Magdalis (Laemosaccidius) dorsalis Lu and Zhang

Lu, Xiuxia, Legalov, Anderi A. & Zhang, Runzhi, 2005, A New Subgenus And Two New Species Of Magdalis Germar From Northern China (Coleoptera: Curculionidae: Magdalinae), The Coleopterists Bulletin 59 (3), pp. 369-378 : 375-377

Magdalis (Laemosaccidius) dorsalis Lu and Zhang , new species

( Figs. 3, 4)

Holotype. China. Yuquan : Male. [Yuquan (near Harbin City, formerly called Ercengdianzi,) (45.4N, 127.1E), Heilongjiang Province, China, 1941.VI.15–22, collector unknown.]

Paratype. China. Huairou : Male. [Mt. Labagoumen (40.5N, 116.4E), 850–900 m, Huairou, Beijing, China, 2002. VI.20, Leg. Ren Li]

Diagnosis. Body black, dull. Front coxae separated. Rostrum short and stout, longer than head but shorter than prothorax. Antennae inserted near middle of the rostrum. Funicle 7-segmented, shorter than club, 1st segment broader than others, about as long as the 2nd segment. Prothorax constricted and depressed at apex, broadest at middle, median carina distinct; middle of the lateral margin with three denticles of the same size; basal half of the disk near median carina with distinct protuberance. Mesoepisternum, mesepimeron, metepisternum, metepimeron covered with dense pubescence. Scutellum on the same plane as elytra, not completely filling space between elytral bases and pronotum. Elytral striae and intervals each with one row of brown pubescence, pubescence on intervals more distinct; striae narrower, straight, punctures deeply; intervals moderately convex, rugose, without punctures, broader than striae. Femora and tibiae with moderately dense, white, long pubescence. Front femur with one small tooth. Claws each with a basal tooth.

Description. Male ( Fig. 3). Elongate-oblong. Length 3.0 mm. Body black, dull; antennae and tarsi dark brown, apical of tibiae brown. Head ( Fig. 4A) length 0.3 mm. Dorsal part shagreened, with sparse punctures; eyes transverse, yellow, large and flat; interocular space 1/4 width of base of rostrum, moderately convex; frons without median fovea. Rostrum ( Fig. 4A) length 0.5 mm, short and stout, with brown pubscence, longer than head but shorter than prothorax, cylindrical; parallel-sided from dorsal aspect and very slightly tapered anteriorly from lateral aspect, shagreened behind antennal insertion, remaining part sparsely punctate, apically and ventrally with long setae. Antenna ( Fig. 4C) inserted near middle of rostrum. Antennal scrobe obliquely directed ventral, not reaching lower ocular margin. Antennal scape weakly bent, apex broadened, length 0.3 mm; funicle length 0.4 mm, longer than scape but shorter than antennal club, 7-segmented, covered with long white pubescence; 1st flagellar segment wider than others, nearly as wide as apex of scape, about as long as the 2nd segment, 2nd segment narrowest; 3rd segment as long as 7th segment; 4th–6th segment nearly equal in length, from 3rd to 7th segment gradually slightly dilated, 7th segment indistinctly separated from antennal club; funicle with proportion in length from base as 8:8:4:3:3:3:4; club length 0.5 mm, elongate oval, 3 segments, longer than funicle combined, clothed with erect white pubescence, club with proportion in length from base as 4:6:10. Prothorax ( Fig. 4B) 1.4 times as wide as long, apex constricted and depressed, broadest at middle, median carina distinct; three equally large denticles near middle of the sides; basal half of disc near median carina with distinct protuberance; disk with dense, close and large punctures; base of prothorax bisinuate; hind angles expanded, acute. Mesoepisternum, mesepimeron, metepisternum, metepimeron covered with dense pubescence. Scutellum liguliform, on the same plane as elytra, covered with punctures, not completely filling space between elytral bases and pronotum. Elytra length 1.9 mm, width 1.7 mm, 1.1 times longer than width. Disc covered with brown pubescence; sides nearly parallel from base to declivity; base of elytra slightly wider than posterior of prothorax; basal margins around scutellum and suture elevated weakly; striae and intervals each with one row of brown pubescence, pubescence on intervals more distinct; striae narrower, straight, with deep punctures; intervals moderately convex, rugose, without punctures, wider than striae. Legs ( Fig. 4D) femora and tibiae with moderately dense white and long pubescence. Front femur with one small tooth; tip of tibiae with strongly uncinate, inner margins of tibiae slightly bisinuate, with dense and long setae; tarsi spongy beneath, 3rd segment broader, bilobed, 1st segment longer than others, claws each with a basal tooth. Venter covered with dense white pubescence and punctures; abdominal sternum 1 and 2 wider, slightly depressed at middle. Coxae separated. Genitalia ( Fig. 4E–F) aedeagus cylindrical, surface smooth. Female unknown.

Host Plant. Unknown.

Remarks. This new species is similar to M. (Laemosaccidius) alni Voss , but differs by the following characters: sides of pronotum near middle each with three denticles, elytra intervals rugose, without punctures. This new species is also similar to M. dieckmanni Barrios and Egorov. The main differences are: front coxae separated; scutellum on the same plane as elytra; and 1st segment of funicle as long as the 2nd.

Etymology. The specific epithet is derived from the dorsal characters of pronotum and elytra specifically the protuberance on the pronotum and pubescence on the elytra.