Atopida villosa Broun 1921
Creators: name: Kiałka, Agata
name: Ruta, Rafał
Publisher: name: Zenodo
Year: 2022
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Coleoptera
Scirtidae
Atopida
Atopida villosa

description: Atopida villosa Broun, 1921
(Figs 2K–L, 5W–X, 8N, 9B, 10M–N, 16A, 17F)
Atopida villosa Broun, 1921: 534.
Atopida villosa: Macfarlane et al. 2011: 420 (catalogue); Kiałka & Ruta 2017: 27 (catalogue).
Type material. Holotype (NHM): card-mounted, “4061.” [in Broun’s hand], “ New Zealand. [red underline] \ Broun Coll. \ Brit. Mus. \ 1922-482.”, “Pakuratahi \ 2.1.1915 ” [in Broun’s hand], “ Atopida \ villosa” [in Broun’s hand].
Other material examined. 1 ex. (NZAC): “ Akatarawa \17.Nov.51 \ E.S. Gourlay ”; 1ex. (NZAC): “Silverstream \ WN. 19 Nov 51 \ E.S. Gourlay ”; 3 exx. (NZAC): “ New Zealand WN \ Keith George Res \ Silverstream \ 08- Nov-92”, “Ex John Nunn \ Collection \ Donated 2015”; 1 male (NZAC): “ New Zealand WN \ Keith George Res \ Silverstream \ 18-Nov-96”, “General \ beating”, “Ex John Nunn \ Collection \ Donated 2015”; 1 ex. (NHM): “ NEW ZEALAND \ Days Bay \ Wellington \ 19.XI.1931 \ G.V. Hudson ”, “Pres. by \ Com. Inst. Ent. \ B. M. 1948- 525.”; 2 exx. (NZAC): “New Zealand WN \ Pakuratahi Forks \ Kaitoke \ 19-Dec-92”, “Ex John Nunn \ Collection \ Donated 2015”; 1 female (NZAC): “981”, “ New Zealand WN \ Pakurathi Forks \ 18-Dec-94”, “Ex John Nunn \ Collection \ Donated 2015”; 1 female (NZAC): “ New Zealand WN \ Pakuratahi Forks \ Kaitoke \ 19-Nov-96”, “Ex John Nunn \ Collection \ Donated 2015”; 6 exx. (NZAC): “ New Zealand WN \ Pakuratahi Forks \ Wellington \ 17-Nov-96”, “General \ beating”, “Ex John Nunn \ Collection \ Donated 2015”; 1 male (NZAC): “1116”, “ New Zealand WN \ Karori Reservoir \ Wellington \ 20-Nov-96”, “Amongst submerged \ leaves in \ small stream”, “Ex John Nunn \ Collection \ Donated 2015”; 1 ex. (NHM): “ NEW ZEALAND \ Korokoro \ XI.1943 \ G.V. Hudson ”, “Pres. by \ Com. Inst. Ent. \ B. M. 1948-525.”; 3 males (NZAC): “ NEW ZEALAND \ Korokoro \ 1039. \ 12.xi.1938 \ G.V. Hudson ”, “Pres. by \ Comm Inst Ent \ B.M. 1948-525.”; 1 ex. (NZAC): “ Mt. Holdsworth \ 2000’ \ Tararuas \ 19.xi.68 \ S. Edrige ”, “moss \ 68/203”; 1 male (NHM): “7-ii-31”, “ NEW ZEALAND \ Days Bay \ Wellington \ 1039. \ 17.xi.1931 r. \ G.V. Hudson ”, “Pres. by \ Comm Inst Ent \ B.M. 1948-525.”; 1 male (NZAC): “ New Zealand WN \ Khandallah \ Domain \ 17-Aug-92”, “In Tawa \ litter”, “Ex John Nunn \ Collection \ Donated 2015”; 1 male (NZAC): “1116”, “ New Zealand WN \ Eastbourne \ 15-Nov-95”, “Ex John Nunn \ Collection \ Donated 2015”; 2 males (NZAC): “1039”, “ NEW ZEALAND \ Wainuiomata \ XII.1919. \ G.V. Hudson ”, “Pres. by \ Comm Inst Ent \ B.M. 1948-525.”; 1 male (NHM): “103”, “ NEW ZEALAND \ Gollans Valley \ 11.XI.1939 \ G.V. Hudson ”, “Pres. by \ Comm Inst Ent \ B.M. 1948-525.”; 1 male (NHM): “ NEW ZEALAND \ Gollans Valley \ 1039. \ Wellington \ xii.1933 \ G.V. Hudson ”, “Pres. by \ Comm Inst Ent \ B.M. 1948-525.”; 1 male (NHM): “ NEW ZEALAND \ Karori (?) \ G.V. Hudson ”, “Pres. by \ Comm Inst Ent \ B.M. 1948-525.”.
