Definitions For Glossary Terms

LABIAL PALPUS
Paired finger-like appendages on the labium composed of up to three segments. [drawing][photo][drawing]
LABIOMAXILLARY COMPLEX
Term for the composite ventromedian labium and ventrolateral pair of maxillae. [drawing][photo]
LABIUM
Unpaired, ventral sclerite of the mouthparts that forms the median portion of the labiomaxillary complex. [drawing][photo][drawing]
LABRUM
Unpaired, dorsomedian sclerite of the mouthparts that is concealed under or partly to entirely exposed below the clypeus; the labrum is usually flap-like but sometimes is deeply emarginate so as to be digitate, that is, with finger-like projections. [drawing]
LACINIA
(pl., laciniae) Inner, apical lobe of the maxilla. [drawing]
LAMINA/LAMELLA
A thin plate-like or leaf-like cuticular protrusion.
LAMINATED BRIDGE
Transversely striated band of notal membrane that connects the basally unfused portions of the second valvulae or stylet sheath.
LANCEOLATE
Spear shaped, i.e. longer than wide and tapered apically (see also oval/ovate/ovo id and spatulate).
LATERAL / LATERAD
(adv., laterally) At or toward the side of the body or outer edge of a structure. [drawing] [drawing]
LATERAL LOBE OF MESOSCUTUM
See mesoscutal lateral lobe
LATERAL OCELLAR LINE
Minimum distance between the anterior and a posterior ocellus, abbreviated as LOL or LOD. [drawing]
LATERAL OCELLUS
See posterior ocellus
LATERAL PANEL OF AXILLA
Lateral, vertical surface of each axilla. [drawing][photo][photo]
LATERAL PANEL OF METANOTUM
More or less concave region of the metanotum on either side of the dorsellum; sometimes called the 'lateral wings' of the metanotum. [drawing][photo]
LATERAL PANEL OF PRONOTUM
The more or less vertical, lateral surface of the pronotum below the mesothoracic spiracle. [drawing][photo]
LATERAL TUBERCLES
See ventral process
LATERAL WING OF METANOTUM
See lateral panel of metanotum
LIGULA
The apical 'fleshy' and microsetose lobe of the labium, formed from the combined glossae and paraglossae. [drawing][drawing][photo]
LINEA CALVA
Narrow, oblique bare band on the forewing disc that is directed from the posterobasal margin of the wing toward the base of the stigmal vein (see also speculum). [drawing][drawing]
LINEAR SENSILLA
See longitudinal sensillum
LOD
See lateral ocellar line
LOL
See lateral ocellar line
LONGITUDINAL SENSILLUM
(pl., longitudinal sensilla) Ridge-like, longitudinal sensory structure on some or all of the funicular and claval segments of the flagellum; sometimes called multiporous plate sensilla, linear sensilla, placoid sensilla, sensory ridges, or rhinaria. Characteristic of a longitudinal sensillum is that the apex projects free for varied lengths above the surface and/or beyond the apex of the respective flagellar segment so that it can look like a seta if the projection is very long, but unlike a seta it is not articulated and its surface is continuous with the segment. [photo]
LOWER FACE
Region of the face below the toruli. [drawing]
LOWER MESEPIMERON
Ventral region of the mesepimeron that is sometimes differentiated from an upper mesepimeron by a transepimeral sulcus. [drawing][photo]
LOWER MESEPISTERNUM
Mostly ventral region of the mesepisternum below the transepisternal line/sulcus, if present, which comprises most of the mesothoracic venter; often termed the mesosternum. [drawing][photo]