Maechidius simplex Frey, 1969

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 : 109

Maechidius simplex Frey, 1969

Figs 84 , 168

Type material

Holotype

INDONESIA • ♂; “ WEST NEW GUINEA Star Mts. Sibil Val. 1245m, 18-X-8.XI- ’61 [p] // S. Quate & L. Quate Collectors [p]// TYPE [p, red label]// Type Maechidius simplex n. sp. [h] det. G.Frey,1967/68 [p]”; BPBM. Studied from photographs.

Description

Body brown, antennae and legs reddish-castaneous. Male labroclypeus subtruncate, its lateral margins slightly sinuous in dorsal view. Anterolateral angles of labroclypeus broadly rounded, not protruding ( Fig. 167 ). Canthus broadly rounded in dorsal view. Head punctures circular to irregularly ovoid, moderately deep, dense. Head setae short, scale-like, suberect, surpassing length of corresponding punctures. Pronotum broadly emarginate on anterior margin, basal margin slightly sinuous. Anterolateral angles rounded, slightly protruding. Lateral margin in dorsal view gradually widens towards obtuse postmedian angulation; constricted towards base from this point, delicately crenulate all along. Inconspicuous appressed scale-like seta present between every two crenulae. Pronotal punctures larger and deeper than those on head, in part annular. Intervening spaces subopaque, variably large, generally larger than punctures. Setation similar to on head, slightly longer. Scutellar shield narrowly rounded apically. Elytron with two rather broad flat glabrous longitudinal carinae and less distinct sutural carina. Preapical hump of elytron large but flat, somewhat Г- shaped ( Fig. 84 ). Elytral punctures sparse, moderately deep, irregularly ovoid. Intervening spaces subopaque, distinctly larger than punctures. Elytral setae inconspicuous, suberect; seta rises from anterior margin of each puncture, not or hardly surpassing its length. Male pygidium with long erect setae in apical part. Male protibia with nearly complete dorsal longitudinal furrow, with two large rounded distal teeth on external margin; distal tooth lobe-like prolonged anteriad. Male terminal protibial spur straight, long and acute. Male meso- and metatibia with interrupted median transverse carina.

Sexual dimorphism

Female is unknown.

Remark

This species’ male genital organs were not studied.

Figures

Figs 82–85. Papuan and Wallacean Maechidius Macleay, 1819, habitus, dorsal view. 82. M. similis sp. nov., paratype, ♂ (BMNH). 83. M. skalei sp. nov., paratype, ♂ (NME). 84. M. simplex Frey, 1969, holotype, ♂ (photograph courtesy BPBM) (BPBM). 85. M. sougb sp. nov., holotype, ♂ (NME). Not to scale.

Figs 157–168. Papuan and Wallacean Maechidius Macleay, 1819, head, dorsal (157–159, 161–167) and frontal (160, 168) views. 157. M. parallelicollis Moser, 1920, lectotype, ♂ (ZMHB). 158. M. paupianus Heller, 1910, lectotype, ♀ (SNSD). 159. Same, ♂ (paratype of M. arrowi Frey, 1969) (BMNH). 160. M. pauxillus Heller, 1910 comb. rest., lectotype, ♂ (SNSD). 161. Same, ♀ (SNSD). 162. M. peregrinus Lansberge, 1886, ♂ (DTC). 163. M. pedarioides Arrow, 1941, syntype, ♀ (BMNH). 164. Same, syntype, ♂ (BMNH). 165. M. riedeli sp. nov., holotype, ♂ (SMNS). 166. M. perlatus (Frey, 1969) comb. nov., holotype, ♂ (NHMB). 167. Same, ♀ (NHMB). 168. M. simplex Frey, 1969, holotype, ♂ (photograph courtesy BPBM) (BPBM). Not to scale.