Quadricolumella see columella

quadridentate a. [L. quadrus, fourfold; dentatus, tooth] Having 4 teeth or tooth-like processes.

quadrifid a. [L. quadrus, fourfold] Four rows; in 4 segment.

quadrilateral a. [L. quadrus, fourfold; latus, side] 1. Formed or bounded by 4 sides; 4 lines. 2. (ARTHRO: Insecta) In zy-gopterous Odonata, the discal wing cell.

quadrimaculate a. [L. quadrus, fourfold; macula, spot] Having 4 spots.

quadripartite a. [L. quadrus, fourfold; partitus, divided] In 4 parts.

quadripinnate a. [L. quadrus, fourfold; penna, feather] Having 4 feather-like branches or clefts.

quadriprostatic a. [L. quadrus, fourfold; Gr. prostates, one who stands first] (ANN) Having 4 prostates.

quadriradiate a. [L. quadrus, fourfold; radius, ray] (PORIF)

Having 4 rays; tetraxon, tetractine.

quadrithecal a. [L. quadrus, fourfold; Gr. theke, case] (ANN) Having 4 spermathecae.

quadrivalve a. [L. quadrus, fourfold; valva, fold] 4-valved.

quartet see tetrad quasisocial a. [L. quasi, as if; socius, companion] (ARTHRO: Insecta) In Hymenoptera, females of the same generation forming a colony and cooperating in brood care.

queen n. [A.S. cwen, wife] (ARTHRO: Insecta) 1. A female member of the reproductive caste in semisocial and euso-cial insects; may or may not differ morphologically from the workers. 2. In Formicidae, a fully developed reproductive female characterized by a generalized hymenopterous thorax and functional but deciduous wings; sometimes referred to as 'the female' of the colony.

queen control (ARTHRO: Insecta) In social Hymenoptera, inhibitory influence of the queen on the reproductive activities of workers and other queens.

queen substance (ARTHRO: Insecta) In Hymenoptera, phero-mones released by the queen honeybee that attracts and controls the reproductive activities of workers and other queens; Trans-9-Keto-2-decanoic acid is the most potent component of the pheromone mixture.

Quenstedt muscles (MOLL: Bivalvia) Paired, small muscles anterior to the ctenidial elevator muscles of oysters.

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