Maechidius peregrinus Lansberge 1886
Creators: name: Telnov, Dmitry
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Maechidius
Maechidius peregrinus

description: Maechidius peregrinus Lansberge, 1886
Figs 73, 162, 245, 276, 335, 408, 509, 691–693
Type material
Syntype
INDONESIA • ♀; South Sulawesi; NMNL. Studied from photographs.
New material
INDONESIA • 2 ♀♀; “INDONESIA, S Sulawesi, Palopo 8 km NW, Battang vill., 350 m, 2°57’S, 120°08’E, 26-28.XII.2019, at light, leg. local collector”; DTC • 1 ♀; “ INDONESIA, S Sulawesi, W of Palopo, Rantepao 7 km W, Sarambu vill., 985 m, 2°58’54”S, 119°50’18”E, at light, 28.XII.2019 ”; DTC • 1 ♂, 2 ♀♀; “ INDONESIA, S Sulawesi, Palopo 45 km SW, 5 km SW Makale, 1490 m, 3°08’32”S, 119°49’27”E, 1.I.2020 ”; DTC • 1 ♂; “ INDONESIA, S Sulawesi, Palopo 12 km NWW, Puri Rimba resort, 2°57’31”S, 120°05’13”E, 765 m, 4.I.2020, at light”; DTC • 1 ♀; “ INDONESIA, S Sulawesi, Palopo 12 km NWW, Puri Rimba resort, 2°57’31”S, 120°05’13”E, 765 m, 4.I.2020, at light”; DTC • 2 ♂♂, 3 ♀♀; “ INDONESIA, S Sulawesi, W of Palopo, Rantepao 10 km NW, Landorundun vill., 2°53’41”S, 119°50’59”E, 1430 m, at light, 14.I.2020 ”; DTC.
Description
MEASUREMENTS. Total body length 7.60–9.40 mm.
Dorsum and venter uniformly black-brown, labroclypeus, antennae and legs brown. Male (Fig. 162) and female labroclypeus shallowly emarginate to subtruncate on anterior margin, its lateral margins nearly straight to slightly sinuous in both dorsal and lateral views. Anterolateral angles of labroclypeus obtuse, rounded, not protruding anteriad. Frons convex dorsally. Head punctures ovoid to irregularly hexagonal, very deep and dense, filled with microscopical velvety pubescence. Intervening spaces glossy, generally much smaller than punctures. Head setae suberect to erect, moderately dense, much longer on frons than on anterior part of head; each seta rises from anterior margin of corresponding puncture. Pronotum strongly transverse, sinuous on anterior margin, with slightly protruding anterolateral angles. Basal margin of pronotum very broadly rounded to subtruncate. Lateral margin of pronotum broadly rounded, crenulate all along (Fig. 245). Long erect apically slightly curved seta present between every two crenulae. Maximum width of pronotum postmedially. Pronotal punctures ovoid, very deep and dense, filled with microscopical velvety pubescence. Intervening spaces glossy, much smaller than punctures, in part wrinkled. Lateral and basal margins, antero- and posterolateral angles partly covered with microscopical velvety pubescence. Setae of pronotum generally shorter than those on head, erect, apically curved; wide median prebasal area glabrous. Hypomeron broadly emarginate and very long setose on anterior margin which is flange-like (Fig. 276). Scutellar shield narrowly rounded apically. Elytron with tracks of three flat glabrous longitudinal carinae; sutural carina not indicated. Elytral punctures elongate ovoid and narrow, deep and dense. Intervening spaces glossy, generally larger than punctures, in part covered with microscopical velvety pubescence. Elytral setae suberect to erect, variably long. All setae rise from anterior margin of corresponding punctures, shorter ones about their length, longer ones much longer and arranged in longitudinal rows along tracks of elytral carinae. Male pygidium slightly convex dorsally, partly covered with microscopical velvety pubescence, with moderately large dense circular punctures and variably large intervening spaces (Fig. 509). Female pygidium with rather large obtuse median impression at posterior margin. Setae of pygidium suberect to erect, moderately long. Male and female protibia widened distally, with two obtuse distal teeth on external margin (Fig. 408). Distal margin of metatibia in both sexes with projection over basal metatarsomere. Male protibial terminal spur strongly curved, female one straight and pointed. Male lower meso- and metatibial terminal spur strongly curved, not rounded apically. Male basal metatarsomere widened and dorso-ventrally flattened. All claws with pulvilli in both sexes. Aedeagus as in Figs 691–693.
Sexual dimorphism
Lamellae of female antennal club shorter; terminal spur of protibia straight and pointed; basal metatarsomere moderately widened and flattened; pygidium humped medially; lower meso- and metatibial terminal spur not curved.
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 96-97, DOI: 10.5852/ejt.2020.721.1127, http://zenodo.org/record/4122118