Maechidius seriegranosus Heller, 1914

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, European Journal of Taxonomy 721, pp. 1-210 : 104-105

publication ID	https://doi.org/ 10.5852/ejt.2020.721.1127
publication LSID	lsid:zoobank.org:pub:89E62EF8-2E45-4C59-94B7-6A5603E8939B
DOI	https://doi.org/10.5281/zenodo.4344479
persistent identifier	https://treatment.plazi.org/id/1A3787F6-9D7B-9233-FDBC-FE0AC9102AD4
treatment provided by	Valdenar
scientific name	Maechidius seriegranosus Heller, 1914
status

Treatment

Maechidius seriegranosus Heller, 1914 View in CoL

Figs 80 View Figs 78–81 , 171 View Figs 169–180 , 250 View Figs 242–258 , 341 View Figs 333–348 , 413, 515, 560, 706–708

Type material

Lectotype [herewith designated]

PAPUA NEW GUINEA • ♂; “ Br. N. Guinea Aroa Fl. E.Weiske [p, blue label] // 14420 [h, blue label]// Typus! [p] seriegranosus [h, red label]// Staatl. Museum für Tierkunde.Dresden [p]”; SNSD.

New material

PAPUA NEW GUINEA • 2 specs; “ Papua : Kokoda. 1,200ft. x.1933. L.E.Cheesman. B.M.1934-321.”; BMNH • 23 specs; “ PAPUA:Mondo. 5,000ft. ii.1934. L.E.Cheesman. B.M.1933-321 [&] 492.”; BMNH • 1 ♀; “ PAPUA:Mondo. 5,000ft. ii.1934. L.E.Cheesman. B.M.1933-321.// Maechidius fraterculus Moser Determined from description. G.J.A.”; BMNH .

Remarks

Heller (1914: 628) likely based his description of M. seriegranosus 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 syntypes are discovered in the future.

Description

MEASUREMENTS. Total body length 6.80 mm (lectotype).

Dorsum and venter uniformly dark brown, appendages paler brown. Head convex dorsally between compound eyes, with inconspicuous transverse impression at front margin of either eye, glossy dorsally and ventrally. Male labroclypeus ( Fig. 171 View Figs 169–180 ) deeply U-shaped emarginate on anterior margin, its lateral margins strongly sinuous in both dorsal and lateral views. Anterolateral angles rounded, strongly protruding, raised up at angle of nearly 80–90° to frons in lateral view. Anterior and lateral margins of labroclypeus smooth. Underside of labroclypeus with sparse long delicate setae along anterior and lateral margins. Canthus strongly obtusely angulate in dorsal view. Punctures of frons irregularly hexagonal, in part annular, moderately large and deep. Intervening spaces glossy, variably large. Head setae minute, appressed; each seta rises from anterior margin of corresponding puncture not surpassing its length. Antenna 9-segmented, club 3-lamellate. Pronotum transverse, flattened dorsally, glossy dorsally, opaque laterally. Anterior margin of pronotum broadly emarginate with strongly protruding anterolateral angles, basal margin sinuous. Lateral margin of pronotum very broadly rounded in dorsal view, crenulate all along except denticulate prebasal area; lateral margin with 13–15 crenulae / denticles. Inconspicuous suberect seta present between every two crenulae ( Fig. 250 View Figs 242–258 ). Lateral margin of pronotum sinuous in lateral view. Pronotal punctures irregularly ovoid to hexagonal, annular, dense, moderately deep. Intervening spaces glossy, flat. Setation as on head. Hypomeron separated from prosternum by moderately high nearly straight carina, with long setae on anterolateral margin opposite of compound eye. Antennal pocket moderately deep. Scutellar shield rounded apically. Elytron subopaque, with vague tracks of three longitudinal carinae, including sutural one. Elytral punctures sinuous (elongate and narrow), incision-shaped, shallow ( Fig. 341 View Figs 333–348 ). Intervening spaces wrinkled. Appressed to suberect seta rises from anterior margin of each puncture, not surpassing length of corresponding incision. Lateral margins of elytra in part covered with microscopical velvety pubescence. Male and female pygidium flattened dorsally, opaque, with large shallow annular punctures ( Fig. 515 View Figs 504–521 ). Intervening spaces microreticulate, much smaller than punctures. Setae of pygidium suberect, surpassing length of corresponding punctures. Male protibia widened distally, with three external teeth, median one largest (Fig. 413). Male protibial terminal spur narrow. Male metatibia distally with a brush of dense long sinuous setae. Male metatibial terminal spurs long, unequal, lower spur slightly curved. Male basal metatarsomere with a brush of dense long sinuous setae on inner margin. Tarsal claws with pulvilli. Spiculum gastrale as in Fig. 560 View Figs 545–569 . Aedeagus as in Figs 706–708 View Figs 697–711 .