Maechidius parallelicollis Moser, 1920

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 : 90

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.4344453
persistent identifier	https://treatment.plazi.org/id/1A3787F6-9D45-9202-FDA3-FEB6C9FD2F47
treatment provided by	Valdenar
scientific name	Maechidius parallelicollis Moser, 1920
status

Treatment

Maechidius parallelicollis Moser, 1920 View in CoL

Figs 69 View Figs 66–69 , 157 View Figs 157–168 , 241 View Figs 226–241 , 332 View Figs 317–332 , 503 View Figs487–503

Type material

Lectotype [herewith designated]

INDONESIA • ♂; “Roon [p] // Maechidius parallelicollis Mos. Type [h] // SYNTYPE Maechidius parallelicollis Moser, 1920 labelled by MFNB 2019 View Materials [p, red label]”; ZMHB [forelegs are completely missing].

Remarks

Moser (1920: 15) based his description of M. parallelicollis on an unstated number of specimens. The lectotype is therefore designated for the single syntype in ZMHB 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 7.45 mm (lectotype).

Dorsum and venter uniformly brown except for paler appendages and antennae. Head flattened dorsally on frons between eyes, glossy dorsally and ventrally. Male labroclypeus ( Fig. 157 View Figs 157–168 ) shallowly and very broadly emarginate anteriorly, its lateral margins sinuous in both dorsal and lateral views. Anterolateral angles almost right-angled, hardly protruding, raised up at angle of nearly 90–95° 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 slightly sinuous in dorsal view. Punctures of frons large, of irregular shape, annular, shallow and dense. Intervening spaces glossy, distinctly smaller than punctures. Each seta rises from anterior margin of corresponding puncture. Male antenna 9-segmented, club 3-lamellate. Pronotum transverse, glossy dorsally and laterally. Anterior margin of pronotum broadly emarginate with protruding anterolateral angles, basal margin slightly sinuous. Lateral margin of pronotum nearly straight, delicately crenulate all along (about 20 flat crenulae on either side) ( Fig. 241 View Figs 226–241 ). Inconspicuous erect seta present between every two crenulae. Lateral margin of pronotum hardly sinuous in lateral view. Hypomeron slightly arched, separated from prosternum by moderately high partly acute carina. Antennal pocket moderately deep. Pronotal punctures larger than those on head, annular, stronger ovoid at lateral sides and base. Setae inconspicuous, erect, hardly surpassing length of corresponding punctures. Scutellar shield narrowly rounded apically. Elytron subopaque, without tracks of longitudinal carinae. Elytral punctures very elongate and narrow, dense, incision-shaped ( Fig. 332 View Figs 317–332 ). Setae inconspicuous, not surpassing length of corresponding punctures, appressed. Male pygidium slightly convex dorsally, densely annularly punctate and with short erect setae ( Fig. 503 View Figs487–503 ). Male metatibial terminal spurs long, subequal in length. Tarsal claws with pulvilli at least on middle and posterior legs (in male only?).

Sexual dimorphism

Female is unknown.