Prothyma (Genoprothyma) lucidicollis Mindanao

Prothyma (Genoprothyma) lucidicollis (Chaudoir, 1869) (Fig. 11)

Odontochila lucidicollis Chaudoir 1869: 2, 3.

Type locality. “ Iles Philippines (Mindanao)”.

Odontochila lucidicollis: Fleutiaux 1892: 126.

Prothyma lucidicollis: Horn 1923: 359, 360; Horn 1926: 99.

Prothyma (Genoprothyma) lucidicollis: Rivalier 1964: 154, f. 14c, 155, f. 15c, 156, 157, f. 16c; Wiesner 1980: 124; Wiesner 1992: 58; Cabras, Cabigas and Wiesner 2016: 192; Wiesner 2020: 138.

Type material. Lectotype (here designated) male: “I. Philippines / Lorquin // TYPE [printed, red letters] // LECTOTYPE / Odontochila lucidicollis / Chaudoir, 1869 / design. Wiesner & / Anichtchenko 2022 [printed, red]” (MNHN).

Diagnosis. Prothyma (Genoprothyma) lucidicollis is distinguished from Prothyma (Genoprothyma) hopkinsi by shape of elytral maculation and aedeagus.

Note. The COVID-19 global pandemic made it impossible for us to visit the Muséum National d’ Histoire Naturelle, Paris and the collections of this museum currently do not lend type material for study. Azadeh Taghavian (MNHN) was kind enough to take photographs of the type of P. lucidicollis and make them available to us. These photos, as well as the descriptions by Chaudoir (1869: 2, 3) and Rivalier (1964: 154–157) formed the basis of the following re-description.

Description. Size: TL (without labrum) 11 mm (n=1).

Head: Slightly smaller than elytra, with developed rugae on vertex and orbital plates, central rugae between eyes zigzag. Labrum (Fig. 11b) moderately elongated, dark brown, laterally testaceous, with two marginal teeth and one median lobe. Mandibles brown, laterally testaceous. Palpi testaceous with brown last segment, penultimate segment of labial palps not thickened. Scape (antennomere 1) testaceous, articles 2–3 testaceous, with coppery reflections.

Thorax: Pronotum narrow and elongate, slightly longer than wide, laterally slightly convex, median furrow shallow, transverse wrinkles irregular and fine but well visible, shining coppery, blue on sides and in anterior and posterior furrows.

Elytra: Parallel, coppery bronze, strongly punctate, mostly becoming confluent and forming transverse grooves; apex barely dentate, slightly retracted; with three white spots, one small humeral, one triangular mediolateral, and one triangular apical.

Ventral aspect: Venter blue. Femora testaceous, apical half of meso- and metafemora brownish metallic. Tibia and tarsi brownish metallic.

Aedeagus: (Fig. 11c) Description is based on drawing from Rivalier (1964). In general appearance the aedeagus is similar to P. rotundatocuprascens, i.e., in the basal third slender, then voluminously expanded and rapidly tapering again towards the apex, with tip short and blunt (total length ca. 3.1 mm). Endophallus not observed due to an existing genital preparation from Rivalier (number 1448) is in poor condition and would need to be restored for examination.

Distribution. MINDANAO (Chaudoir 1869: 3).

Remarks. Horn apparently did not see the type; in his identification key (1923: 361, 362) P. lucidicollis is classified as a small species (up to 9.5 mm) with metallic labrum. The specimens of his collection determined as P. lucidicollis turned out to be either Prothyma (Symplecthyma) nitida Rivalier or Prothyma (Symplecthyma) aeneoparva Horn.