ctenidium


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Related to ctenidium: ctenidia

ctenidium

(tĭ-nĭd′ē-əm)
n. pl. ctenid·ia (-ē-ə) Zoology
A comblike structure, such as the respiratory apparatus of a mollusk or a row of spines in some insects.

ctenidium

(pl. ctenidia) one of the comblike gills present in the mantle of many molluscs, particularly Lamellibranchia.

ctenidium

a spine which occurs in rows on the heads of fleas; called also combs; useful for morphological identification.
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Fore coxa with 9 brown setulae on anterior surface; mid coxa with 8 brown setulae; fore tibia with ctenidium of 12 spinules.
Fore coxa with 18 brown setulae on anterior surface; mid coxa with 16 brown setulae; fore tibia with ctenidium of 10 spinules.
Fore coxa with 8 diminutive brown setulae on anterior surface; mid coxa with 2 very strong, lateral, ventrally-directed black setae, 1 very strong medial seta and 5 brown setulae; fore tibia with 4 strong setae on lateral margin, the second basal seta of similar length to other three, with ctenidium of 9 or 10 short, sharp, black spinules, separated from each other by one or more basal spinule widths.
Fore coxa with 9 brown setulae; mid and hind coxa silver-yellow pruinose, mid coxa with 3 brown setulae; hind coxa with 2 brown setula; fore tibia usually with 4 strong setae on lateral margin, the second basal seta of similar length to other three, with ctenidium of 7-9 short, sharp black spinules.