Maechidius angusticeps Arrow, 1941

Telnov, Dmitry, 2020, A revision of the Maechidiini Burmeister, 1855 (Coleoptera: Scarabaeidae: Melolonthinae) from the Indo-Australian transition zone, and the first record of the tribe west of Wallace’s Line, European Journal of Taxonomy 721, pp. 1-210 : 21-22

publication ID	https://doi.org/ 10.5852/ejt.2020.721.1127
publication LSID	lsid:zoobank.org:pub:89E62EF8-2E45-4C59-94B7-6A5603E8939B
DOI	https://doi.org/10.5281/zenodo.4344431
persistent identifier	https://treatment.plazi.org/id/1A3787F6-9D08-924E-FDA8-F971C9FD2C03
treatment provided by	Valdenar
scientific name	Maechidius angusticeps Arrow, 1941
status

Treatment

Maechidius angusticeps Arrow, 1941 View in CoL

Figs 22 View Figs 22–24 , 100 View Figs 97–108 , 200 View Figs 193–207 , 289 View Figs 286–301 , 362, 455, 576–578

Type material

Holotype INDONESIA • ♂; “Type [p, label circular, red frame] //DUTCH NEW GUINEA: Humboldt Bay Dist. Bewani Mts. 400 meters. Vii.1937 [p] // W.Süber. B.M.1938-177. [p]// Maechidius angusticeps Arrow type [h]”; BMNH.

Description

Dorsum and venter uniformly black-brown, labroclypeus castaneous brown. Male labroclypeus broadly emarginate, anterolateral angles obtuse angulate, protruding anteriad ( Fig. 100 View Figs 97–108 ), its lateral margins strongly sinuous in lateral view. Punctures of frons ovoid, deep. Setae inconspicuous, scale-like, narrow and short (not or hardly surpassing length of corresponding punctures), each seta rises from anterior margin of corresponding puncture. Lateral margin of pronotum broadly rounded, shallowly emarginate prebasally, delicately crenulate all along ( Fig. 200 View Figs 193–207 ). Appressed scale-like clavate seta present between every two crenulae. Lateral margin of pronotum sinuous in lateral view. Hypomeron sinuous, long setose opposite to compound eye, flange-like. Antennal pocket deep. Punctures larger and deeper than those on head. Intervening spaces glossy, narrow, wrinkled. All setae much shorter than corresponding punctures, each seta rises from anterior margin of corresponding puncture. Basal margin laterally with fringe of longer clavate scale-like setae. Lateral margins, antero- and posterolateral angles completely covered with microscopical velvety pubescence. Punctures of elytra ovoid, irregular in size, less deep than those on forebody ( Fig. 289 View Figs 286–301 ). Elytral setae generally very short (only few setae are as long as corresponding punctures), each seta rises from anterior margin of corresponding puncture. Most of punctures partly or completely encircled by delicate and extremely short velvety pubescence, composing circular to subcircular patterns around perimeter of punctures. Male pygidium slightly convex dorsally, with dense ovoid deep punctures and suberect scale-like clavate setae not or hardly surpassing length of corresponding punctures ( Fig. 455 View Figs 451–468 ). Male protibia with flat dorsal carina and two distal teeth on external margin (Fig. 362). Male upper metatibial terminal spur longer than half length of male basal metatarsomere, surpassing distal margin of metatibia in dorsal view. Male aedeagus as in Figs 576–578 View Figs 570–585 .

Sexual dimorphism

Female is unknown.