Amblycnemus dentipes Zimmerman 1942, new species
Creators: name: Zimmerman, Elwood C.
Publisher: name: Zenodo
Year: 1942
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Curculionidae
Amblycnemus
Amblycnemus dentipes

description: 12. Amblycnemus dentipes, new species (pl. 6, <i>F).</i> Derm black, with antennae, apices of tibiae and tarsi yellowish; apex of pronotum ~nd occasionally a variable part of disk yellowish; elytra with three variable, irregular, entire or broken transverse yellow fasciae, one at base, one before, and one just behind middle, apex also often yellowish, derm varying from mostly black with but small areas of yellow to mostly yellow with small areas of black; vestiture white or pale yellow. <i>Head</i> with crown coarsely reticulate, minutely punctate, rather loosely and evenly clothed. <b>with</b> prostrate anteriorly directed squamiform setae; front with a row of curved, dorsally directed squamules along inner margins of eyes, slightly more than half breadth of an eye, measured from the front. <i>Rostntm</i> in male one fifth longer than pronotum, coarsely reticulate tlu·oughout, with three prominent striae on either side between median line and scrobes from base to near antennae bearing coarse, curved dorsally or basally inclined squamules; female with rostrum almost a third longer than pronotum, finely alutaceous and quite shiny, lateral striae, excepting one next to scrobe, finer and bearing shorter, finer, much less conspicuous setae. <i>Antennae</i> inserted at apical fifth of rostrum in male, apical fourth in female; funicle with the first segment as long as 2 plus about half of 3, 2 not quite as long as 3 plus 4, 4 longer than 5, 5 and 6 subequal, submoniliform; club about as long as preceding four funicular segments. <i>Prothora.r</i> about one fifth broader than long, broadest at about middle, strongly rounded on sides in basal two thirds then strongly constricted, constriction shallowly impressed across dorsum, apex truncate dorsally, oblique laterally, base almost truncate, but very feebly concave on either side of middle; densely and coarsely punctate throughout, interstices obviously narrower than punctures; with scattered, anteriorly directed, decumbent squamules interspersed with fine hairlike setae, squamules coarser near base. <i>Scutellum</i> rounded, convex, bare, dull. <i>Elytra</i> about two thirds as broad as long, three times as long as prothorax, gently arcuate in longitudinal dorsal outline, base shallowly bisinuate, subparallel-sided from roundly rectangular humeri to beyond middle, conjointly and broadly rounded at apex; striae br~ad and deep, their punctures subquadrate, tenth stria terminating above metacoxa; intervals distinctly convex, each with <b>a row</b> of conspicuous, posteriorly directed, curved, decumbent squamiform setae. <i>Legs</i> with the femora each with a long, narrow, sharp, strongly developed, conspicuous tooth near distal third, coarsely reticulate, coarsely but indistinctly punctate, punctures bearing conspicuous, curved, decumbent setae; all tibiae unarmed at their apices in female, mid and hind tibiae armed at inner apical angle with a distinct mucro in male. <i>Stemiim</i> with prosternal canal with low, inconspicuous side walls, cavity, as well as median post coxal piece, densely clothed with compound, feathery scales, coxae separated by about breadth of apex of antenna! scape; intercoxal process of mesosternum almost vertical at fore edge of coxae, coxae not quite separated by as much as breadth of a coxa; metasternum coarsely and densely punctate on sides, coarsely punctate along coxae and hind margin below, with disk impunctate, punctures bearing long curved setae, sclerite about as long between mid and hind coxae as breadth of a mesocoxa, intercoxal process between the mesocoxae extending almost to anterior edge of coxae. <i>Venter</i> coarsely reticulate, with scattered, shallow punctures bearing decumbent setae; first ventrite irregularly depressed at base and apex in female, broadly and continuously concave in male. Length, 1.7-1.8 mm.; breadth, 0.7-0.8 mm. Holotype male, Inarajan, May 7, 1936, Usinger; allotype female, Mt. Alifan, from <i>Asplenium nidus,</i> May 26, Swezey; and the following paratypes: one with identical data as the holotype; one, Paasan, June 15, Usinger; two, Machanao, June 30, Usinger; and one, Dededo, from <i>Ochrosia,</i> Sept. 11, Swezey. This species is smaller, narrower, differently colored, and otherwise quite distinct from the only other described species of the genus. There is no other Guam weevil with which it might be confused.
description: Published as part of <i>Zimmerman, Elwood C., 1942, Curculionidae of Guam, pp. 73-146 in Insects of Guam I, Honolulu, Hawaii :Bernice P. Bishop Museum</i> on pages 96-97, DOI: 10.5281/zenodo.5159964