- the
latter are
indeed chelicerates. On the
other hand,
there are over 77,000 well-identified
species of air-breathing
chelicerates, and
there may be about...
-
Megacheira as
closely related to
chelicerates,
while others recover them as
outside the
group containing Chelicerate and
Mandibulata as stem-group euarthropods...
- to
palps or palpi) are the
secondary pair of
forward appendages among chelicerates – a
group of
arthropods including spiders, scorpions,
horseshoe crabs...
-
distinguished from
other groups of arthropods, such as insects,
myriapods and
chelicerates, by the
possession of
biramous (two-parted) limbs, and by
their larval...
- annelids.
Median ocelli are
present in
chelicerates and mandibulates;
lateral ocelli are also
present in
chelicerates. No
fossil organisms have been identified...
- true spiders, nor even arachnids,
their traditional classification as
chelicerates would place them
closer to true
spiders than to
other well-known arthropod...
- The term
telson is
widely used for the
caudal spine of some
chelicerates. The
chelicerate telson can be
clearly seen in a
number of
fossil species (like...
- spiders).
Chelicerates are in part
defined by
possessing chelicerate appendages,
although crustaceans also
possess chelate appendages.
Chelicerates are more...
-
early stage of development, so that
chelicerates lack the
antennae typical of most arthropods. In fact,
chelicerates' only
appendages ahead of the mouth...
-
arthropods are a
monophyletic group and are
divided into
three main clades:
chelicerates (including arachnids),
pancrustaceans (the
paraphyletic crustaceans plus...
