Thisiomorphus convergens, Pollock, Darren A., 2016

Pollock, Darren A., 2016, Revision of Thisiomorphus Pic (Coleoptera: Mycteridae: Eurypinae) with descriptions of eleven new species from Central and South America and a key to genera of Neotropical Eurypinae, Zootaxa 4093 (3), pp. 301-322 : 313-314

Thisiomorphus convergens , new species

( Figs 5 , 34)

Holotype, female, labeled: “ BRAZIL: Para Belem [-1.449758, -48.477837] 16 February 1975 E.S. Ross collector Cal Acad Sci Collection // EURYPUS SP. Det. J. F. Lawrence // CASC // [large red label] HOLOTYPE ♀ Thisiomorphus convergens Pollock ”, in CASC.

Derivation of specific epithet. From the word “convergent”, pertaining to the lateral pronotal margins, which are distinctly convergent anteriorly.

Diagnosis. The single specimen exhibits the following distinctive features: dorsum of body with distinct bluish metallic lustre; pronotum distinctly wider than long, with lateral margins almost straight, and distinctly convergent anteriorly.

Description. Measurements (mm, N=1): HL = 0.80; PL = 0.80; EL = 3.24; GHW = 1.04; GPW = 1.32; GEW = 2.04; TL = 4.84. Ratios: EL/GEW = 1.59; GPW/PL = 1.65; TL/GEW = 2.37; GPW/GHW = 1.27. With characters of Thisiomorphus , and the following:

Body moderately broadly ovate (TL/GEW 2.37), lateral elytral margins distinctly arcuate.

Color. Antennae uniformly rufopiceous; maxillary palpi rufous with darker distal palpomere; head and pronotum dark piceous, with distinct blue metallic lustre; scutellum and elytra slightly lighter than forebody, with similar metallic lustre; femora and tibiae piceous, tarsi lighter, rufous; venter piceous, abdominal ventrites slightly lighter than thorax (specimen could be slightly teneral).

Antennae relatively short; antennomeres 3–7 subfiliform; antennomeres 8–10 short, indistinctly widened distally.

Pronotum distinctly wider than long (GPW/PL 1.65), distinctly wider than head (GPW/GHW 1.27); lateral margins only very slightly arcuate, convergent anteriorly, maximum width at hind angles; hind angles not protruding; dorsal surface evenly convex, without depressions.

Male genitalia unknown.

Distribution. The single known specimen is from BRAZIL (Pará).

Figures

FIGURES 1 – 6. Dorsal habitus of Thisiomorphus species. 1. T. andrewsi, n. sp., male holotype; 2. T. bolivianus, n. sp., female holotype; 3. T. brasiliensis, n. sp., male holotype; 4. T. caeruleus, n. sp., female; 5. T. convergens, n. sp., female holotype; 6. T. davidsoni, n. sp., female holotype.