metasternum


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metasternum

 [met″ah-ster´num]
the xiphoid process.

xi·phoid pro·cess

[TA]
the cartilage at the lower end of the sternum.

metasternum

(mĕt″ă-stĕr′nŭm)
The xiphoid process of the sternum.

metasternum

the xiphoid process.
References in periodicals archive ?
Color dorsally very dark brown to black with feeble metallic luster, particularly on pronotum; metasternum anteriorly only feebly tumid medially; well-developed males with anterior clypeal margin obtusely angulate medially; size under 8 mm .
Diagnostic characters: male metasternum broadly concave and depressed on posterior half; male metasternal process absent (Fig.
Diagnostic characters: male metasternum with posterior portion strongly excavate, forming a deep cavity immediately anterior to the genital complex; male metasternal process recessed and greatly reduced, if present then broad and bi-laterally bidentate, with small papillae (Figs.
8); posterior margin of metasternum straight or at most only weakly emarginate, bearing a number of minute black spinules but lacking a medial lobe or prominence (Fig.
Fore femur and tibia of male lacking dark teeth or tubercles; posterior margin of male metasternum bearing a large, distally flaring posteromedial process resting against the genital capsule, posterior margin of this process emarginate, curving downward, and bearing numerous short, vertical striae (Fig.
Fore femur and tibia of male with at least a few dark teeth on ventral surfaces; posterior margin of male metasternum not modified as above, posteromedial process on posterior margin of metasternum, if present, not resting against genital capsule 3
10B); fore tibia without teeth or tubercles; posterior margin of male metasternum with two prominent, squared-off medial processes separated by a wide gap centrally (Fig.
Ventral margin of male fore femur bearing basal and apical teeth that are larger than the remaining dark ventral teeth; fore tibia with a few dark teeth or tubercles, at least basally; posterior margin of male metasternum either straight or with a single medial process, this process sometimes bidentate in the form of two lateral angles separated by a broad, shallow medial concavity, but never in the form of two prominent quadrate processes as noted above 4
12A, B); posterior portion of male metasternum folded upward and inward across its entire width to form a deep, hair-free cavity anterior to the genital capsule, posterior margin of metasternum either unmodified or bearing a broad, bidentate, centrally concave medial process, this process deeply recessed in pregenital cavity and therefore often difficult to see (Figs.
5A-D); male metasternum not folded so strongly downward and inward as above, if a pregenital depression present then this cavity occurring only on central section of metasternum and lined with silvery setae; posterior margin of male metasternum either lacking a medial process (Fig.
12B), inner face of tibia distal to this depression bearing two angular teeth, one immediately distal to depression, the other near midpoint of tibia; middle fore femur with only ventral margin of male fore femur with 3-5 widely separated small, sharp black teeth in area between prominent basal and distal spurs; concave and depressed posterior section of metasternum bearing a low but distinct longitudinal carina medially; French Polynesia (Fig.
Median groove on thoracic sterna not interrupted by a transverse sinuous carina between mesosternum and metasternum Leptopharsa Stal