Supratympanal organ see subgenual organ

suranal a. [L. supra, above; anus] Above the anus; supraanal.

suranal plate (ARTHRO: Insecta) A heavily sclerotized area on the dorsum of the last abdominal segment; a plate or lobe dorsad of the anus; epiproct; anal plate. see ectoproct.

surface ornamentation (MOLL: Bivalvia) A regular relief pattern on the surface of many shells.

surface pheromone A pheromone active only on or very close to the body; contact or near contact must be made.

surface tension Surface film on liquids caused by cohesion of the molecules of the liquid at the free surface.

surpedal area or lobe (ARTHRO: Insecta) In Hymenoptera, a lobe or area just above the prolegs and below and behind the spiracle on the abdomen of Symphyta larvae; suprapedal area; postepipleurite.

surstyli; sing. -lus [L. supra, over; Gr. stylos, pillar] (ARTHRO: Insecta) In Diptera, paired appendages of the ninth abdominal tergite (epandrium); suprastyli.

suspensor n. [L. sub, under; pendere, hang] 1. (ARTHRO: Insecta) In Hymenoptera, a structure composed of carton or wax attaching the comb nests of bees and wasps. 2. (nemata: Adenophorea) Muscles associated with the spi-cules, enclosing the distal part of the spicules of Paratrichodorus and other males in Diphtherophorina.

suspensorium n.; pl. -ria [L. sub, under; pendere, to hang] 1. Anything that suspends a part. 2. (ARTHRO: Insecta) a. In Blattoidea, a pair of linear sclerites extending toward the lateral mouth angle on each side of the proximal half of the hypopharynx. b. In Coleoptera, extends from the adoral face upwards to end in the lateral walls of the stomodeum; fultura. c. Suspensory ligaments that insert into the body wall or dorsal diaphragm suspending developing ovaries in the hemocoel.

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