- The
operculum is a
series of
bones found in bony fish and
chimaeras that
serves as a
facial support structure and a
protective covering for the gills;...
- Mississippi. p. 436. ISBN 978-1-57806-246-1. Pomoxis:
sharp opercle, in
reference to the
opercle bone
ending in two
spines Wallus, Robert; Simon,
Thomas P...
-
spots or stripes.
There is a
black coloration of the
membrane between the
opercle and the
other head bones. A
series of
faint horizontal stripes is evident...
- is the
reduced first gill arch of a fish (on the
inner surface of the
opercle, near the
junction of the preopercle) as well as a
reduced "false" gill...
- it the bluntnose.
There is a dark
lateral line
which stretches from the
opercle to the base of the tail,
where a
large black spot is located. The average...
- is
deeply notched between the 10
spines and the 9 to 13 soft rays. The
opercle has two spines, and the anal fin three.
Their bodies are
compressed and...
- has
golden iridescence.
Iridescence is
particularly pronounced on the
opercles (gill covers)
which have a
violet sheen on
their posterior side. The iris...
-
maxillary barbels, and
nasal barbels. No
adipose fin is present. The
opercle lacks spines. The
Nematogenyidae and
Trichomycteridae are
sister groups...
- are venomous; they have two
large venomous spines situated behind their opercles and
above their pectoral fins. The
species within the
genera Astroscopus...
- Asia,
Southeast Asia and China.
These species have a
sharp spine on the
opercle, soft and
spinous parts of the
dorsal fin contiguous,
three spines in the...
