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, gen.


, pl.


(dōr'sŭm, -sī, -să), [TA]
1. The back of the body.
2. The upper or posterior surface, or the back, of any part, especially in the quadrupedal position.
Synonym(s): tergum
[L. back]
Farlex Partner Medical Dictionary © Farlex 2012


n. pl. ter·ga (-gə)
The dorsal portion of a body segment of an arthropod.

ter′gal (-gəl) adj.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.


the plate of thickened, often chitinous material on the dorsal side of an insect segment, forming part of the EXOSKELETON.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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Generally for species recognition, males are required because features of the genitalia and the right medial lobe of the 7th abdominal tergum (pseudostrigil) are diagnostic.
Dietrich and Deitz (1993) listed as synapomorphies for Cicadellidae: the mesonotum exposed posteriorly, the labium not reaching the metathoracic coxae, m-cul crossvein present, metatibia with distinct long setae, tarsomere I of hind leg without cucullate setae, stemum IX and subgenital plate not fused, and abdominal tergum with divided acanthae; all of which are homoplastic characters in their analysis.
Furthermore, Synophrus and Saphonecrus appear to share several apomorphies with Synergus, notably in the structure of the petiole and in the fusion of the third and fourth abdominal tergum in the male, and Rhoophilus seems to be the sister group of Synergus + Synophrus + Saphonecrus (Ronquist, unpubl.
In comparison, in such genera as Cryptorhopalum, Orphinus, and Thaumaglossa, brushes of the hastisetae are inserted on each side of a membrane behind the tergum (Beal 1991; Kiselyova & McHugh 2006).
Leptofoenus is characterized by presenting the eighth gastral tergum reduced, pronotal lateral surfaces with finely striate regions and the length of basitarsus of all legs twice as long as second tarsomere (Engel, 2009).
Lateral margins of pronotum completely dentate except humeral angles, dentine on posterior portion slightly less prominent, anterior angles acutely produced but not extending beyond eyes, humeral angles quite acute; length of pronotum 4.0 mm, width 10.0 mm; scutellum reaching to fifth abdominal tergum, with u-shaped apical lobe, subacute at apex; length of scutellum 8.6 mm, and width at base 5.8 mm; metathoracic scent gland ostioles (Fig.
Mostly dark brown; face, front, vertex, temples and occiput dark brown; gena brown; clypeus and mandibles dark yellow (Figure 1e); labrum, labial and maxilar palp pale; antenna with scape and pedicel yellow and flagellomeres brown; mesoscutum dark brown; wings hyaline; tergum I yellowish; remaining terga light brown; ovipositor sheaths brown; foreleg and midleg from coxae to 3rd tarsomeres yellow, 4th and 5th tarsomeres yellowish brown; hindleg yellow from coxa to approximately 2/3 of tibia, the remaining 1/3 of tibia to the 5th tarsomere yellowish brown.