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

description: Maechidius suwawa sp. nov.
urn:lsid:zoobank.org:act: 1B489847-69C1-47B5-90F7-AC360EC1E7D2
Figs 89, 184–185, 258, 349, 421, 525, 564, 726–729
Differential diagnosis
The new species is most similar to M. peregrinus Lansberge, 1886, M. babyrousa sp. nov., M. deltouri sp. nov. and M. legalovi sp. nov. (all from Sulawesi). This new species readily differs from them and other congeners only in the shape of the male genital organs and the labroclypeus.
Etymology
The name derives from Suwawa, one of the native languages spoken in the Bogani Nani Wartabone National park, northern Sulawesi. Noun in apposition.
Type material
Holotype
INDONESIA • ♂; “INDONESIA: SULAWESI UTARA, Dumoga-Bone N.P. April 1985.// Rothamsted light trap, site 1, 200m. H.Barlow // R.Ent.Soc.Lond. PROJECT WALLACE B.M. 1985-10// 44.16 [light green label]”; BMNH.
Paratypes (4 specimens)
INDONESIA • 1 ♂; “INDONESIA: SULAWESI UTARA, Dumoga-Bone N.P. February 1985. // Site 9, 492 m. Tumpah Transect J.D.Holloway // R. Ent.Soc.Lond. PROJECT WALLACE B.M. 1985-10”; BMNH • 1 ♂; “ INDONESIA: SULAWESI UTARA, Dumoga-Bone N.P. // Site 8, 440 m. Tumpah Transect J.D.Holloway 12-13.ii.1985 // R. Ent.Soc.Lond. PROJECT WALLACE B.M. 1985-10”; BMNH • 1 ♂; “ INDONESIA: SULAWESI UTARA, Dumoga-Bone N.P. 7 February 1985.// Site 5, 300 m. Tumpah Transect J.D.Holloway 6.ii.1985 [sic ♂] // R. Ent.Soc.Lond. PROJECT WALLACE B.M. 1985- 10”; BMNH • 1 ♀; “ INDONESIA: SULAWESI UTARA, Dumoga-Bone N.P. February 1985.// Site 5, 300 m. Tumpah Transect J.D.Holloway 6.ii.1985 // R. Ent.Soc.Lond. PROJECT WALLACE B.M. 1985- 10”; BMNH.
Description
MEASUREMENTS (exposed abdominal ventrites not included). Male holotype, total body length 6.70 mm. Head 1.30 mm long, across eyes 1.60 mm wide. Pronotum 1.50 mm long, maximum width 2.60 mm. Elytral length 3.90 mm, maximum combined width 3.15 mm. Female paratype, total body length 6.70 mm. Head 1.20 mm long, across eyes 1.80 mm wide. Pronotum 1.80 mm long, maximum width 2.90 mm. Elytral length 4.70 mm, maximum combined width 3.50 mm.
Dorsum uniformly brown with castaneous labroclypeus, mouthparts, legs and venter. Head transverse, trapezoid, slightly convex on vertex in lateral view, glossy dorsally and ventrally, with large not prominent compound eyes occupying more than half side of head. Male labroclypeus (Fig. 184) almost straight anteriorly, its lateral margins smooth, slightly sinuous in both dorsal and lateral views. Anterolateral angles shortly protruding anteriad, obtuse, bent up almost perpendicularly with regard to axis of frons (in lateral view). Female labroclypeus (Fig. 185) shallowly emarginate on anterior margin, with obtuse and not protruding anterolateral angles. Head punctures irregularly shaped, somewhat smaller in anterior, larger in posterior half. Intervening spaces glossy, smaller than punctures. Pubescence dirty yellow, rather long and erect but sparse, rising from each puncture. Setae somewhat hook-like curved apically, sparse, moderately long. Labroclypeus laterally and frontally with more delicate and shorter yellowish setae. Antenna 9-segmented. Scape large, widened on upper side in distal half, provided with few long erect setae on its posterior and distal margin. Antennomere 2 short and transverse. Club 3-lamellate. 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 evenly broadly rounded, delicately crenulate all along (Fig. 258), nearly straight in lateral view. Long erect seta present between each of lateral crenulae and all along basal margin. Pronotal punctures circular to ovoid, deep and coarse. Intervening spaces glossy, smaller than punctures, in part wrinkled. Pronotal setae long, suberect, clavate. Hypomeron smooth, sparse punctured with circular punctures, with large emargination opposite to compound eye (to receive canthus separating compound eye) covered with long setae. Antennal pocket deep. Scutellar shield triangular, pointed apically. Elytra cylindrical, maximum combined width across median third, glossy and slightly convex dorsally, with rounded humeri and elevated omoplates. Vague tracks of two flat longitudinal carinae on each elytron. Sutural carinae shortly indicated near apices. Rather large obtuse hump on each elytron near apex. Disc and lateral sides of elytra densely punctured; punctures ovoid, less coarse and shallower than those of pronotum, arranged in irregular longitudinal rows (Fig. 349). Intervening spaces glossy, generally smaller than punctures. An inconspicuous erect to suberect scale-like seta rises from anterior margin of each puncture, surpassing or not its length. Few longer stronger erect scale-like setae scattered over elytral disc and denser on lateral sides. Epipleuron with row or two (in broad anterior part) of suberect setae. Male and female pygidium with large shallow circular punctures (Fig. 525). Abdominal ventrites glossy, covered with small annular punctures, each provided with long suberect to erect seta. Legs long and slender, femora and tibiae covered with delicate yellowish setae. Outer margins of meso- and metatibiae densely denticulate. Two strong teeth on external margin of male protibia (Fig. 421). Male lower meso- and metatibial terminal spur strongly curved. Distal margin of metatibia in both sexes with projection over basal metatarsomere. Metatibial terminal spurs shorter than basal metatarsomere in male, nearly as long as it in female. Tarsal claws with pulvilli. Spiculum gastrale as in Fig. 564. Male aedeagus as in Figs 726–728.
Sexual dimorphism
Female is generally larger; protibial spur slightly curved distally in male, straight in female; metatibial spurs somewhat longer in female than in male; lower metatibial spur curved in male, straight in female; female pulvilli narrower and shorter than in male; female lower meso- and metatibial terminal spur slender, slightly curved apically.
Ecology
Occurs in lowland rainforests. Possibly nocturnal.
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 117-119, DOI: 10.5852/ejt.2020.721.1127, http://zenodo.org/record/4122118