Glossary - Pests of Ornamental Trees, Shrubs and Flowers - page 441

stigma ( pl . stigmata ) A breathing pore in a mite. See
also pterostigma and reniform stigma .
stipe On an egg, a dorsal spine-like projection.
stolon A lateral stem that grows out horizontally at
ground level, rooting and budding at the nodes to
produce new plants.
stoma ( pl . stomata ) A small pore, as in the epidermis of
a leaf, that allows gases to pass between the inside of
a plant and the outside air.
stool The stump of a plant from which new shoots arise.
stria ( pl . striae ) A groove running across or along the
body cuticle, as on the elytra of beetles. Also, as in
the pattern on a moth wing, a streak, line or dash.
strobe A furrow-like depression on the side of the
rostrum of a weevil.
subanal Close to the anus.
subcostal Close to the costa.
subdorsal Close to the middle of the back.
subhyaline Almost transparent.
subjugal furrow The division on the idiosoma of a mite,
between the propodosoma and the hysterosoma.
submarginal Close to the margin.
subspecies Taxonomically, a subdivision of a species.
subspiracular Close to but below the level of the
spiracles.
subterminal Close to the apex.
suctorial Sucking.
suture A division on the body surface, dividing one
sclerite from another.
syn. Synonym.
synonym An alternative name for an organism.
tarsal Pertaining to the tarsus.
tarsus ( pl . tarsi ) The distal part ('foot') of the leg of an
insect; strictly, subdivisions of the tarsus are not
segments and are usually termed 'tarsomeres'. Also,
the last segment of the leg of a mite.
tegmen ( pl. tegmina ) The hardened, leathery fore wing
of certain insects, such as a cockroach.
tegula ( pl . tegulae ) A small lobe covering the base of
the fore wing.
telson The hindmost segment-like division of the body
of a crustacean.
tergite A dorsal sclerite on the abdomen of an insect.
Also, in an eriophyid mite, a dorsal annulation on the
hysterosoma.
tergum The dorsal section of a body segment.
terminal bud A bud arising at the apex or tip of a plant
stem.
terminal process On an aphid antenna, a narrow
extension at the tip of the apical 'segment'.
test In a scale insect, the protective covering formed
from wax and cast nymphal skins.

thorax The second of the three main divisions of the
body of an insect, from which arise the legs and wings.
thoracic Pertaining to the thorax.
thumb-claw An enlarged spine-like seta arising from
the tibia of an eriophyid mite.
tibia ( pl . tibiae ) The fourth segment of the leg of an
insect. Also, the fifth segment of the leg of a mite.
trachea ( pl . tracheae ) One of the breathing tubes that
permeate the body of an insect, opening to the
outside via the spiracles.
tritonymph The third-stage nymph of a mite.
trochanter The small and often inconspicuous second
segment of the leg of an insect. Also, the second
segment of the leg of a mite.
tuber A swollen underground root or stem, containing
food reserves.
tubercle A small rounded projection.
umbelliferous Pertaining to the plant family Apiaceae
(formerly Umbelliferae).
unicolorous Of one colour throughout.
unilocular Single-chambered.
uniordinal Of one size.
uropod One of a pair of appendages arising from the
last abdominal segment of a crustacean.
urticating Stinging or irritating.
var. Variety
variety As in a plant, a taxonomic rank below that of
species.
vascular Pertaining to the vessels that transport water
and nutrients within a plant.
vascularized Supplied with vessels that circulate fluids.
vector An organism that carries and transfers a virus or
other organism from one plant or animal to another.
venation The arrangement of veins in the wing of an
insect.
ventral Pertaining to the underside of an animal
(cf. dorsal).
verruca ( pl . verrucae ) A wart-like outgrowth, often
bearing one or more bristles or setae.
viviparous Giving birth to live young, rather than
laying eggs.
viceral mass In a mollusc, the region of the body that
contains most of the digestive, excretory and nervous
systems.