paramere


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paramere

[′par·ə‚mir]
(biology)
One half of a bilaterally symmetrical animal or somite.
(invertebrate zoology)
Any of several paired structures of an insect, especially those on the ninth abdominal segment.
References in periodicals archive ?
Male paramere, in profile, lanceolate, more than 0.8 times as long as proctiger.
10b) short and roughly triangular in shape with outer corner pointed, surrounding the gonopore, with obscure sensillae at lateral sides of gonopore above paramere, posterior margin slightly serrated and expanded distal margin; parameres very short, laterally concave, anteriorly broad, posteriorly averted with rounded blunt terminal ends, may without terminal microseta.
7 and 8): hypandrium stripe-like with a small triangular posterior projection on one side, gonocoxites with a group of alveoli on lateral margin, gonostyli little longer than gonocoxite, coniform, with acute apex, a group of alveoli at base and short sparsely distributed setae on apical 2/3; gonocoxal apodeme strongly sclerotized, pilose ventrally and with rounded distal margin; aedeagus bifid, left branch little longer and wider in dorsal view, one short sinuous paramere articulates with aedeagus and ends on the small projection of the hipandrium; epandrium as long as wide, pilose, surstyli coniform, 1.5X the length of gonostyle, with one tenaculum at apex.
1 Anterior part of 4th antennal segment dark brown; apical margin of male paramere almost straight with distinct and quite thick apical spin; spermathecal bulb with four processes of variable shape and size ................................................
Aedeagus asymmetrical through 90[degrees] inversion of distiphallus; with two parameres, and these carrying a rugose morphoventral projection (Fig.
Left paramere, endosoma, and phallotheca of holotype of Leptidolon vittipenne Reuter.
The paramere of the male is forked and resembles with P.
Examination of the aedeagi of males showed strong differences in the shape and angle of the basal ring, as well as in the shape and length/width ratio of the parameres among adeagi of M.
It differs by the entirely yellow antenna, hind tibia without erect posterior bristles medially, a large pair of light brown spot on all tergites, surstylus shorter than epandrium, aedeagus thin and elongated, and paramere bristled distally.
In the beetles of this study, differences in male paramere form are associated, as predicted, with differences in female hemisternites.
Male genitalia: Pygofer with a rounded process between the anal tube and subgenital plates (Figure 5); subgenital plates long, dorsal margin forming a rounded elevation near the basal portion, apex bilobate (Figure 6); paramere slender with one apical, hook-like spine directed forward, dorsal margin slightly elevated (Figure 7); aedeagus slender, hammer-shaped, curved in lateral view; in dorsal view apex with two pairs of processes x-shaped, shaft with two rows of small spines located near the apex (Figures 8-9).
On a world basis, the carinate elytral intervals, medially depressed supra-antennal sutures, ascendant prosternal process, reduced metacoxal plates, small apically positioned paramere expansions make C.