Parasyntrophus radiatifrons (Heller) Riedel, 2024

Riedel, Alexander, 2024, Taxonomic review of weevils of the tribe Celeuthetini, mainly from Sundaland, Sulawesi and the Lesser Sunda Islands (Coleoptera, Curculionidae, Entiminae), Zootaxa 5464 (1), pp. 1-75 : 49-50

Parasyntrophus radiatifrons (Heller) , comb. n.

Idiopsis radiatifrons Heller, 1914: 307 . Type locality: C-Bali, Gn. Bratan.

Idiopsodes radiatifrons (Heller)

Description. Lectotype ( Fig. 27a ). Length. Pronotum plus elytron 4.95 mm. Integument covered with appressed grey scales. Head with subangulate, transverse sulcus separating rostral base; vertex with marked radial furrows, covered by scales. Rostrum as long as wide (1.00 X), sides subparallel; apical declivity with sunk-in scales, with interspersed erect scales. Antennal funicle with article 2 longer (1.2 X) than article 1. Pronotum as long as wide (1.05 X); coarsely punctate, squamose; with median subglabrous ridge. Elytra 1.24 X as long as wide; dorsally flattened; interval 6 forming lateral ridge, bearing dense fringe of long erect scales; at middle ridge most distinct, scales black; along humeri and in apical third scales light-greyish; disc without erect scales; apical declivity with sparse, relatively short, erect scales. Genitalia. Penis ( Fig. 27b ) with sides of body subparallel, converging to rounded apex. Apodeme 2.88 X as long as body of penis. Endophallus folded; with long curved brownish portion containing cuticular microstructures. Transfer apparatus flagelliform, ca. 3 X as long as body of penis. Intraspecific variation. Length. Pronotum plus elytron 4.55–6.13 mm. Female elytra dorsally more convex; interval 6 simple, behind middle forming weak knob; intervals 3–7 with rows of long erect scales; erect scales slightly denser on knob of interval 6, without dense fringe.

Material examined. Type specimens. Male, lectotype by present designation: INDONESIA, C-Bali, Gn. Bratan, 1913, E. Stresemann; labels ( Fig. 27c ); condition: fair; genitalia in glycerol in microtube; DNA extraction ARC4024 (GenBank # OR557440) ( SMTD). Paralectotypes: 5 exx, same data as lectotype. Other material examined: 1 ex, ARC3541 (GenBank # LN866360) INDONESIA, C-Bali: Bedugul , Tamblingan, S08° 15.015´E115° 06.202´, 1200–1300 m, 06-XI-2007 .

Notes. In the original description, no holotype is designated and the number of specimens at hand is not mentioned. Four syntypes were examined. A lectotype is designated to ensure stability of nomenclature in case additional syntypes belonging to other species are found. The cox1 sequence of the lectotype and a specimen from Lake Tamblingan have a p-distance of 4.69%; no morphological differences could be detected .

Figures

FIGURE 27. Parasyntrophus radiatifrons (Heller). Idiopsodes radiatifrons (Heller), lectotype: (a) Habitus (b) Penis (c) Labels.