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  • noun

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comb-like respiratory structure serving as the gill of certain mollusks

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Groups of ctenidia cover the internal surface of the sheaths throughout its length (Figs.
Tip of male fixed cheliceral finger rounded, tapering anteriorally, palpal tarsus dark for at least the distal half, metatarsus dark 80% apically, dusky creamy orange chelicera, dark to dusky light orange propeltidium; ctenidia short (about half the succeeding segment), pointed.
Furthermore, feeding studies with the blue mussel (Mytilus edulis Linnaeus, 1758) indicate that high algal concentrations can severely overload the ctenidia and reduce filtration rates (Riisgard et al.
The posterior tail region includes the single fused gonopericardial duct, the intestine, and the most posteriorly situated knob with the hemocoel, gametoduct, rectum, and a pair of bipectinate ctenidia in the bell-like mantle cavity.
Posterior border of second post-spiracular sternite with a row of about 50 ctenidia.
Abdomen with lateral ctenidia in segments V-VIII, transverse comb complete on segment VIII, teeth separated.
Endosymbionts observed on histological examination included Rickettsia-like organisms (RLOs) in the ctenidia (n = 246); an unidentified metazoan parasite in the siphon epithelium (n = 220); and microsporidia-like species in the intestine (n = 103), siphon muscle (n = 28), and ova (a Steinhausia-Wke parasite; n = 99).
Endoscopic visualization of the functional morphology of the ctenidia of the unionid mussel Pyganodon cataracta.
The number, shape and relative length of ctenidia to succeeding tergite was noted.
cancellata is not able to tolerate silt and clay because of ctenidia obstruction, and reported two exceptions to this: the bivalves of the families Lucinidae and Tellinidae, represented in localities B and C by Codakia orbicularis.
Giant clam ctenidia or gills were examined for histological abnormalities.
In Nucula, the protobranch gill closely resembles the ctenidia of prosobranch gastropods, because both consist of a series of leaflets along a gill axis (Yonge, 1947).
Such resolution may also help account for adaptive adjustments in efficiencies of retention on the ctenidia (Stenton-Dozey & Brown 1992, Barille et al.
fluminea are held in the inner demibranches of the ctenidia (gills) after release from the gonads, then fertilized, and embryos are brooded in the same structure.