metathorax

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metathorax

[¦med·ə′thȯr‚aks]
(invertebrate zoology)
Posterior segment of the thorax in insects.
References in periodicals archive ?
Coloracion amarillo tenue, excepto el escutum, escutelo, axila, tegula, panel lateral del metanotum y frenum, los cuales son de color cafe tenue.
Pronotum elongate, moderately compressed anteriorly, extending onto lateral surfaces, ending in proximity to single well developed rectangular prosternal plate, covering almost the entire venter; meso- and metanotum less than half the length of the pronotum, thoracic nota with minute hair-like sensilla; spiracles in plural regions proximal to anterolateral margins of the mesonotum.
Gibson (1972) subdivided the genus into five subgenera according to the kind of vein 3RSb (tubular or spectral), shape of lower face (rounded or flat) and ocellar triangle (raised or not raised into pyramidal projection), and level of scutellum in reference to metanotum (at same level or medially at higher level).
Receptive females mount males and feed on secretions from a gland on the males' metanotum for a short period (5 sec to 5 min) before copulation and an extended period (30 sec to 30 min) after copulation (Bell 1979; Brown 1994).
33) Thorax hemispherical, metanotum surpassed by scutellum (1); metanotum not surpassed by scutellum (0).
Plate V: Features around the ocellar triangle and the metanotum 10a.
Metanotum dull, granulated and rugose; propodeum reticulate rugose (Figures 5 and 6), with two median subparallel keels on dorsal surface; posterior surface with two longitudinal keels.
In females, the dorsal parts of metanotum, the first abdominal terga (as seen between the bases of the tegmina) and the black medial band on epiproct (Fig.
Metanotum very small compared to pronotum and mesonotum.
Measurements (mm): Bodylength 79, head 5, antennae 65, pronoturn 5, mesonotum 10, metanotum 5, median segment 7, profemora 21, mesofemora 14, metafemora 23, protibiae 22.