Glossary - Pests of Ornamental Trees, Shrubs and Flowers - page 436

Glossary

abdomen The hindmost of the three main divisions of
the body of an insect.
abdominal Pertaining to the abdomen.
adventitious bud A plant bud that does not arise from a
leaf axil.
adventitious root A plant root that does not arise from
the primary root system.
aestivation Summer diapause.
alate A winged form, as applied to an aphid.
anal Pertaining to the anus or to the hindmost body
segment.
anal claspers The pair of prolegs on the last abdominal
segment of certain lepidopterous larvae.
anal comb A pronged, comb-like structure at the tip of
the abdomen of certain lepidopterous larvae, used to
expel frass from the anus.
anal plate A dorsal, sclerotized plate on the hindmost
segment of a lepidopterous larva.
anchor process see Sternal spatula
antenna ( pl . antennae ) One of a pair of sensory
'feelers' on the head of an insect and certain other
arthropods.
antennal Pertaining to an antenna.
apical At or towards the tip (apex) of a structure
(cf. basal).
apodous Without legs.
appendix As in the venation of the leafhopper genus
Alebra , a separately demarcated marginal area
around the wing tip.
aptera ( pl . apterae ) A wingless form, as applied to an
aphid.
apterous Wingless.
arista A bristle-like outgrowth on the antenna of certain
flies.
axil In a plant, the angle formed by the upper surface of
a leaf and the stem.
axillary In the axil of a plant.
basal At or towards the base of a structure (cf. apical).
base plate The reduced (disc-like) stem at the base of a
plant bulb.
basitarsus ( pl . basitarsi ) On the leg of an insect, the
basal (and often the largest) subsection of the tarsus.
bifid Two-pronged.

big bud A swollen (galled) bud, as induced by eriophyid
mites.
bilobed With two lobes.
biordinal Of two sizes.
bipectinate Feather-like, as applied to the antennae of
certain insects.
bisexual Of two sexes.
blotch A broad, non-linear leaf mine. Also, an area in a
patterned wing.
brassicaceous Pertaining to the plant family
Brassicaceae (formerly Cruciferae).
breast-bone see Sternal spatula
bulb A usually underground plant organ, consisting of a
short disc-like stem that bears fleshy scale leaves and
one or more buds.
callosity A hardened lump.
calyx The outermost non-reproductive part of a flower,
surrounding the corolla (q.v.).
cambium Plant tissue that is the source of cells for
secondary growth, producing either new cork (from
cork cambium) or new vascular tissue (from vascular
cambium).
capitate With a distinct head.
carapace A dorsal body shell.
case A protective, often tubular, habitation.
caterpillar A colloquial name for a leaf-feeding larva of
certain butterflies, moths and sawflies.
cauda A tail, including the tail-like structure at the hind
end of an aphid.
caudal Pertaining to the cauda.
cell On an insect wing, an area of the membrane partly
(an open cell) or entirely (a closed cell) surrounded
by veins.
cephalopharyngeal skeleton In larvae of certain flies,
the structure formed from the reduced, retracted head
and the mouthparts.
cercus ( pl . cerci ) One of a pair of segmented
appendages arising from the eleventh abdominal
segment of certain insects.
chelicerate Bearing chelicerae.
chelicera ( pl. chelicerae ) One of a pair of much
modified structures at the tip of the pedipalp of
a mite.