Maechidiini Burmeister 1855
Creators: name: Prokofiev, Artem M.
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scarabaeidae

description: Emendations to Telnov’s (2020) key to the maechidiine species from the Indo-Australian transitional zone and Bali
4. Elytra without tracks of longitudinal carinae; intervening spaces of elytra not transversely wrinkled................................................................................................ M. paralellicollis Moser, 1920
– Elytra with vague tracks of longitudinal carinae; intervening spaces of elytra transversely wrinkled................... 4A
4A. Punctures of head and pronotum ovoid, with fur-like micropubescence; about 16 denticles along lateral sides of pronotum....................................................................... M. astrolabius Prokofiev, new species
– Punctures of head and pronotum annular, lacking micropubescence; 19–25 crenulae along lateral sides of pronotum..... 4B
4B. 19–20 crenulae along lateral sides of pronotum........................................ M. humeralis Heller, 1914
– 24–25 crenulae along lateral sides of pronotum............................. M. acutus (Narakusumo & Balke, 2019)
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9. Hypomeron separated from prosternum by low straight carina................................................ 9A
– Hypomeron almost fused to prosternum............................................... M. rugicollis Moser, 1920
9A. Aedeagus as on Figs. 5C–D................................................ M. echinoides Prokofiev, new species
– Aedeagus as in Telnov (2020: figs. 614–616)............................................... M. esau Heller, 1914
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12. Underside of male’s basal metatarsomere with a long setae which are not brush-like arranged and rather suberect; aedeagus as in Telnov (2020: 709 – 711) ........................................................... M. similis Telnov, 2020
– Underside or margins of male’s basal metatarsomere with a brush of long (sub)erect setae.......................... 13
13. Abdominal ventrites medially with golden (sub)erect setae; intervening spaces of elytra densely microreticulate............................................................................................ M. tarsalis Arrow, 1941
– Abdominal ventrites without golden (sub)erect setae (small and poorly delimited patches of thickened setae can present medially on anteriormost two abdominal ventrites, then intervening spaces of elytra glossy).............................. 13A
13A. Elytra without longitudinal carinae; intervening spaces of elytra distinctly microreticulate, forming a silky appearance; aedeagus as on Figs. 7D–E....................................................... M. macrosoma Prokofiev, new species
– Elytra with more or less expressed longitudinal carinae; intervening spaces of elytra glossy to wrinkled in part, not silky in appearance....................................................................................... 13B
13B. Somewhat enlarged setae in irregular longitudinal rows on elytra; ventrolateral margins of male’s first metatarsomere with a brush of very long setae (nearly as long as tarsomere) (Fig. 8A); aedeagus as in Telnov (2020: 620–622) ................................................................................................. M. hirtipes Arrow, 1941
– No enlarged setae in longitudinal row on elytra; ventrolateral margins of male’s first to third metatarsomeres with a brush of long setae (but distinctly shorter than the length of tarsomere) (Fig. 9D); aedeagus of different shape................. 13C
13С. Longitudinal carinae on elytral disc incomplete, not extending past mid-length of elytron (Fig. 8B); no medial tubercles or patches of setae on anteriormost two abdominal ventrites; aedeagus as in Telnov (2020: 724–725) ................................................................................................... M. subcostatus Heller, 1895
– Longitudinal carinae on elytra complete; small patches of stiffened yellowish setae on weak protuberance medially on anteriormost two abdominal ventrites (Fig. 9B); aedeagus as in Figs. 9E–F......... M. penicilliger Prokofiev, new species
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15. Body with solid coating of microscopical velvety pubescence; tips of parameres crossing each other........................................................................................... M. addarcis Prokofiev, new species
– No solid coating of microscopical velvety pubescence on body; tips of parameres not crossing each other ….......... 15A
15A. See couplet 15 in Telnov (2020).
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20. Parameres slender, narrowed toward apex................................................................ 21
– Parameres broad................................................................................... 20A
20A. Elytral puncturation not forming the irregularly paired rows of punctures; aedeagus as in Figs. 3C–D........................................................................................ M. bombycinus Prokofiev, new species
– Elytral puncturation forming the irregularly paired rows of punctures; aedeagus as in Telnov (2020: figs. 679–680).................................................................................. M. nepenthephilus Telnov, 2020
***
56. Species from Sulawesi ................................................................................ 57
– Species from New Guinea ............................................................................ 56A
56A. Body matt; abdomen strongly concave in profile; protibial spur absent in male (Fig. 11C); aedeagus as in Figs. 11D–E ............................................................................ .. M. telnovi Prokofiev, new species
– Body glossy; abdomen almost straight in profile; protibial spur present in male (Fig. 12C); aedeagus as in Telnov (2020: figs. 673–675)........................................................................ M. muticus Arrow, 1941
description: Published as part of Prokofiev, Artem M., 2022, New species and records of Maechidius Macleay, 1819 from New Guinea (Coleoptera: Scarabaeidae: Melolonthinae), pp. 445-462 in Zootaxa 5205 (5) on pages 461-462, DOI: 10.11646/zootaxa.5205.5.3, http://zenodo.org/record/7318489