gnathos

gnathos

[′nā‚thōs]
(invertebrate zoology)
A mid-ventral plate on the ninth tergum in lepidopterans.
References in periodicals archive ?
Uncus bifurcated at base, 1/2 times as long as tegument, each fork medium-long, slender at apex, broad at base; tegumen wide and arc-shaped, socii broad and wide, incurved at apex and strongly setose, shorter than uncus; gnathos degenerated; 1 pulvinus between tegument and valva, finger-shaped protuberance at pulvini; valva clavate, wide and thick at base; cucullus thin and long, strongly sclerotized; juxta similar triangle-shaped; saccus medium-long and thin.
Wilson is a member of the American Dental Association, the Wisconsin Dental Association and Gnathos, a pediatric and orthodontic study club.
antennatus in the shape of the saccus, gnathos and aedeagus, but can be easily distinguished by the shape of the anellus (its branches are widened towards the apex in the new species but are parallel-sided in M.
Stachyotis is similar to Rhabdocosma Meyrick, 1935 (Ypsolophidae) in the shape of the pleural lobes but differs from the latter in the male genitalia: processes on uncus in addition to socii present in Stachyotis, absent in Rhabdocosma; gnathos acuminate medially, up-curved in Stachyotis, with linguiform medial plate in Rhabdocosma; and saccus longer in Stachyotis than in Rhabdocosma.
since 1959 and has owned Gnathos Dental Laboratory, a private laboratory and research facility specializing in high-level ceramics, for more than 30 years.
a) lateral view of tegumen, saccus, uncus, gnathos and valve; b) opposite view of right valve; c) dorsal view of tegumen, fenestra and uncus; d) posterior view of fultura inferior; e) lateral (above), ventral (middle) and dorsal (below) views of aedeagus.
strigipennis Moore in external morphology, but can be distinguished from it by the following features: the forewing has a brownish black line stretching from the apical angle to the outer side of inner margin; the oblique lines running from the apex of forewing to hindwing are more prominent; basal part of hindwing paler; the uncus wider, with 3 processes, middle one forked apically, and other 2 digitate; the gnathos has peg-like teeth; the valva shorter and broader; the harpe finger-shaped, sclerotized, broad at base, and with a minute apical hook; the aedeagus shorter, and with a crescent-shaped cornutus basally.
2-4): Uncus and tegument broad, oblong; gnathos undeveloped; valva triangular; dorsal half and distal field with long hairlike setae; medial field with short strong setae; sacculus densely covered with strong short setae; saccus longer than vinculum, basally round; aedeagus elongate; coecum penis ventrally sclerotized, dorsally membranous; vesica long, covered with numerous minute tile-shape cornuti.
sasivarna in longer and narrower forewings (length 20 mm), linear and shorter male stigma (about 2 mm, extending obliquely from vein 2 to vein 3) and genitalia (the formations of the gnathos and uncus).