Maechidius miklouhomaclayi, Telnov, 2020

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 : 78-80

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.4344455
persistent identifier	https://treatment.plazi.org/id/67684347-0780-41AA-84B2-11503C8E04F0
taxon LSID	lsid:zoobank.org:act:67684347-0780-41AA-84B2-11503C8E04F0
treatment provided by	Valdenar
scientific name	Maechidius miklouhomaclayi
status	sp. nov.

Treatment

Maechidius miklouhomaclayi View in CoL sp. nov.

urn:lsid:zoobank.org:act:67684347-0780-41AA-84B2-11503C8E04F0

Figs 59 View Figs 58–61 , 146 View Figs 145–156 , 234 View Figs 226–241 , 324 View Figs 317–332 , 397, 493, 554, 667–669

Differential diagnosis

This new species differs from all congeners primarily in the shape of the aedeagus.

Etymology

Patronymic. This species named in honour of Nicholas Miklouho-Maclay (1846–1888), a famous Russian explorer, ethnologist, anthropologist and biologist who was the first European to settle among and study the indigenous people in what is now Madang Province of Papua New Guinea.

Type material

Holotype

PAPUA NEW GUINEA • ♂; “Collection Naturhistorisches Museum Basel // Papua New Guinea Madang Prov. L. Cizek lgt.// Salemben village 145°24’E 4°42’S 16.XII. 2000, 750 m”; NHMB.

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Description

MEASUREMENTS. Male holotype, total body length 6.60 mm. Head 1.30 mm long, across eyes 1.50 mm wide. Pronotum 1.50 mm long, maximum width 2.50 mm. Elytral length 3.80 mm, maximum combined width 3.05 mm.

Dorsum and venter uniformly black-brown, labroclypeus castaneous brown. Head transverse, subopaque, slightly convex dorsally. Compound eyes large and globose, occupying more than a half of head length. Male labroclypeus ( Fig. 146 View Figs 145–156 ) broadly shallowly emarginate, anterolateral angles of labroclypeus acute, rather strongly protruding anteriad, its lateral margins sinuous in both dorsal and lateral views. Canthus nearly straight in dorsal view. Head punctures ovoid, very deep and dense, variably large, filled with dense microscopical velvety pubescence. Intervening spaces glossy, generally much smaller than punctures. At least labroclypeus and areas around either compound eye covered with microscopical velvety pubescence. Head setae inconspicuous, scale-like and in part clavate, rise from anterior margin of corresponding punctures, not or slightly surpassing their length. Pronotum strongly transverse, subopaque dorsally. Anterior margin of pronotum broadly emarginate with protruding anterolateral angles, basal margin broadly rounded. Lateral margin of pronotum in dorsal view very broadly rounded, slightly constricted prebasally, crenulate all along ( Fig. 234 View Figs 226–241 ). Suberect scale-like clavate seta present between every two crenulae. Lateral margin of pronotum nearly straight in lateral view. Very vague circular dorsal impression on either side of pronotum on axis of compound eye. Hypomeron shallowly emarginate and long setose on anterior margin which is flange-like protruding. Antennal pocket deep. Median anterior process of prosternum long brushy setose, short, flange-like raised. Pronotal punctures stronger oblong, very deep and dense, filled with dense microscopical velvety pubescence, on sides of pronotum larger than those on head. Intervening spaces glossy, narrow, in part wrinkled. Pronotal setae minute, shorter than their corresponding punctures; each seta rises from anterior margin of corresponding puncture. Basal margin all along with row of curved scale-like clavate setae. Lateral margins, antero- and posterolateral angles completely covered with microscopical velvety pubescence. Elytra cylindrical, subopaque dorsally, each elytron with vague tracks of three longitudinal carinae including sutural one. Punctures of elytra ovoid, confused, variably large, deep and in part filled with microscopical velvety pubescence ( Fig. 324 View Figs 317–332 ). Elytral setae generally minute, scale-like, appressed; each seta arises from anterior margin of corresponding puncture, generally not surpassing half its length. Male pygidium flattened dorsally, densely coarsely irregularly punctured with glossy intervening spaces variably large ( Fig. 493 View Figs487–503 ). Setae of pygidium inconspicuous, sparse, scale-like, suberect. Male protibia with two acute distal teeth on external margin (Fig. 397). Male terminal protibial spur slender, slightly curved (Fig. 397). Distal margin of metatibia in both sexes with projection over basal metatarsomere. Upper metatibial terminal spur half length of male basal metatarsomere, not surpassing distal margin of metatibia in dorsal view. Spiculum gastrale as in Fig. 554 View Figs 545–569 . Aedeagus as in Figs 667–669 View Figs 667–681 .