Diagnosis. Body moderately big to large (TL 4.3–5.4 mm), stout, covered with very long, erect setae. Male genitalia similar to those of A. montana, bursal sclerite consisting of long, paired rods, hooked in posterior portion. Easy to distinguish from other Atopida on the basis of external features: long, erect setation, and females with peculiar concavity of elytral base fitting basal portion of pronotum.
Redescription. Male. Body moderately elongated, moderately big to large (TL 4.6–5.4 mm), moderately convex. Body dark brown, head, pronotum, and scutellar shield slightly darker than elytra. Punctation on head and pronotum granulate, strong and dense, punctures doughnut-shaped, touching each other; punctation on elytra simple, punctures separated by 0.5–1.0× diameter of a puncture. Body covered with long, erect setae. Supraantennal ridges well-marked, elevated. Pronotum widest slightly before middle, sides rounded, anterolateral angles only subtly produced, posterolateral angles obtuse. Elytra without carinae, humeri well-marked. Ventrite 5 with regularly rounded apex. Penis (L 0.76 mm, W 0.29 mm) moderately elongated, trigonium narrow, with rounded apex and parallel sides, slightly shorter than parameroids. Pala triangular, as long as parameroids; parameroids elongated, lateral edges subparallel, apices pointing outwards, covered with numerous punctures, inner edge slightly crenulate. Tegmen (L 0.65 mm, W 0.38 mm) moderately wide, parameres subtriangular, narrowing towards apices, with scarce punctures and very few delicate setae on the inner edge.
Female. Body moderately big (TL 4.3–4.8 mm), stouter than males, brachypterous. Supraantennal ridges wellmarked, elevated. Punctation of elytra coarser, punctures separated by 0.3× diameter of a puncture, basal portion of elytra with concavity fitting base of pronotum. Ventrite 5 triangular, with deep, subtriangular emargination at apex. Ventrites 3 and 4 with paired setal patches forming long transverse stripes close to posterior margins of segments. Bursal sclerite consisting of two long (L 0.40 mm) rods pointed in anterior portion and hooked posteriorly.
Measurements and ratios. Males (n = 7) TL 4.55–5.40 mm (4.91 mm), PL 0.80–0.90 mm (0.85 mm), PW 1.45–1.70 mm (1.57 mm), EL 3.75–4.35 mm (4.01 mm), EW 2.25–2.45 mm (2.35 mm), TL/EW 2.02–2.20 (2.09), PW/PL 1.78–1.94 (1.85), EL/EW 1.64–1.78 (1.70), EL/PL 4.44–5.00 (4.72), EW/PW 1.44–1.59 (1.50). Females (n = 4) TL 4.25–4.80 mm (4.50 mm), PL 0.80–0.95 mm (0.86 mm), PW 1.55–1.75 mm (1.64 mm), EL 3.40–3.85 mm (3.60 mm), EW 2.15–2.35 mm (2.26 mm), TL/EW 1.93–2.04 (1.99), PW/PL 1.84–1.94 (1.90), EL/EW 1.55–1.64 (1.59), EL/PL 4.05–4.29 (4.18), EW/PW 1.34–1.42 (1.38).
Distribution. Known from numerous localities in Wellington area of North Island (Fig. 18K).
Remarks. Broun (1921) noted his specimen was apterous and had peculiar structure of elytral base; the holotype was found in decaying leaves on the ground (Broun 1921).
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 433-434, DOI: 10.11646/zootaxa.5174.4.6, http://zenodo.org/record/6986469