Maechidius boessnecki, Telnov, 2020

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 : 31-33

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.4344531
persistent identifier	https://treatment.plazi.org/id/C4A68BE8-8247-4C13-93A5-DEB150FB8B09
taxon LSID	lsid:zoobank.org:act:C4A68BE8-8247-4C13-93A5-DEB150FB8B09
treatment provided by	Valdenar
scientific name	Maechidius boessnecki
status	sp. nov.

Treatment

Maechidius boessnecki View in CoL sp. nov.

urn:lsid:zoobank.org:act:C4A68BE8-8247-4C13-93A5-DEB150FB8B09

Figs 28 View Figs 28–30 , 105 View Figs 97–108 , 205 View Figs 193–207 , 295 View Figs 286–301 , 367, 461, 589–591

Differential diagnosis

This species differs from all congeners in the shape of the aedeagus.

Etymology

Patronymic. This species is named in honour of Ulrich Bössneck (4 Mar. 1960 – 13 Sep. 2019; Erfurt, Germany), a famous malacologist, respected colleague and my friend.

Type material

Holotype

INDONESIA • ♂; “Drs. Sarasin N. Celebes [p] Matinang [h]// 10575. [h, label yellowish]// Staatl. Museum für Tierkunde Dresden [p]”; SNSD.

Description

MEASUREMENTS. Holotype, total body length 8.45 mm. Head 1.70 mm long, across eyes 1.80 mm wide. Pronotum 1.80 mm long, maximum width 2.90 mm. Elytral length 4.95 mm, maximum combined width 3.15 mm.

Dorsum black-brown, labroclypeus, antennae, legs and venter brown. Head glossy dorsally, slightly convex on frons. Male labroclypeus ( Fig. 105 View Figs 97–108 ) very shallowly broadly emarginate on anterior margin, its lateral margins slightly sinuous in both dorsal and lateral views. Anterolateral angles of labroclypeus obtuse, hardly protruding anteriad. Compound eye large, occupy about half side of head. Canthus nearly straight in dorsal view. Head punctures ovoid, deep and dense, filled with microscopical velvety pubescence. Intervening spaces glossy, much smaller than punctures. Head setae suberect, thickened, moderately long, longer on frons than on labroclypeus; each seta rises from anterior margin of corresponding puncture. Antenna 9-segmented, club 3-lamellate. Pronotum transverse, glossy dorsally and laterally. Anterior margin of pronotum broadly emarginate, basal margin very broadly rounded. Lateral margin of pronotum in dorsal view broadly rounded, maximum width slightly postmedially, crenulate all along ( Fig. 205 View Figs 193–207 ). Moderately long curved suberect seta present between every two crenulae. Lateral margin of pronotum nearly straight in lateral view. Pronotal punctures ovoid, 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. Pronotal setae inconspicuous, suberect; each seta rises from anterior margin of corresponding puncture, surpassing its length. Hypomeron flanged-like protruding, slightly emarginate and long setose opposite to compound eye. Antennal pocket deep. Elytron glabrous, with vague track of one glabrous longitudinal carina. Sutural carina not indicated. Elytral punctures irregularly ovoid, deep and dense, filled with microscopical velvety pubescence ( Fig. 295 View Figs 286–301 ), those on elytral disc arranged in 12 in part irregular longitudinal rows, those along lateral sides confused. Intervening spaces glossy, generally larger than punctures. Setae of elytra inconspicuous, appressed; minute seta rises from anterior margin of each puncture, not surpassing its length ( Fig. 295 View Figs 286–301 ). Several longer suberect setae arranged in 5–6 inconspicuous longitudinal rows. Lateral margin of elytron with row of short suberect setae. Male pygidium flattened dorsally, with moderately large dense annular punctures ( Fig. 461 View Figs 451–468 ). Setae of pygidium rise from anterior margin of corresponding punctures, generally suberect to erect and longer than corresponding punctures. Male protibia with two distal teeth on external margin, of which distal one acute (Fig. 367). Male protibial terminal spur strongly curved. Spiculum gastrale as in Fig. 461 View Figs 451–468 . Aedeagus as in Figs 589–591 View Figs 586–600 .