capitellum

(redirected from capitella)
Also found in: Dictionary, Encyclopedia.

ca·pit·u·lum

, pl.

ca·pit·u·la

(kă-pit'yū-lŭm, -lă),
1. A small head or rounded articular extremity of a bone.
See also: caput. Synonym(s): capitellum (1)
2. The bloodsucking, probing, sensing, and holdfast mouthparts of a tick, including the basal supporting structure; relative size and shape of mouthparts forming the capitulum are characteristic for the genera of hard ticks.
[L. dim. of caput, head]

capitellum

/cap·i·tel·lum/ (kap″ĭ-tel´um) capitulum.

capitellum

(kăp′ĭ-tĕl′əm)
n. pl. capi·tella (-tĕl′ə) Anatomy
The rounded protuberance at the lower end of the humerus that articulates with the radius.

capitellum

(1) Head; capitulum. 
(2) Capitulum of humerus; capitulum humeri [NA6].

ca·pit·u·lum

, pl. capitula (kă-pit'yū-lŭm, -lă)
1. [TA] A small head or rounded articular extremity of a bone.
Synonym(s): capitellum (1) .
2. The bloodsucking, probing, sensing, and holdfast mouthparts of a tick, including the basal supporting structure; relative size and shape of mouthparts forming the capitulum are characteristic for the genera of hard ticks.
See also: caput
[L. dim. of caput, head]

ca·pit·u·lum of hu·mer·us

(kă-pit'yū-lŭm hyū'mĕr-ŭs) [TA]
The small rounded eminence on the lateral half of the distal end of the humerus for articulation with the radius.
Synonym(s): capitellum (2) .

capitellum

a rounded bone articulation. See CAPITULUM (1).
References in periodicals archive ?
Professor Biggers made the original discovery of alkylphenols in lobsters and their effect on Capitella metamorphosis.
The ten top dominant species were Prionospio heterobranchia (832 specimens), Polydora websteri (548), Scoloplos acmeceps (370), Exogone lourei (291), Mediomastus californiensis (273), Cirriformia spirabrancha (128), Capitella capitata (68), Chone mollis (62), Megalomma pigmentum (59) and Fabricinuda limnicola (50).
Other species collected include Capitella capitata.
Capitella worms have long been tagged as pollution indicators; they hang out near pulp mills, for example, and any place abundant in decaying organic matter, upon which they feed.
2012)--2-t-butyl-4-(dimethylbenzyl) phenol, 2,6-bis-(t-butyl)-4-(dimethylbenzyl) phenol (also known as MON-0585, a Monsanto mosquito larvicide similar to Methoprene (Sachet 1971)), 2,4-bis-(dimethylbenzyl) phenol (compound 3), and 2,4-bis (dimethylbenzyl)-6-t-butylphenol, 4-cumylphenol, and BPA--had juvenile hormone activity in the Capitella bioassay.
Six species described as opportunistic were located in the south zone, including Capitella capitata, Cossura sp, Dorvillea annulata, Armandia brevis, Polydora cirrosa, and Notomastus tenuis.
The dominant polychaete in the 1998 collection was Streblospia benedicti (74% of the total), followed by Capitella capitata (17%), Haploscoloplos sp.
prolifera, Hull (1987) showed the bivalve, Macoma balthica, and the polychaetes Nereis diversicolor and Capitella capitata were more abundant in sediments in algae-covered plots, whereas the polychaete Pygospic elegans was less abundant and the abundances of some species were not affected.