Vietnalia catcatica, Novák, 2021

Novák, Vladimír, 2021, New genera of Alleculinae (Coleoptera: Tenebrionidae: Alleculinae: Alleculini) from the Oriental Region. Part XI-Vietnalia gen. nov., Zootaxa 4920 (3), pp. 439-444 : 442-443

Vietnalia catcatica sp. nov.

( Figs 1–11 )

Type locality. Vietnam, Lao Cai province, 4 km southwest of Cat Cat , 1920 m, montane rainforest .

Type material. Holotype (♂): wl: VIETNAM, Lao Cai prov., / 4 km SW of Cat Cat , / 1920m,montane rainforest, // 13.III.1998, No. 8. / at light, L.Peregovits & T. Vásárhelyi ( HNHM).

Paratypes: (1 ♂, 9 ♀♀): same data as holotype, ( HNHM, VNPC); (2 ♀♀): wl: VIETNAM, Lao Cai prov., / 5 km W of Cat , 2050 m, / 22°18.337´N, 103°49.291´E // 15.III.1998, No. 17 / at light, L.Peregovits & T. Vásárhelyi ( HNHM, VNPC) .

The types are provided with a printed red label: “ Vietnalia / catcatica sp. nov. / HOLOTYPUS [or PARATYPUS] / V. Novák det. 2020”.

Description. Habitus as in Fig. 1 , body outline ( Fig. 2 ), oval, slightly convex, from ochre yellow to reddish brown, shiny, dorsal surface almost glabrous with punctation, BL 5.95 mm. Body widest near two thirds elytra length; BL/EW 2.39.

Head ( Fig. 4 ) reddish brown, shiny, slightly wider than long, through the eyes approximately as wide as anterior margin of pronotum. Dorsal surface almost glabrous, with punctation, punctures slightly larger and denser than those on pronotum.Anterior part slightly paler than posterior part. Mandibles ochre yellow, shiny, glabrous dorsally, with fine microrugosities, apex dark. Epistoma pale reddish brown with pale setation, shallow, almost indistinct punctures, with microgranulation, slightly excised in middle of apex. HW 1.14 mm; HW/PW 0.70; HL (visible part) 1.00 mm. Eyes moderately large, transverse, distinctly excised, space between eyes wide, distinctly wider than diameter of one eye, distinctly wider than length of each antennomere, approximately as wide as width of ultimate maxillary palpomere; OI equal to 47.66.

Antenna ( Fig. 5 ) slightly exceeding half body length, AL 3.56 mm; AL/BL 0.60, antennomeres with short, pale setation, fine microgranulation and small punctures. Antennomeres 1–5 ochre yellow, 6–11 brown, antennomeres 1–3 slightly shiny, 4–11 rather matte, antennomeres 3–10 slightly widened apically. Antennomere 2 shortest, ultimate antennomere longest, antennomeres 4–11 slightly longer than antennomere 3.

RLA(1–11): 0.92: 0.49: 1.00: 1.04: 1.10: 1.04: 1.14: 1.23: 1.19: 1.22: 1.29.

RL/WA(1–11): 1.76: 1.33: 2.70: 2.53: 2.67: 2.92: 3.07: 2.31: 2.35: 2.34: 2.54.

Maxillary palpus ( Fig. 6 ) ochre yellow, slightly shiny, with pale setation and microgranulation. Palpomeres 2 and 3 distinctly narrowest at base and widest at apex, ultimate palpomere transverse, strongly widened apically, widely triangular, pale brown, slightly darker than penultimate. UPW/L 3.19.

Pronotum ( Fig. 4 ) pale reddish brown, wide, transverse, shiny, distinctly narrower than elytra at humeral level, widest near middle of lateral margins; PW1/2 1.92 mm. Dorsal surface glabrous, with punctation, punctures small. Intervals between punctures distinctly wider than diameter of punctures. PL 0.98 mm; PW 1.62 mm; PI equal to 60.49. Border lines distinct, narrow. Lateral margins with angle in middle, anterior margin finely excised, base slightly bisinuate. Posterior and anterior angles obtuse.

Scutellum. Ochre yellow, roundly triangular, with sides darker and a few small punctures, shiny.

Elytra. Ochre yellow, glabrous, shiny, oval, widest near middle, microgranulation very fine or indistinct. EL 3.97 mm; EW 2.49 mm; EL/EW 1.59. Elytral striae with distinct rows of punctures slightly larger than those in pronotum. Elytral interspaces with double punctation (punctures smaller than those in elytral striae on the one hand and punctures as large as those in elytral striae on the other hand).

