Glossary

Terms

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There are 17 names in this directory beginning with the letter S.
saltatorial
Legs adapted for jumping

scale
A flattened seta (hair); often pigmented. Characteristically found covering the body and wings of Lepidoptera.

scape
The basal segment of an insect antenna that articulates with the head capsule

scarabaeiform
Larval body type often called white grubs. Robust and "C"-shaped body with no abdominal prolegs and short thoracic legs. Example: June beetle and dung beetle

sclerites
Rigid "plates" of exoskeleton surrounded by membrane or sutures are known as sclerites.

sclerotization
Hardening of the cuticle; sclerites harden and darken as quinone cross-linkages form within the exocuticle. This process (also called tanning) gives the exoskeleton its final texture and appearance.

serosa
Cells in the blastoderm become part of a membrane (the serosa) that forms the yolk sac. Cells from the serosa grow around the germ band, enclosing the embryo in an amniotic membrane.

setae
Larger hairs, bristles, and scales (called setae or macrotrichae) that project from the integument. (sing. seta)

spiracles
Spiracles are valve-like openings in the exoskeleton that regulate the flow of air into and out of the tracheal system. Spiracles are located laterally along the thorax and abdomen of most insects -- usually one pair per body segment.

spurs
Multicellular projections of the exoskeleton are called spines (or spurs, if movable). They are lined with epidermis and contain both procuticle and epicuticle.

sternite
Simple sclerite that covers the ventral surface of each abdominal surface; a subdivision of a sternum.

sternum
Ventral thoracic sclerites are called sterna (or sternites).

stigma
Rectangular stigma (pigmented patch) near tip of each wing of dragonflies and damselflies

stylet
One of the elongate parts of piercing-sucking mouthparts; a needle-like structure.

subgenital plate
The subgenital plate closes over and protects the male genitalia. The male's aedeagus is usually hidden away under the subgenital plate.

subimago
Winged "subadult" that undergoes one molt and becomes the adult; unique to mayflies (Ephemeroptera)

suture
An external shallow groove at the junction between two sclerites.