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Rhopalias is a
genus of
trematodes belonging to the
monotypic family Rhopaliidae. The
species of this
genus are
found in America. Species:
Rhopalias coronatus...
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Rhopalia (singular: rhopalium) from
Ancient Gr**** ῥόπαλον (rhópalon) 'club' are
small sensory structures of
certain Scyphozoan (true jellyfish) and Cubozoan...
- box
jellyfish have six eyes on each of
their four
rhopalia,
creating a
total of 24 eyes. The
rhopalia also
feature a
heavy crystal-like
structure called...
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niches between the
lappets are
dangling rudimentary sense organs known as
rhopalia, and the
margin of the bell
often bears tentacles. On the
underside of...
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Rhopalia is a
genus of
flies in the
family Mydidae.
Rhopalia annulata Sack, 1934
Rhopalia bequaerti Lyneborg, 1970
Rhopalia berlandi Séguy, 1949 Rhopalia...
- by a
decentralized nerve net and
simple receptors.
Cnidarians also have
rhopalia,
which are
involved in
gravity sensing and
sometimes chemoreception. Several...
- bell margin.
Medusae also have
eight tentacles,
alternating with
eight rhopalia, and
twice as many
lappets occur as tentacles.
Atolla bairdii Fewkes, 1886...
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cystophora (8 mm diameter) Does not
include 1000
neurons in each of the four
rhopalia Medicinal leech 10,000 Pond
snail 11,000 Sea slug 18,000
Amphioxus 20,000...
- the
nerve cells are
instead concentrated into
small structures called rhopalia.
There are
between four and
sixteen of
these small lobes arranged around...
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measures only
about three quarters of the bell height. Each of the four
rhopalia has six eyes, two with lenses, and two each of slot and pit
pigment eyes...
