Miridiba Reitter 1902
Creators: name: Pham, Phu Van
name: Keith, Denis
name: Pham, Nhi Thi
name: Cao, Nga Quynh Thi
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Melolonthidae
Miridiba

description: Key to Vietnamese species of Miridiba.
Based on the key of Gao & Coca-Abia (2021), modified and updated
1. Antennae 9-segmented................................................................................ 2
- Antennae 10-segmented................................................................................ 9
2. At least some part of dorsum (head, pronotum or elytra) with pubescence......................................... 3
- Dorsum glabrous, at most, with tiny setae in each puncture, hardly visible even at high magnification.................. 5
3. Pronotum with pubescence conspicuously arranged in a longitudinal tuft in the centre of the surface. Head and elytra glabrous.................................................................................. M. sus (Moser, 1912)
- Dorsal pubescence present on whole dorsum (head, pronotum and elytra)........................................ 4
4. Pronotum with anterior margin moderately concave at lateral ends...... M. apicespinosa P.V. Pham & Keith, new species
- Pronotal anterior margin without concavities at lateral ends.............................. M. pilosella (Moser, 1908)
5. Frontal carina moderately developed..................................................................... 6
- Frontal carina sharp and strongly developed................................................................ 7
6. Posterior pronotal margin pubescent, clypeo-frontal suture not visible, antenna club almost equal length of antennomeres 2–6 combined...................................................................... M. hanoiensis Keith, 2006
- Posterior pronotal margin glabrous, clypeo-frontal suture visible, antenna club longer than length of antennomeres 2–6 combined................................................. M. quangnamensis P.V. Pham & Keith, new species
7. Pronotum with anterior margin pubescent....................................... M. tuberculipennis (Moser, 1913)
- Pronotum with anterior margin glabrous................................................................... 8
8. Metatibia with interrupted transverse carina........................................ M. ciliatipennis (Moser, 1913)
- Metatibia with complete transverse carina...................................... M. bannaensis Gao & Fang, 2018
9. Pronotal surface scattered punctate (distance between punctures greater than diameter of a single puncture)............. 10
- Pronotal surface densely punctate (distance between punctures equal or smaller than diameter of a single puncture)....... 11
10. Sutural costae of elytra developed; each elytron with 4 longitudinal flat stripes............. M. longiuscula (Moser, 1909)
- Sutural costae of elytra developed....................................................................... 12
11. Pronotal surface irregularly and coarsely punctate.................................. M. schoolmeestersi Keith, 2010
- Pronotal surface regularly punctate................................................... M. scutata (Reitter, 1902)
12. Meso-and metatibia without spines on inner margin of dorsal surface....................... M. longula (Moser, 1912)
- Meso- and metatibia with spines developed to a greater or lesser extent on inner margin of dorsal surface.............. 13
13. Parameres shorter, stout, and with several banches, the dorsal branches asymmetrical.......... M. enigmatica Keith, 2020
- Parameres longer, more or less slender, and with two symmetrical branches (dorsal and ventral branches).............. 14
14. Parameres with dorsal and ventral branches separated in lateral view........................................... 15
- Parameres with dorsal and ventral branches completely or partially fused by a membrane in lateral view............... 16
15. Parameres with flat collum ..................................................... M. lamellata Gao & Fang, 2019
- Parameres without collum....................................................... M. saigonensis (Moser, 1912)
16. Pronotal posterior margin pubescent in front of scutellum.............................. M. quasisinensis Keith, 2020
- Pronotal posterior margin glabrous...................................................................... 17
17. Parameres with dorsal and ventral branches only partially fused by a membrane in lateral view... M. axanensis Keith, 2020
- Parameres with dorsal and ventral branches completely fused in lateral view...................................... 8
18. Tip of parameres moderately or profusely elongated........................................................ 19
- Tip of parameres not elongated.......................................................................... 20
19. Tip of parameres moderately elongated, branches with two lobes in dorsal view ............. .. M. sinensoides Keith, 2020
- Tip of parameres profusely elongated, branches with one lobe in dorsal view............... M. parasinensis Keith, 2020
20. Parameres with angulation on interior margin in dorsal view, C-shape in lateral view............ M. sinensis (Hope, 1842)
- Parameres without angulation on interior margin in dorsal view, ½ C-shape in lateral view...................................................................................... M. ngoclinhensis P.V. Pham & Keith, new species
description: Published as part of Pham, Phu Van, Keith, Denis, Pham, Nhi Thi & Cao, Nga Quynh Thi, 2022, Threenew species ofthe genus MiridibaReitter, 1902 (Scarabaeidae: Melolonthinae) from Vietnam along with a new country record, pp. 331-342 in Zootaxa 5205 (4) on page 341, DOI: 10.11646/zootaxa.5205.4.2, http://zenodo.org/record/7306960