Opercle


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Related to Opercle: gill cover

O´per`cle


n.1.(Anat.) Any one of the bony plates which support the gill covers of fishes; an opercular bone.
2.(Zool.) An operculum.
References in periodicals archive ?
The percentage of representation was characterised by good preservation of the pharyngeal bone (PR = 55.55 %) and the first vertebra (PR = 52.78 %) in cyprinids, the articular and the precaudal vertebrae in anguillids (PR = 16.67 % and 15.93 %) and the opercle in clupeids (PR = 50 %).
Taphonomic signature of Eurasian eagle owl (Bubo bubo) on fish remains
The opercle is also highly modified as an odontode-bearing structure.
Morfologia externa del pez parasito Paravandelliaphaneronema (Miles 1943) (Siluriformes: Trichomycteridae) observada mediante imagenes de microscopia electronico de barrido
Evolution of opercle bone shape along a macrohabitat gradient: species identification using mtDNA and geometric morphometric analyses in neotropical sea catfishes (Ariidae).
Geometric Morphometric Analysis of the Morphological Variation among Three Lenoks of Genus Brachymystax in China
Body covered in rough ctenoid scales; head entirely scaled, scales above dorsal opercular opening origin unorganized and very small, scales organized into loose rows on preopercle and opercle, scales on snout, premaxilla, maxilla and lower jaw minute and unorganized.
A new species of Sebastes (Scorpaeniformes: Sebastidae) from the northeastern Pacific, with a redescription of the blue rockfish, S. mystinus (Jordan and Gilbert, 1881)
Sides of head yellowish brown, opercle golden yellow, scale borders brownish; black suborbital bar.
A new papiliokbias species teleostei: cyprinodontiformes: rivulidae from bolivian amazon
melanophores of caudal peduncle spot not conspicuous and restricted to just caudal peduncle) and by having the humeral spot extending on to the posterior part of the opercle (vs.
Tres nuevas especies de Hemibrycon (Characiformes: Characidae) de la cuenca del rio Magdalena, Colombia
After preservation, it was overall pale, with dusky areas on head, nape, opercle, and on the dorsum at the base of the dorsal fin.
First record of an Aurora Rockfish, Sebastes aurora, from Alaskan waters
At the nest, the pair of red-eyed bronzebacks swim in a circle, with him frequently nipping at her opercle, the bony covering protecting her gills.
What the River Carries
The following sets of dimensions were taken: 1) Standard length: from tip of snout to base of caudal fin; 2) Head length: from tip of snout to posterior margin of opercle; 3) Snout length: from tip of snout to anterior margin of orbit; 4) Predorsal distance: from tip of snout to anterior base of first dorsal ray; 5) Preanal distance: from tip of snout to base of anal fin insertion; 6) Length of base of adipose fin; 7) Caudal peduncle depth: shorter distance from caudal peduncle; 8) Head depth: taken at occipital region; 9) Body depth: at dorsal fin origin; 10) Orbital diameter: taken horizontally; 11) Interorbital width: taken between eyes; 12) Mouth width: width of lower jaw.
Five new species of genus Astyanax Baird & Girard, 1854 from Rio Iguacu, Parana, Brazil (Ostariophysi, Characiformes, Characidae)/ Cinco novas especies do genero Astyanax Baird & Girard, 1854 do Rio Iguacu, Parana, Brasil (Ostariophysi, Characiformes, Characidae)
We initially identified Ammocrypta clara specimens from Elk River samples based on the presence of a well developed needle-like opercle spine, one of several characters that differentiates A.
Discovery of Ammocrypta clara (western sand darter) in the upper Ohio River of West Virginia
133: 0 [right arrow] 1, absence of adductor mandibulae Aw), with the genus Phractolaemus (249: 0 [right arrow] 1, mandible highly modified, the dentary bone being roughly perpendicular to the main body of the mandible), and with the genus Chanos (216: 0 [right arrow] 1, presence of prominent, thin, dorsally/anterodorsally oriented anterodorsal projection of opercle).
Teleostean phylogeny based on osteological and myological characters/Filogenia de teleosteos basada en caracteristicas osteologicas y miologicas
Head reddish above, dark brown behind eyes and to posterior edge of opercle, pale with dark spots below eyes, to pelvic-fin base; dark-brown, oblique bar from lower margin of eye with pale blue anterior to and below eye, and bright yellow spot immediately behind eye.
Fishes of the Helcogramma steinitzi species group (Blennioidei: Tripterygiidae) from the Indian Ocean, with descriptions of two new species
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