metathorax

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Related to Metapleuron: metathorax

metathorax

[¦med·ə′thȯr‚aks]
(invertebrate zoology)
Posterior segment of the thorax in insects.
References in periodicals archive ?
Metapleuron smooth, with sparse white pilosity, denser along lower and hind margins.
Mesosoma mostly orange, mesoscutum with two ferruginous spots (submedial one bigger than posterior one); propleuron, mesopleuron and metapleuron light orange.
For example, pronotum and metapleuron widths showed no correlation with other traits after size-adjustment.
Metapleuron smooth, bare in most of anterior half, the rest with white pilosity which is dense in less than posterior half.
Mesosoma: pro- and mesonotum with 13 fine, parallel, continuous carinae, only slightly irregular, interspaces smooth, at least twice as wide as carinae; sides of pronotum with 6 irregular fine carinae, interspaces smooth; posterior area of mesopleuron and anterior area of metapleuron with 5 carinae, slightly rugose between carinae; propodeal spines triangular, shorter than anterior dorsal face of petiole.
warana, both with orange head, by: scapus, pedicellus, mesopleuron and metapleuron brown to blackish; prominent anterior median knob on first tergite of metasoma.
schuhi is the presence of a more reddish colored rather than velvety black patch on the metapleuron (1-1), present in the majority of Hypseloecus taxa.
Metapleuron, propodeum, petiole and postpetiole (except dorsal sides) with fine reticulation.
The characters distinguishing the new species are the following: head and mesosoma partly black or brown; antennal segments 4-5 not broader than other segments; posterior ocelli not touching occipital carina; pronotum partly black, humped, with distinct posterior collar; scutum punctate, unsculptured among punctures; metapleuron without shiny and unsculptured area; dorsal surface of propodeum more than twice as long as posterior surface; segment 1 of protarsus slightly longer than segment 4.
Ventral surface yellowish matte with darker and rougher punctures than dorsal side; evaporatorium on meso and metapleuron darkened.