Atopida suffusa Broun 1910
Creators: name: Kiałka, Agata
name: Ruta, Rafał
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scirtidae
Atopida
Atopida suffusa

description: Atopida suffusa Broun, 1910
(Figs 2E–F, 5Q–R, 8J, 10H–I, 15B, 17I)
Atopida suffusa Broun, 1910: 31
Atopida suffusa: Pic 1914: 16 (catalogue); Macfarlane et al. 2011: 420 (catalogue); Kiałka & Ruta 2017: 26 (catalogue).
Type material. Holotype (NHM): “3071” [in Broun’s hand], “ New Zealand. [red underline] \ Broun Coll. \ Brit. Mus. \ 1922-482.”, “Greymouth \ J. H. Larris ” [in Broun’s hand], “ Atopida \ suffusa” [in Broun’s hand].
Other material examined. 2 exx. (NZAC): “L. Wahapo \ 15-I-57, \ E.S. Gourlay”; 7 females (NHM): “WD: 6 km SW. \ Mahitahi \ swamp forest \ 5.ii.1984 ”, “ NEW ZEALAND \ B.M.1984-80 \ P.M. Hammond ”; 2 females (NMPC): “ NEW ZEALAND: Westland \ Three Mile Lagoon 3.7km SW of \ Okaroto, 43°14.5’S 170°7.5’E, \ 0 m, 8.xii.2012, Fikáček, Hájek \ & Leschen lgt. NZ44”, “sifting of ordinary leaf litter in low \ swampy coastal bushes on the \ dune behind the beach”; 2 females (NMPC): “ NEW ZEALAND: Westland \ Westland NP; Lake Matheson \ 5 km NWW of Fox Glacier vill. \ 43°26.3’S 169°58.0’E, 120m. \ 9.xii.2012 \ Fikáček, Hájek & Leschen lgt. NZ45”, “sifting of leaf litter and mosses in \ the podocarp-broadleaf forest \ and its margins with tree ferns \ along E coast of the lake”; 1 ex. (NMPC): “ NEW ZEALAND: Westland \ Ship Creek (Tauperikaka) \ 16 km NE Haast, 10-12.xii.2012 \ 43°45.7’S 169°8.7’E, 0-10m \ M. Fikáček, J. Hájek & R. Leschen lgt.”; 1 female (NMPC): “ NEW ZEALAND: Westland \ Kellys Creek @ Otira Hwy., 3 km \ N of Otira, 350m, 3-14.xii.2012 \ 42°48.2’S 171°34.4’E \ Fikáček, Hájek & Leschen NZ50”, “sifting of mosses + accumulated \ leaf litter in the mossy forest on \ the flood plain of small mountain \ river + slightly above in \ Nothofagus-podocarp forest ”; 4 males (NMPC): “ NEW ZEALAND: Westland \ Lake Mapourika 9.5 km SE of \ Okaroto, 43°17.8’S 170°13.5’E, \ 160m, 10.xii.2012, Fikáček, \ Hájek & Leschen lgt. NZ47”, “on flowering Cordyline and \ Weinmannia ”; 1 female (CMNC): “ N.Zealand, WN \ Akatarawa saddle \ Dec.17, 1983 \ L.Masner, s.s.”; 1 male (AMNZ): “ Waiho Gorge \ S. Westland \ 16.I.25 [on the underside of the cardboard with the beetle]”, “ C. E. Clarke \ Collection”.
Diagnosis. Body moderately sized to large (TL 4.0– 5.1 mm), rather stout, covered with long, erect setae. Externally somewhat resembling A. villosa, but easy to distinguish on the basis of genitalia. Penis with wide, bulbous trigonium and bursal sclerite with long lateral rods and small, v-shaped central sclerite are known only in A. impressa. Easy to distinguish from A. impressa on the basis of external morphology, especially erect setation of dorsum.
Redescription. Male. Body moderately sized to large (TL 4.00– 5.10 mm) elongated, moderate size, moderately convex. Body brown, elytra a bit lighter than head and pronotum, antennae and legs lighter. Punctation on head and pronotum granulate, strong and dense, punctures touching each other, granules a bit flattened in central portion of pronotal disc, separated by ca. 0.5 diameter; punctation on elytra simple, punctures separated by 0.5–1.0× diameter of a puncture, interspaces shining. Body covered with long, erect, yellowish setae. Supraantennal ridges well-marked, elevated. Pronotum widest slightly before middle of its length, sides curved, anterolateral angles not produced, posterolateral angles obtuse. Elytra without carinae, humeri well-marked. Ventrite 5 rounded. Penis elongated (L 0.62 mm, W 0.24 mm), trigonium strongly widened in apical portion, oval, shorter than parameroids; parameroids elongated, apices obliquely truncate, axe-shaped, apical part covered with few punctures; pala subrectangular, narrow, ca. as long as parameroids. Tegmen (L 0.63 mm, W 0.42 mm) with narrow, subtriangular parameres, narrowing at apices, covered with numerous punctures and setation near inner margin of apical portion.
Female. Body moderately big (TL 4.0– 4.6 mm), brachypterous. Supraantennal ridges marked, not elevated. Pronotum more transverse than in males, punctation of elytra coarser. Ventrite 5 rounded, with deeply, semicircularly emarginated apex. Central portion of ventrite 4 with two oblique setal patches. Bursal sclerite consisting of two lateral rods (L 0.30 mm) widened in posterior portion and armed with small denticles on outer parts of anterior portion, additional small, v-shaped sclerite present between rods.
Measurements and ratios. Males (n = 6) TL 4.00– 5.10 mm (4.56 mm), PL 0.70–0.85 mm (0.78 mm), PW 1.35–1.65 mm (1.47 mm), EL 3.60–4.25 mm (3.83 mm), EW 2.05–2.35 mm (2.18 mm), TL/EW 1.95–2.23 (2.09), PW/PL 1.75–2.06 (1.87), EL/EW 1.67–1.84 (1.76), EL/PL 4.50–5.36 (4.90), EW/PW 1.42–1.56 (1.49). Females (n = 4) TL 4.00– 4.56 mm (4.26 mm), PL 0.75–0.85 mm (0.81 mm), PW 1.40–1.60 mm (1.53 mm), EL 3.35–3.65 mm (3.50 mm), EW 2.10–2.25 mm (2.16 mm), TL/EW 1.86–2.05 (1.97), PW/PL 1.87–1.88 (1.88), EL/EW 1.56–1.67 (1.62), EL/PL 4.24–4.47 (4.31), EW/PW 1.34–1.54 (1.42).
Distribution. Described from Greymouth in Buller area, but most of the specimens examined were collected in various localities in Westland area of South Island (Fig. 18I).
Remarks. The species is an unusual example of a marsh beetle with genital structures (both aedeagus and bursal sclerite) hardly distinguishable from another species from which it can be easily separated on the basis of external morphology. Usually species of marsh beetles that are externally almost identical differ considerably at least in male genital features.
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 428-429, DOI: 10.11646/zootaxa.5174.4.6, http://zenodo.org/record/6986469