Metanotum


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Met`a`no´tum


n.1.(Zool.) The dorsal portion of the metaphorax of insects.
References in periodicals archive ?
The genus Acerentuloides is characterized by 2 pairs of A-setae on the mesonotum and metanotum; 3 setae on the 2nd and 3rd pair of abdominal legs, of which the apical median seta is minute; well developed labial palpus with terminal tuft of setae and broadened sensillum; maxillary gland with small, smooth, globular vesicle or granulated appendix on the calyx and with several small globules in distal part; some setae modified as short, thickened sensilla (sd5 on head; [beta]1 and [delta]4 on foretarsus; setae P4 on metanotum, M2 on prosternum, and A2 on thoracic sterna; and accessory setae on tergites and sternites I--VI); 6 setae on sternite VIII; anterior position of seta P3 on abdominal tergites II--VI; developed striate band with clearly visible parallel-sided striae.
1B): Ovoid body with the maximum width at the second abdominal segment level; light browned head, jugum and tylus; four dark browned spines at the margin of the jugum; reddish small eyes; dark browned thorax; pronotum with disperse punctuations at its surface; mesonotum with a transversal punctuation row at the middle part; metanotum with a transversal dark browned row of punctuations at its base; pale yellowed antennal and rostral segments; convex mesonotum at the posterior margin in the middle part indicating the scutellum formation; yellowish to white legs; pale pinked abdomen.
Preston-Mafham 2000): when the first spermatophore is ready to transfer, the male turns his back while raising his forewings perpendicularly to the body, which exposes the glandular structures located on the metanotum below the base of the forewings.
These organs begin to appear after one or two molts, as expansions of lateral -posterior edge of meso and metanotum.
Coloration: pro, meso, metanotum and the first two abdominal terga with tawny yellow posterior edge; abdominal segments I and II with a lateral spot on both sides; cerci yellow.
Tegmina and wings represented by well-veined lateral pads: mesonotum and metanotum with a distinct medial carination.
Metanotum and propodeum medially with a raised foamy whitish structure which in dorsal view is 1.
Scutellum and metanotum with sparse shallow small punctures, dorsal convex areas of propodeum even less distinctly punctate, strongly shiny, lateral areas of propodeum finely and superficially striate with some scattered punctures.
Thorax: Pronotum uniformly shaded with black, except two small yellowish marks on anterior region; mesonotum yellowish, shaded with black; mesoscutellum brownish with black marks, lateral regions yellowish, plumidium absent; metanotum yellowish shaded with black; pleural and stemal sclerites whitish.
Coloracion cafe oscuro, excepto la cabeza, antena, escutelo, axila, el metanotum y propodeo, estas estructuras presentan coloracion cafe tenue.
13 mm; mesosoma largely with small contiguous punctures, such punctures becoming ill-defined around median line of mesoscutum and integument granulose and imbricate; mesoscutellum as on mesoscutum, weakly bituberculate; metanotum rugulose; pleura with dense small punctures, integument otherwise strongly imbricate, punctures becoming weaker ventrally.