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

description: 17. Oreda maculata, new species (pl. 2, <i>F).</i> Derm black, quite shiny where exposed; densely squamose above and below, scaling colored as follows: head and rostrum with white or yellowish and black scales intermixed; prothorax black with a patch of yellowish or white scales on either side of apex, scales in discal fovea pale, with a pale patch on each side in line with discal foveae, a short pale prescutellar vitta and with pale scaling at base at least in front of elytral intervals 4 and 5; elytra mostly black but with a scattering of small patches or species of white or yellowish and with a large, conspicuous, pale, irregular macula consisting of brownish yellow scales beginning at the base on the first two intervals and extending to near middle, but broadening out and extending laterally over intervals 3 to 5 behind their basal fascicles or calli and usually with a distinct pale patch at apex of interval 5; legs with femora with a pale band at base and usually a pale, dorsal, subapical patch and fleclced with pale, but otherwise black, tibiae with apical half or third mostly pale, otherwise black; scaling below usually predominantly white, but with a variable amount of black scaling. <i>Head</i> densely punctured, derm concealed by scaling; interocular area slightly expanded from top of eyes to base of rostrum, coarsely punctate, squamae erect or suberect; inner and dorsal margins of eyes making almost right angles (when viewed from front). <i>Rostrum</i> coarsely and densely sculptured and densely squamose almost to apex in male, only at base in female; not carinate. <i>Antemiae</i> with scape about as long as first five funicular segments; funicle with segment 1 as long as 2 plus three fourths of 3, 2 as long as. 3 plus half of 4, 3 slightly longer than 4, <i>4-7</i> moniliform and each successively broader, 7, i:transverse; club ovate, about twice as long as broad and not quite as long as preceding six funicular segments. <i>Prothora:r</i> slightly broader than long (4.5:4), broadest at middle, strongly rounded on sides in basal two thirds but almost straightly expanded in basal half, thence quite strongly constricted, constriction continued broadly across dorsum, base concave on either side of middle, the postero-lateral angles projecting back against elytral interval 6; puncturation coarse, deep, very dense, subconfluent, the interstices densely clothed with erect or suberect squamae; dorsum irregular, gibbose at base, median line deeply impressed across gibbose part in basal fourth, disk with a rounded, shallow fovea on either side of median line at middle. <i>Elytra.</i> two thirds as broad as long, twice as long as prothorax, almost parallel-sided from base to between middle and two thirds, thence roundly narrowed to above apex of fourth ventrite and there distinctly constricted; apex slightly but distinctly emarginate; base strongly convex from scutellar emargination to fifth interval and there deeply emarginate, margin bare and appearing flange-like to fourth interval, humeri rounded and prominent; dorsum depressed on area covered by the pale macula; intervals three or four times as broad as striae, except at base where striae are coarser, third, fourth, and fifth elevated at base before pale macula, third and fifth elevated beyond macula to about apex of fifth; derm almost everywhere concealed by dense scaling. <i>Legs</i> densely sculptured and squamose; femora with a small but distinct ventral tooth near outer edge at distal fourth; tibiae with tmcus well developed, tooth at inner apical angle distinct but small; hind tarsus with first segment not quite as long as 2 plus 3, 2 slightly longer than broad, 3 transverse, lobes rounded, 4 longer than 2 plus 3. <i>Sterimm.</i> with pectoral canal densely set with lanceolate squamae in prosternum, side wall of prosternal part slightly sinuous near fore margin, but not deeply incised, cavity terminating at fore margin of mesocoxae in male, slightly behind fore margin in female, receptacle with a median costa, which is developed into a tooth on male, from termination of canal to mesosternum; mesocoxae separated by slightly less than breadth of a mesocoxa, densely punctate, coxae reaching elytra. <i>Venter</i> with first ventrite roundly emarginate in middle behind, deeply and broadly concave and coarsely punctured and with erect squamae in male, flat, less coarsely punctate and with flat, prostrate, broadly lanceolate scales in female; 2 as long as 2 plus 3 in male, longer in female; 2-5 all densely clothed with broad, appressed scales. Length, <i>5-7</i> mm.; breadth, 2-3 mm. Holotype male, allotype female, and four paratypes found at Machanao under bark of <i>Elaeocarpus,</i> June 30, 1936, Swezey; and one paratype from the National Museum material labeled " Island Guam " collected by Fullaway. This black, subparallel-sided species with the large irregular elytral macula is most distinct from any other Guam weevils and can be easily recognized. This species differs in particular from the genotype, <i>Oreda notata</i> White, in that it does not have the side walls of the pectoral canal deeply notched at the subapical constriction of the prothorax so that there appears to be a tooth there. Lea (Linn. Soc. New South Wales, Proc., 24:523, 1899) in a key, used this character in a generic sense, but _I doubt that it is of generic value. The small femoral 1:eethare quite similar to those on <i>Oreda notata;</i> the other characters of generic rank are quite in keeping with those of the genotype.
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 104-105, DOI: 10.5281/zenodo.5159964