Cordielytrum silvae, Whorrall & Philips, 2021

Whorrall, Kyle & Philips, Keith, 2021, Six new species of spider beetles (Coleoptera: Ptinidae) in the genus Cordielytrum Philips, Zootaxa 5040 (3), pp. 414-427 : 417-418

Cordielytrum silvae , sp. n.

( Fig. 3 )

Holotype: Peru: Ica Region, Lomas de San Fernando. 11–12.VI.2019, S15.13°, W75.31° dung pitfall traps, 1425 m K.A.Whorrall & T. K.Philips . Holotype has been deposited in MUSM . Paratypes (16): Same data as holotype (11); PE: ICA, Prov. de Nazca Lomas de San Fernando 15°08’51.7” S 75°15’27.8” W 489m, 03.iv.2010, D. Silva y M. Vilchez (1); Prov. de Nazca Lomas de San Fernando 15°07’29.0” S 75°20’19.8” W 430m, 03.iv.2010, D. Silva y M. Vilchez (4) . Paratypes have been deposited in MUSM, KAWC, TKPC , and JBHC.

Diagnosis. This species is distinguished from its congeners by its relatively large size, the smooth appearance of its setation, its small bead-like scales, and its pale, brassy coloration. It can be distinguished from C. peruvianum by the larger depressions in elytral scales, more transverse pronotum, and less pronounced elytral carinae.

Description. Body small, compact, subovate, convex; brass colored with a slight sheen. Length (anterior of pronotum to apex of elytra) 2.93–3.25 mm.

Head completely covered with depressed, light tan, ovoid scales; pronounced superantennal carinae; antennae slender, antennomeres densely covered in scales, setae increasingly fine toward apex, antennomeres 1–4 and 11 slightly longer than wide, others subequal; clypeus distinct; labrum with short erect orange setae apically; frons with short ligulate scales pointing toward middle.

Pronotum covered with densely matted setae, short, erect setae protruding from deep cavities within matted setation; medial cavity deep, broad, when viewed from above, extending nearly ½ total length, border well-defined laterally but indistinct medially, extending as a shallow groove anteriorly; two posterolateral cavities very shallow with indistinct borders.

Elytra: Setation pale brassy tan, darker tan pattern medially, background color dark brown; densely covered in small, broad, ovate scales; basal ¼ of anterolateral margin with row of long bristly setae; four low longitudinal carinae extending length of each elytron, including one at suture; 4–5 rows of deep depressions between carinae.

Ventral Surface: Prosternum and mesoventrite with matted scales somewhat similar to pronotum; remainder of ventral mesothorax, metathorax, legs, and abdominal ventrites with scales similar to elytra.

Etymology: The name “silvae” is for Diana Silva, who collected the first specimens of this species.

Figures

FIGURE 3. Cordielytrum silvae. A Dorsal habitus, B ventral sclerites, C lateral view, D frontal close-up. Scale bars: 1.0 mm (A, C), 0.5 mm (B, D).