Contacyphon tristis (Gemminger, 1869)

(Figs 2E, 3E, 9)

Cyphon obscurum Solier, 1849: 458 (terra typica: Illapel, Santa Rosa)

Helodes tristis Gemminger, 1869: 125 (new substitute name)

Helodes tristis Gemminger: Gemminger & von Harold 1869: 1620

Cyphon tristis: Pic 1914: 36 (checklist; Chile)

Cyphon triste: Blackwelder 1944: 267 (checklist; Chile); Moroni 1985: 174 (Chile, prov. de Coquimbo, Illapel; prov. de Aconcagua, Los Andes)

Contacyphon tristis: Zwick et al. 2013: 347

Type material of Contacyphon obscurum . Lectotype (present designation), “ Cyphon \ obscurum Sol \ Chili ” [handwritten with brown ink, probably by Solier]; “9 \ 45” [handwritten on a green, round label]. The specimen is covered with mould, but otherwise well preserved.

Description. Male, body oval, TL = 3.8 mm. Head brown, pronotum orange, scutellar shield and adscutel- lar portions of elytra orange, posterior and lateral portions of elytra brownish, antennae and mouthparts orange, legs brown. Punctures on elytra separated by ca. 0.7–1.0 diameter of a puncture. Anterolateral angles of pronotum slightly projecting anteriorly, posterolateral angles obtuse. Penis (L 0.77 mm, W 0.43 mm) symmetrical, with wide basal portion, short and wide trigonium, and two parameroids, each parameroid with paired hooks in basal 1/3, apical 2/3 very narrow, rod-like; tegmen (L 0.58 mm, W 0.55 mm) with very narrow parameres, each paramere with lateral spine which is almost half as long as paramere, apical portions of parameres slightly widened, apices pointed; tergite VIII (L 0.55 mm, W 0.49 mm) with subrectangular apical plate, densely covered with setae, apical margin with numerous dense, short setae forming a comb-like structure and much sparser longer setae, apodemes as long as apical plate; tergite IX (L 0.49 mm, W 0.40 mm) narrower than tergite VIII, apical portion membranous, setation absent, apodemes slightly diverging basally; sternite VIII absent; sternite IX (L 0.29 mm, W 0.30 mm) consisting of two elongate oval hemisternites, with short and sparse setae at apices.

Remarks. Two localities are listed in the original description (Solier 1849), therefore Solier examined more than a single specimen of this species. A lectotype is designated in order to preserve the stability of nomenclature by selecting one specimen as the sole, name-bearing type of the taxon.