Atopida White
Creators: name: Kiałka, Agata
name: Ruta, Rafał
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scirtidae
Atopida

description: A key to species of Atopida
It is relatively difficult to identify species of Atopida. The main sources of problems with identification of Atopida are: significant sexual dimorphism, large infraspecific variability, similarity of male genitalia of several species groups, and the fact that bursal sclerites of females of several species are not very distinctive, often rod-like. With the following key, it is possible to identify males of all known species and females of most species (females of undescribed species of the montana complex are included). In most cases dissection of genitalia is needed, as well as examination of abdominal setal patches, bursal sclerites and hind wings of females.
1. Head and pronotum covered with adherent setae, in lateral view no semierect setae on head and pronotum can be noticed.............................................................................................. proba Sharp
-. At least head and pronotum (usually also elytra) covered with erect setae, clearly visible in lateral view................. 2
2. Male............................................................................................... 3
-. Female............................................................................................ 17
3. Punctation of pronotum not granulate......................................................... impressa Broun
-. Punctation of pronotum granulate, granulation easily noticeable at least on lateral portions of pronotum................. 4
4. Trigonium of penis very wide, bulbous (Fig. 15B)................................................. suffusa Broun
-. Trigonium never bulbous, usually narrow with subparallel sides or triangular...................................... 5
5. Pronotum widest in the middle of its length................................................................. 6
-. Pronotum widest before the middle of its length............................................................. 7
6. Trigonium shorter than parameroids (Fig. 16B), occurs in North Island.............................. waipoua sp. nov.
-. Trigonium as long as parameroids (Fig. 16C), occurs in South Island............................... walkerae sp. nov.
7. Lateral carinae of elytra crenulate, in most species penis with explanate lateral lobes............................... 8
-. Lateral carinae of elytra not crenulate, penis always without explanate lateral lobes................................ 12
8. Trigonium straight, triangular (e.g. Fig. 13A, C)............................................................. 9
-. Trigonium curved (e.g. Fig. 13D)........................................................................ 10
9. Sides of pronotum curved, projections of supraantennal ridges long (Fig. 3E), parameroids rounded at apices, outer edges not denticulate (Fig. 13A)..................................................................... lescheni sp. nov.
-. Sides of pronotum bisinuate, projections of supraantennal ridges elevated, but not forming projections, parameroids pointed at apices, outer edges denticulate (Fig. 13C)..................................................... paparoa sp. nov.
10. Apices of parameroids widened, rounded; lateral plates of penis with denticles in apical portion (Fig. 13D)...................................................................................................... paringa sp. nov.
-. Apices of parameroids triangular, pointed, lateral plates of penis without denticles in apical portion (Figs 12D, 15D)..... 11
11. Parameres narrow, triangular (Fig. 12D)...................................................... insularis sp. nov.
-. Parameres wide, subrectangular (Fig. 15D)...................................................... tuhua sp. nov.
12. Elytra covered with adherent setae....................................................................... 13
-. Elytra covered with erect setae.......................................................................... 14
13. Lateral carinae of pronotum strongly curved, penis long (Fig. 12A)................................... castanea White
-. Lateral carinae of pronotum subtly curved, penis less elongated, widest in the middle (Fig. 15C)......... suturalis (White)
14. Body on average smaller (TL 2.4–4.3 mm), narrower........................................................ 15
-. Body on average larger (4.2–5.4 mm), stouter.............................................................. 16
15. Penis very elongated (Fig. 12B), species restricted to North Island...................................... hirta Broun
-. Penis less elongated (Fig. 13B), species restricted to South Island.................................... montana Broun
16. Lateral carinae of pronotum curved, anterolateral angles slightly projecting, basal portion of elytra in females deeply excised to fit pronotal base, restricted to North Island....................................................... villosa Broun
-. Lateral carinae of pronotum bisinuate, anterolateral angles strongly projecting, basal portion of elytra in females shallowly excised to fit pronotal base, restricted to South Island....................................... westlandensis sp. nov.
17. Hind wings well developed (macropterous)................................................................ 18
-. Hind wings reduced (apterous or brachypterous)............................................................ 20
18. Small (TL 2.2–2.5 mm), dorsum covered with erect setae.............................................. hirta Broun
-. Larger (TL> 4.5 mm), dorsum covered with adherent or semi-erect setae........................................ 19
19. Basal portion of pronotum with sparse, granulate punctation, interspaces shining...................... suturalis (White)
-. Basal portion of pronotum with dense, granulate punctation........................................ castanea White
20. Apterous........................................................................................... 21
-. Brachypterous....................................................................................... 22
21. Abdomen without setal patches (Fig. 14F)............................................ cf. montana ‘Pelorus Bridge’
-. Ventrite 4 with two large, oblique setal patches (Fig. 8C), tergite VII with oval depression (Fig. 8D)........ impressa Broun
22. Setal patches present on ventrites 3 and 4................................................................. 23
-. Setal patches present only on ventrite 4................................................................... 27
23. Bursal sclerite plate-like, large (Figs 10D, F, L)............................................................ 24
-. Bursal sclerite consisting of paired rods (Figs 10E, M)....................................................... 26
24. Lateral portions of bursal sclerite with long spines in dorsal view, central portion with pair of tubercles (Fig. 10D)............................................................................................... insularis sp. nov.
-. Lateral portions of bursal sclerite without long spines in dorsal view, central portion with a single tubercle (Figs 10F, L)... 25
25. Abdominal setal patches large, transversely oblique (Fig. 8G)...................................... paparoa sp. nov.
-. Abdominal setal patches small, oval (Fig. 8M).................................................... tuhua sp. nov.
26. Abdominal setal patches small, oval, ventrite 5 rounded (Fig. 8F).................................... montana Broun
-. Abdominal setal patches large, transverse, ventrite 5 deeply emarginated (Fig. 8N)....................... villosa Broun
27. Bursal sclerite consisting of two long rods and a single, v-shaped sclerite (Fig. 10H)...................... suffusa Broun
-. Bursal sclerite consisting of two subtriangular sclerites...................................................... 28
28. Ventrite 4 with very small, puncture-like setal patches, ventrite 5 with two triangular denticles in apical portion (Fig. 14E)............................................................................... cf. montana ‘Port Underwood’
-. Ventrite 4 with larger, oval setal patches, ventrite 5 with shallow emargination (Figs 8O, 14D)....................... 29
29. Bursal sclerite with narrowly triangular sclerites (Fig. 10O)................................... westlandensis sp. nov.
-. Bursal sclerite with widely triangular sclerites (Fig. 14G)................................. cf. montana ‘Mt Robinson’
description: Published as part of Kiałka, Agata & Ruta, Rafał, 2022, Revision of Atopida White, 1846 (Coleoptera: Scirtoidea: Scirtidae), pp. 401-443 in Zootaxa 5174 (4) on pages 437-438, DOI: 10.11646/zootaxa.5174.4.6, http://zenodo.org/record/6986469