Oxyserica marginata Ahrens & Liu & Lukic & Bai 2023
Creators: name: Ahrens, Dirk
name: Liu, Wangang
name: Lukic, Daniel
name: Bai, Ming
Publisher: name: Zenodo
Year: 2023
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Melolonthidae
Oxyserica
Oxyserica marginata

description: Oxyserica marginata group
Key to species of the Oxyserica marginata group (♁♁):
1 Antennal club with three antennomeres.................................................. O. elegans (Frey, 1975)
- Antennal club with more than three antennomeres............................................................ 2
2 Antennal club with six antennomeres...................................................................... 3
- Antennal club with four or five antennomeres............................................................... 4
3 Metatibia moderately wide, ratio width/length: 1/3.2. Parameres nearly symmetrical......... O. pedongensis (Ahrens, 1998)
- Metatibia wide, ratio width/length: 1/2.8. Parameres asymmetrical...................... O. marginata (Brenske, 1896)
4 Antennal club with four antennomeres..................................................................... 5
- Antennal club with five antennomeres.................................................................... 16
5 Metatarsomere one as long as dorsal metatibial spine........................................................ 10
- Metatarsomere one distinctly longer than dorsal metatibial spine................................................ 6
6 Species from Himalaya................................................................................ 11
- Species from Yunnan and Myanmar ....................................................................... 7
7 Specimen large, size> 7.2 mm. Metatibia long and narrow, ratio width/length: 1/3.5............................................................................................ O. bifascipennis Ahrens, Lukic & Liu, new species
- Specimen small, size <5.5 mm. Metatibia sorter, ratio width/length <1/3.0........................................ 8
8 Body stouter and shorter. Elytra with a single lateral dark spot.............. O. serena Ahrens, Lukic & Liu, new species
- Body more elongate. Elytra with on lateral dark spot behind middle, and one near suture on anterior quarter.............. 9
9 Dorsal lobe of left paramere exceeds the external margin of the right paramere, strongly curved backwards again towards the left side of phallobase......................................................... O. nigropicta (Fairmaire, 1891)
- Dorsal lobe of left paramere developed basally and distally, not exceeding the external margin of the right paramere................................................................................... O. diversicornis (Moser, 1915)
10 Body bi-colored, elytra yellowish brown with dark suture. Body oblong. Lateral margins of pronotum in basal half parallel.................................................................................. O. steelei (Ahrens, 2004)
- Body unicoloured. Body short oval................................................... O. pruinosa (Hope, 1831)
11 Metatibia short and wide, ratio width/length: 1/2.5.......................................................... 12
- Metatibia narrower, ratio width/length: <1/3.0............................................................. 14
12 Pronotum yellowish brown, with two dark spots. Elytra with distinct cross-like signature..... O. cechovskyi (Ahrens, 1999)
- Pronotum dark, at maximum with light lateral margins. Elytra unicoloured black, brown, or yellowish brown with dark margins............................................................................................ 13
13 Apical lobe of right paramere long.................................................. O. truncata (Brenske, 1898)
- Apical lobe of right paramere short................................................. O. bhutanensis (Frey, 1975)
14 Antennal club 1.5 times as long as remaining antennomeres combined. Metatibia narrow, ratio width/length: 1/3.8....... O. hispidula (Frey, 1975)
- Antennal club twice as long as remaining antennomeres combined and slightly reflexed. Metatibia wider, ratio width/length: 1/3.0–3.3........................................................................................... 15
15 Phallobase with a distinct dorsal sinuation before apex (lateral view)..................... O. myagdiana (Ahrens, 1998)
- Phallobase without dorsal sinuation before apex (lateral view)......................... O. gandakiensis (Ahrens, 1998)
16 Metatibia short and wide, ratio width/length: 1/2.5–2.8....................................................... 17
- Metatibia narrower, ratio width/length: 1/3.2.......................................... O. martensi (Ahrens, 1998)
17 Basal lobe of left paramere as long as paramere itself........................................................ 18
- Basal lobe of left paramere distinctly shorter than paramere itself.............................................. 19
18 Right paramere rounded at apex, left paramere short.................................. O. schawalleri (Ahrens, 1998)
- Right paramere truncate at apex and bluntly toothed, left paramere as long as right one........ O. arunensis (Ahrens, 1998)
19 Left paramere with a lateral somewhat reflexed tooth................................. O. interrogator (Arrow, 1946)
- Left paramere without lateral tooth.................................................. O. schulzei (Ahrens, 1998)
description: Published as part of Ahrens, Dirk, Liu, Wangang, Lukic, Daniel & Bai, Ming, 2023, A taxonomic review of Microserica Brenske, 1894 from continental Asia (Coleoptera: Scarabaeidae: Melolonthinae: Sericini), pp. 1-115 in Zootaxa 5241 (1) on pages 71-72, DOI: 10.11646/zootaxa.5241.1.1, http://zenodo.org/record/7639734