Definitions For Glossary Terms

ABDOMEN
The last or posteriormost of the three main body regions of an insect. In chalcids, like other apocritan Hymenoptera, the first 'true' abdominal segment (see propodeum) is rigidly attached to the thorax and there is a more or less flexible articulation between this fused segment and the 'apparent abdomen', which in chalcids is usually termed the metasoma or gaster. [drawing]
ACETABULAR CARINA
Term sometimes used for the transverse, ventral portion of the epicnemial carina on the mesothoracic venter under or behind the procoxae. [photo]
ACETABULUM
The cavity into which an appendage is articulated.
ACICULAR / ACICULATE
Needle-like.
ACROPLEURAL SULCUS
The curved line or groove on the mesopleuron that distinguishes the posterior and ventral limits of the acropleuron or subalar area. [drawing]
ACROPLEURON
Synonym of subalar area, used sometimes for the primitively small dorsal region of the mesopleuron found in most chalcid families and, more commonly, for the derived enlarged region characteristic of Encyrtidae, Tanaostigmatidae, most Eupelmidae and some Aphelinidae. [drawing] [photo][photo]
ACUMINATE
Tapering to a long point.
ADMARGINAL CELL
Term sometimes used for a longitudinal bare region on the forewing disc immediately behind the marginal vein bounded posteriorly by the first abscissa of the Radial Sector (RS1) setal line.
ADMARGINAL SETAE
Row of differentiated setae on the ventral surface of the forewing behind the marginal vein. [drawing]
ADNOTAULAR SETAE
One or more rows of differentiated setae on the mesoscutal midlobe adjacent to each notaulus. [drawing]
ADORAL DEPRESSION    See malar depression
ADPETIOLAR STRIP
Variously differentiated posteromedian region of the propodeum anterior to the propodeal foramen; sometimes called the adpetiolar triangle. [drawing]
ADPETIOLAR TRIANGLE    See adpetiolar strip
ADPRESSED
Lying against or along a structure (compare with decumbent and erect).
ADSTIGMAL SETAE
A row of long setae aligned in front of the stigmal vein in some chalcids.
ADVANCED AXILLA
An axilla that projects distinctly anterior to the base of the scutellum because the transscutal articulation is deeply sinuate. [drawing][photo]
AEDEAGAL APODEME
Rod-like structure extending anteriorly from each basolateral margin of the aedeagus. [drawing]
AEDEAGUS
Median lobe of the male genital capsule that is surrounded by the phallobase and through which the sperm duct traverses. [drawing] [photo]
ALITRUNK    See mesosoma
ANAL FILAMENT
A membranous extension from behind the anus that covers the ovipositor sheaths dorsally in some females with an exserted ovipositor. [photo]
ANAL SCLERITE
In some female Eupelmidae, a more or less sclerotized, flap-like sclerite that covers the anus. [photo]
ANAL VEIN (A) SETAL LINE
In Trichogrammatidae, used for a longitudinal setal line near the posterior margin of the wing behind the second branch of cubital vein (CU2) setal line; analogous or homologous with the subcubital setal line of other chalcids. [drawing]
ANAPLEURAL SUTURE
Term that has been very rarely used in Agaonidae for the acropleural sulcus and which is not homologous with the true anapleural suture.
ANAPLEURITE
Term that has been very rarely used in the Agaonidae for the subalar area/acropleuron.
ANELLIFORM
In the shape of a disk, transverse or ring-like.
ANELLUS
(pl., anelli) One or more, usually transverse or ring-like, basal flagellar segments that lack longitudinal sensilla. [drawing]
ANTECLYPEUS
Term sometimes used for a slender depressed or rim-like, smooth apical margin of the clypeus. [drawing]
ANTENNA
Paired segmental sensory appendage on the head, composed of the scape, pedicel and flagellum. [drawing]
ANTENNAL CLEANING ORGAN
Term used for the composite structure of the calcar of the foretibia and the strigil of the foretarsus, through which the antennae are stroked to clean them.
ANTENNAL FORMULA
The number of units comprising the three segments of the antenna and the three regions of the flagellum, that is, the scape and pedicel as well as the anelli, funicle, and clava of the flagellum; for example, an antenna with a flagellum having 3 anelli, 5 funicular segments, and 3 claval segments would have an antennal formula of 11353.
ANTERIOR
(adv., anteriorly) Toward or at the head (front) end of the body or structure. [drawing]
ANTERIOR ALAR PLATE    See preaxilla
ANTERIOR NOTAL WING PROCESS
A bilobed projection of the preaxilla with which the first axillary sclerite of the forewing articulates. [photo] [photo]
ANTERIOR OCELLUS
Middle, unpaired ocellus that normally is anterior to the paired posterior ocelli when three ocelli are present; sometimes called the median ocellus. [drawing]
ANTERIOR SCUTELLUM
In Mymaridae, an anterior portion of the scutellum that is differentiated by a transverse line. [photo]
ANTERIOR TENTORIAL PITS
Paired pits sometimes visible on the lower face that are external indications of the anterior tentorial arms and that partially delimit the lateral limit of the clypeus. [drawing][photo]
ANTERO-
Prefix meaning toward the head or front end of a structure, e.g. anterolateral. [drawing]
APICAL / APEX
(adv., apically) The point farthest away from the body, at to toward the end of an appendage; synonymous with distal. [drawing][drawing]
APICO-
Prefix meaning toward the apex or far end of an appendage, or region or margin of a sclerite farthest away from the transverse midline of the body, e.g. apicolateral.
ARCUATE
Arched.
AROLIUM
The median pad-like lobe that lies between the tarsal claws of a pretarsus.
AULAX
(pl., aulaces) A longitudinal groove along the dorsal length of each first valvula, into which is fitted the rhachis of the second valvulae to form the tongue-and-groove olistheter interlocking mechanism of the ovipositor stylets. [drawing]
AXILLA
(pl., axillae) Usually paired, often triangular regions posterior to the mesoscutum that usually appear as anterolateral regions of the scutellum; the term is usually used for the entire structure but each axilla has both a dorsal surface and a lateral panel of the axilla. [drawing] [photo][photo]
AXILLAR CARINA
Lateral, carinate margin of the axilla which differentiates the dorsal surface of the axilla from the lateral panel of the axilla. [photo][photo]
AXILLARY SCLERITES
Sclerites at the base of both the fore and hind wings, by which the wings are attached and articulate with the thorax (see also first, second, and third axillary sclerite). [photo]
AXILLULA
(pl., axillulae) Lateral, usually more or less vertical subdivision of the scutellum differentiated from the rest of the scutellum by the axillular groove/carina or sublateral groove and from the axilla by the scutoscutellar suture. [drawing][photo][photo]
AXILLULAR GROOVE/CARINA
In most chalcids except Eulophidae, term used for a longitudinal groove (very rarely a carina) very close to the side of the scutellum that differentiate a lateral, usually more or less vertical scutellar region, the axillula, between the groove/carina and the usually posteriorly sloping axilla (see also sublateral grooves). [drawing][photo]