Maechidius maleo Telnov 2020, sp. nov.
Creators: name: Telnov, Dmitry
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Maechidius
Maechidius maleo

description: Maechidius maleo sp. nov.
urn:lsid:zoobank.org:act: 5C492B03-9C41-49A3-9D56-663F3C42574A
Figs 58, 144, 231, 322, 395, 491, 553, 661–663
Differential diagnosis
Maechidius maleo sp. nov. is peculiar among all congeners primarily in the shape of the male aedeagus.
Etymology
Named after the Maleo (Macrocephalon maleo S. Müller, 1846), the enigmatic and endangered North Sulawesi endemic megapode. Noun in apposition.
Type material
Holotype INDONESIA • ♂; “INDONESIA N-Sulawesi 1-2 km S Airmadidi, 260m N 1°22’57”, E 124°59’76”, LF 18.II.2008 leg. A. Skale (004) // Coll. A. Skale Hof, Germany”; NME.
Paratype
INDONESIA • 1 ♂; “Coll. I.R.Sc.N.B. Sulawesi: Utara – Dumoga Bone Nat. Park – Poniki Trail (1600m) Station 029 X.1985 Leg. J. Van Stalle // Coll. I.R.Sc.N.B. Don. O. Missa I.G.:33-444”; IRSN.
Description
MEASUREMENTS. Male holotype, total body length 6.35 mm. Head 1.05 mm long, across eyes 1.60 mm wide. Pronotum 1.60 mm long, maximum width 2.60 mm. Elytral length 3.70 mm, maximum combined width 3.10 mm. Paratype is 6.80 mm long.
Dorsum and venter uniformly black-brown with brown labroclypeus, antennae and legs. Head transverse, slightly convex dorsally between eyes, subopaque dorsally and ventrally, with large not prominent eyes occupying less than half side of head. Male labroclypeus (Fig. 144) broadly V-shaped emarginate on anterior margin, with lateral margins smooth, sinuous in both dorsal and lateral views. Anterolateral angles of labroclypeus protruding anteriad, nearly right-angular. Head punctures irregularly ovoid, very deep and dense. Each puncture encircled with microscopical velvety pubescence. Intervening spaces glossy, generally much smaller than punctures. Head setae dirty yellowish, generally sparse, long and erect, with some scattered minute setae not surpassing length of their corresponding punctures. Labroclypeus laterally and frontally with long sparse setae. Male antenna 9-segmented, club 3-lamellate. Scape moderately large, bulbous dorsally in distal half, provided with few long erect setae on its posterior and distal margin. Antennomere 2 short, slightly transverse. Pronotum transverse, glossy dorsally and laterally. Anterior margin of pronotum slightly sinuous with anterolateral angles (stronger) and mesal portion (slightly) protruding anteriad. Basal margin of pronotum broadly rounded. Lateral margin of pronotum broadly rounded with maximum width posterior to midlength, crenulate all along (Fig. 231). Long curved erect seta present between every two crenulae. Lateral margin of pronotum nearly straight in lateral view. Pronotal punctures ovoid, very deep and dense. Intervening spaces glossy and glabrous, much smaller than punctures. Setae similar to those on head, stronger curved and comparatively shorter. Lateral and basal margins, antero- and posterolateral angles partly covered with microscopical velvety pubescence. Hypomeron smooth, sparsely covered by circular punctures, flange-like, with large emargination opposite to compound eye (to receive canthus separating compound eye), provided with long setae. Antennal pocket deep. Scutellar shield pointed apically. Elytra cylindrical, maximum width in median third, subopaque, with rounded humeri and slightly elevated omoplates. Indistinct tracks of two flat longitudinal carinae on each elytron. Sutural carina not indicated. Elytral disc and lateral sides of elytra with dense and deep ovoid punctures; perimeters of many punctures completely or partly encircled with microscopical velvety pubescence (Fig. 322). Intervening spaces glossy, generally smaller than punctures. Setae of two kinds on elytral disc. Very long, erect, in part clavate setae arranged in irregular longitudinal rows present on each elytron. Inconspicuous short setae rising from anterior margin of corresponding punctures and not surpassing their length positioned between longitudinal rows of longer setae. Male pygidium flattened dorsally, with deep ovoid punctures (Fig. 491). Intervening spaces variably large, covered with dense microscopical pubescence. Setae of pygidium erect, long, in part clavate. Male protibia with two inconspicuous distal teeth on external margin (Fig. 395). Male lower meso- and metatibial terminal spur strongly curved. Distal margin of male metatibia with projection over basal metatarsomere. Male basal metatarsomere widened and dorso-ventrally flattened. Claws with pulvilli (in males only?). Spiculum gastrale as in Fig. 553. Male aedeagus as in Figs 661–663.
Sexual dimorphism
Female is unknown.
Ecology
Occurs in lowland up to mid-montane rainforests. Possibly nocturnal (holotype was attracted to light).
Distribution
Hitherto only known from North Sulawesi.
description: Published as part of 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, pp. 1-210 in European Journal of Taxonomy 721 on pages 75-77, DOI: 10.5852/ejt.2020.721.1127, http://zenodo.org/record/4122118