Maechidius woodlarkianus Heller 1914
Creators: name: Telnov, Dmitry
Publisher: name: Zenodo
Year: 2020
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae
Maechidius
Maechidius woodlarkianus

description: Maechidius woodlarkianus Heller, 1914
Fig. 95, 193–194, 264, 285, 355, 427, 533, 742–744
Type material
Lectotype [herewith designated]
PAPUA NEW GUINEA • ♀; “ Gehr. W. Müller Vermächt. 1909 [p, blue label] //Woodlark, III. IV. 97. (A. S. Meek). [p] // Typus! [p] woodlarkianus [h] // Staatl. Museum für Tierkunde Dresden [p]”; SNSD.
New material
PAPUA NEW GUINEA • 4 ♂♂; “Woodlark, III. IV. 97. (A. S. Meek). [p] // Coll. C. Felsche Kauf 20, 1918 [p, blue label]// Staatl. Museum für Tierkunde Dresden [p]”; SNSD.
Remarks
Heller (1914: 628) likely based his description of M. woodlarkianus on a single specimen, although not explicitly stated. The single SNSD specimen labelled “Typus♂” is herewith designated as lectotype in order to enhance the stability of nomenclature and fix the specimen I based my redescription on, in case other (non-conspecific) syntypes are discovered in the future. Four additional specimens with identical collecting data labels are allocated in SNSD (see Checklist). However, these specimens are not considered syntypes, because the original description of M. woodlarkianus was published in 1914, but the additional 4 specimens in question were acquired by SNSD in 1918, as their labels state (see Checklist).
Description
MEASUREMENTS. Total body length 7.10–7.20 (lectotype) to 7.60 mm.
Dorsum and venter uniformly brown, appendages and abdomen paler brown. Head flattened dorsally between compound eyes, glossy dorsally and ventrally. Male labroclypeus (Fig. 194) very broadly and shallowly emarginate anteriorly, its lateral margins nearly straight to slightly sinuous in dorsal, sinuous in lateral view, anterolateral angles of labroclypeus not projecting anteriad, raised up at angle of nearly 70–80° to frons in lateral view. Female labroclypeus (Fig. 193) similar to that of male. Anterior and lateral margins of labroclypeus smooth. Upper- and underside of labroclypeus with sparse inconspicuous setae along anterior and lateral margins. Canthus very broadly rounded in dorsal view. Punctures of frons ovoid, moderately deep and large. Intervening spaces glossy, variably large, in part wrinkled. Inconspicuous appressed seta rises from anterior margin of each puncture, not or hardly surpassing length of corresponding puncture. Antenna 9-segmented, club 3-lamellate. Pronotum transverse, flattened dorsally, glossy dorsally and laterally. Anterior margin of pronotum broadly emarginate with anterolateral angles slightly protruding anteriad. Basal margin of pronotum broadly rounded. Lateral margin or pronotum broadly rounded, crenulate all along (Fig. 264). Short suberect seta present between every two crenulae. Lateral margin of pronotum slightly arched in lateral view. Hypomeron separated from prosternum by low nearly straight carina, with long setae on anterolateral margin opposite to compound eye (Fig. 285). Antennal pocket shallow. Pronotal punctures ovoid to irregularly hexagonal, variably large and moderately deep. Intervening spaces glossy, generally larger than punctures. Setae of pronotal disc as those on head. Scutellar shield rounded apically. Elytron glossy, with tracks of four flat glabrous longitudinal carinae, including sutural one. Punctures linear (elongate and narrow), incisionshaped. Intervening spaces glossy, larger than punctures (Fig. 355). Appressed seta rises from anterior margin of each puncture, not surpassing length of corresponding incision. Male and female pygidium slightly convex dorsally, with large and shallow annular punctures (Fig. 533). Intervening spaces glossy, generally larger than punctures. Setae of pygidium inconspicuous, appressed; seta rises from anterior margin of each corresponding puncture, not surpassing its length. Longer suberect setae on apical margin of pygidium. Protibia hardly widened distally, in male with three external teeth, basal one of which rudimentary (Fig. 427). Protibial terminal spur absent in both sexes. Male metatibial terminal spurs not equal, lower spur curved. Tarsal claws with pulvilli. Male aedeagus as in Figs 742–744.
Sexual dimorphism
Female lamellae of antennal club shorter.
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 128-129, DOI: 10.5852/ejt.2020.721.1127, http://zenodo.org/record/4122118