelicerae and the
bases of the
pedipalps form a
preoral cavity that
holds the food they are processing. The
stomach in the cephalothorax...
-
towards the head. Its
snout is
moderately long, bell-shaped, and broad; the
preoral snout is
about 7% to 8% of its
total length. It has
large gill slits, rather...
-
scorpions and
almost all
spiders are
predators that "pre-process" food in
preoral cavities formed by the
chelicerae and the
bases of the pedipalps. However...
-
difficult to ****ess in the
wider picture.
Trilobites had a
single pair of
preoral antennae and
otherwise undifferentiated biramous limbs (two,
three or four...
- posteriorly). Mite
digestive systems have
salivary glands that open into the
preoral space rather than the foregut. Most
species carry two to six
pairs of salivary...
-
molecular studies. A 2020
study found numerous characters of the eye and
preoral region suggesting that the
closest relatives to
crown myriapods are the...
-
through a
gastrula or even a
blastula stage. New
larvae can
develop from the
preoral hood (a
mound like
structure above the mouth), the side body wall, the...
-
separated lobes, two
anterior and two posterior,
which lie near the mouth. The
preoral zone
contains a
group of
sensor cells with
ciliated pits
organized in long...
-
formed by
first maxillae in
diplopoda forming the gnathochilarium. The
preoral cavity so-formed
contains paired mandibles and any
maxillae which are present...
