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

description: Maechidius interruptocarinulatus Heller, 1914
Figs 46, 126, 219, 309, 383, 477
Type material
Holotype
INDONESIA • ♀; “Nieuw.Guinea-Expeditie 190[p] 4 Etna-bai [h] // typus ♂ [p, red label]// 1913 [p] 18 [h] // Staatl. Museum für Tierkunde.Dresden [p]”; SNSD.
New material
PAPUA NEW GUINEA • 1 ♀; “ PAPUA: Orrori 3,000ft. vii.1933. L.E.Cheesman. B.M.1933-492.”; BMNH • 1 ♀; “W.NEW GUINEA: Mt.Nomo. S.of Mt.Bougainville. 700 ft. ii.1936.// L.E.Cheesman. B.M.1936-271.”; BMNH.
INDONESIA • 1 specimen; “ DUTCH NEW GUINEA: Cyclops Mts., Sabron. 2,000 ft. vi.1936. L.E.Cheesman. B.M.1936-271.”; BMNH • 1 ♀; “Sabron Camp 2. // DUTCH NEW GUINEA: Cyclops Mts., Sabron. 2,000 ft. vi.1936. L.E.Cheesman. B.M.1936-271.”; BMNH • 1 ♀; “ DUTCH NEW GUINEA: Humboldt Bay Dist. Bewani Mts. ix.1937. [p] // W.Stüber. B.M. 1938-177.”; BMNH • 1 ♀; “N. DUTCH NEW GUINEA: Waigeu. Camp Nok. 2,500 ft. iv.1938. L.E.Cheesman. B.M.1938-593.”; BMNH.
Remarks
Heller (1914: 624) based his description of M. interruptocarinulatus on a single specimen, mentioning that the holotype was deposited at ZMHB. However, the only type specimen with label data as in the original description was allocated in SNSD and has never been deposited in ZMHB (B. Jaeger, personal communication).
Description
MEASUREMENTS. Total body length 7.40 (holotype) to 8.60 (selected specimen from Cyclops Mts.) mm.
Dorsum and venter uniformly black-brown except for brown appendages and labroclypeus. Head slightly convex dorsally on frons between eyes, glossy dorsally and ventrally. Female labroclypeus (Fig. 126) broadly emarginate anteriorly, its lateral margins nearly straight in dorsal, sinuous in lateral view. Anterolateral angles almost right-angled, not protruding, raised up at angle of nearly 80° to frons in lateral view. Anterior and lateral margins of labroclypeus smooth. Upper- and underside of labroclypeus with sparse moderately long setae along anterior and lateral margins. Canthus nearly straight in dorsal view. Punctures of frons ovoid, deep and dense; inner margin with thin membrane covered with dense microscopical velvety pubescence. Intervening spaces glossy, generally smaller than punctures. Setae inconspicuous, suberect; each seta rises from anterior margin of corresponding puncture, not or hardly surpassing its length. Antenna 9-segmented, club 3-lamellate. Pronotum transverse, glossy dorsally and laterally. Anterior margin of pronotum broadly sinuous with protruding anterolateral angles (stronger) and mesal portion (slightly), basal margin broadly rounded. Lateral margin of pronotum broadly rounded, delicately crenulate all along (Fig. 219). An appressed short seta present between every two crenulae. Lateral and basal margins, antero- and posterolateral angles partly covered with dense microscopical velvety pubescence. Lateral margin of pronotum slightly sinuous in lateral view. Hypomeron emarginate and long setose on anterior margin which is flange-like protruding. Antennal pocket deep. Punctures of pronotal disc generally larger and stronger oblong than those on head, inner margin with thin membrane covered with dense microscopical velvety pubescence. Intervening spaces glossy, in part wrinkled. Setation scale-like, appressed to suberect, short. Seta generally not surpassing length of corresponding puncture. Scutellar shield narrowly rounded apically. Elytron glossy, with five poorly defined glabrous variously broadly interrupted longitudinal carinae, including sutural one. Punctures of elytral disc ovoid, generally smaller than on forebody, deep (Fig. 309). Each puncture encircled with dense microscopical velvety pubescence. Intervening spaces glossy, in part glabrous, generally smaller than punctures. Setae inconspicuous, similar to those on pronotum, becoming longer and less appressed along longitudinal carinae. Each elytron with long lateral subhumeral seta on lateral margin. Female pygidium flattened dorsally, with vague median longitudinal impression, covered with dense microscopical fur-like velvety pubescence (Fig. 477). Punctures of pygidium dense, setae long, dense, erect, intervening spaces opaque, microreticulate. Punctures of venter narrowly surrounded by dense fur-like microscopical pubescence. Female protibia with upper longitudinal carina, slightly widened distally, with two distal teeth of which basal one is broader and stronger obtuse (Fig. 383). Female protibial terminal spur straight. Female metatibial terminal spurs rounded apically. Tarsal claws with pulvilli (in female only?).
Sexual dimorphism
Male is unknown.
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 56-58, DOI: 10.5852/ejt.2020.721.1127, http://zenodo.org/record/4122118