Elytral epipleura well-developed, ochre yellow as elytron itself, widest near base, finely narrowing to ventrite 1, with a few very small punctures in basal half, then relatively wide and parallel in apical part.

Legs. Narrow, pale brown or pale reddish brown, with fine microgranulation, pale setation and small punctures. Protarsomeres 3, 4, mesotarsomeres 4 and metatarsomeres 3 widened and lobed. RLT: 1.00: 0.81: 0.73: 0.64: 1.18 (protarsus), 1.00: 0.52: 0.48: 0.62: 1.22 (mesotarsus), 1.00: 0.46: 0.35: 0.75 (metatarsus).

Both anterior tarsal claws with 6 visible teeth.

Ventral side of body with very short, pale setation and dense punctation, punctures small. Abdomen pale brown with 6 visible ventrites, shiny with sparse, pale setation, fine microgranulation and sparse punctation, punctures small. Ventrite 5 with large, triangulary shaped impression in middle, ultimate ventrite with rounded impression and roundly excised in middle of apex (as in Fig. 8 ).

Aedeagus ochre yellow, unusually shaped as in Fig. 9 , apical piece asymmetrical ( Figs 10, 11 ), slightly darker, pale brown.

Female ( Figs 3, 7 ) has pronotum wider and shorter than in male (PI approximately 57), antenna not reaching half body length (AL/BL 0.42), ultimate maxillary palpomere slightly narrower and shorter than in male, abdomen with only 5 visible ventrites, ventrite 4 without impression, ventrite 5 with shallow impression in middle, apex straight.

Measurements of female body. BL 6.22 mm; HL 0.99 mm; HW 1.12 mm; OI 47.06; PL 0.87 mm; PW 1.61 mm; PI 54.40; EL 4.36 mm; EW 2.61 mm; AL 2.60 mm; AL/BL 0.42; HW/PW 0.70; BL/EW 2.38; EL/EW 1.67; UPW/L 2.15.

RLA(1–11): 0.75: 0.54: 1.00: 0.83: 0.86: 0.96: 1.04: 1.12: 1.07: 1.12: 1.16.

RL/WA(1–11): 1.84: 1.37: 3.04: 2.03: 2.24: 2.81: 2.72: 2.66: 2.25: 2.36: 2.59.

RLT: 1.00: 0.69: 0.74: 0.79: 1.62 (protarsus), 1.00: 0.50: 0.54: 0.54: 1.22 (mesotarsus), 1.00: 0.32: 0.29: 0.73 (metatarsus).

Variability. The type specimens somewhat vary in size; each character is given as its mean value, with full range in parentheses. Males (n= 2). BL 5.79 mm (5.62–5.95 mm); HL 0.98 mm (0.95–1.00 mm); HW 1.11 mm (1.08–1.14 mm); OI 46.11 (44.55–47.66); PL 0.99 mm (0.98–1.00 mm); PW 1.55 mm (1.48–1.62 mm); PI 64.03 (60.49–67.57); EL 3.82 mm (3.67–3.97 mm); EW 2.36 mm (2.22–2.49 mm). Females (n= 11). BL 6.68 mm (6.20– 7.26 mm); HL 1.03 mm (0.98–1.13 mm); HW 1.17 mm (1.11–1.28 mm); OI 50.52 (47.06–53.90); PL 0.97 mm (0.86–1.12 mm); PW 1.71 mm (1.61–1.85 mm); PI 57.01 (47.41–52.07); EL 4.67 mm (4.30–5.12 mm); EW 2.83 mm (2.61–3.05 mm).

Differential diagnosis. See the differential diagnosis of the genus.

Etymology. Toponymic, named after the type locality Cat Cat village in Lao Cai province ( Vietnam).

Distribution. Vietnam, province Lao Cai.

Figures

FIGURES 1–11: Vietnalia catcatica sp. nov. (Figs 1, 2, 4–6, 8–11: male holotype): 1—Habitus; 2—body outline; 3—habitus of female; 4—head and pronotum; 5—antenna; 6—maxillary palpus; 7—female maxillary palpus; 8—abdomen; 9—aedeagus; 10—apical piece of aedeagus, dorsal view; 11—apical piece of aedeagus, lateral view.