Cordielytrum globuloides, 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 : 423-425

Cordielytrum globuloides , sp. n.

( Fig. 8 )

Holotype: PERU, AR, Yarabamba , Linga Alta 16°34’23” / 71°33’45” 2759 m 29.III.2017 C. Bravo . Holotype has been deposited in MUSM . Paratypes (6): PERU, AR, Yarabamba , San Jose 2622 m 16°33’32” / 71°37’51” 18.III.2017 C. Bravo (1); PERU, AR, Yarabamba, San Juan 2438 m 16°34’00” / 71°38’27” 20.III.2017 C. Bravo (2) ; PERU, AR, Yarabamba , Linga Alta, 2760 m 16°33’32” / 71°37’51” 28.III.2017 C. Bravo (1); PERU, AR, Tiabaya, Quebradita 2500 m 16°28’53” / 71°36’02” 22.III.2017 C. Bravo (2) . Paratypes have been deposited in MUSM, KAWC , and TKPC.

Diagnosis: This species is distinguished from congeners by its yellowish tan and speckled dark brown elytral coloration, the absence of carinae on the elytra, and the distinct rectangular or conical shaped elytral scales.

Description. Body small, ovate, convex; mottled yellowish tan. Length (anterior of pronotum to apex of elytra) 2.19–2.88 mm.

Head completely covered with depressed, light tan, ovoid scales; slight superantennal carinae; eyes surrounded by very narrow bare patch lacking scales dorsally, ventrally with scales slightly protruding; antennae stout, antennomeres densely covered in scales, setae increasingly fine toward apex, antennomeres 1–4 and 11 longer than wide, others subequal; labrum with scattered short erect orange setae apically; frons with elongate ligulate scales pointing mainly obliquely toward middle, especially prominent toward apex.

Pronotum covered with densely matted setae, relatively few short, erect setae; medial cavity very deep, extending over half total length of pronotum, border well-defined except at middle anterior and posterior; two posterolateral cavities on each side deep and distinct, lateralmost cavities completely anterior to adjacent cavities.

Elytra: Setation yellowish tan, speckled with dark brown in random somewhat clumped pattern, background color reddish brown; surface mostly covered in conical or flattened rectangular scales, some scales instead acutely pointed; basal 1/3 of anterolateral margin with row of long bristly setae; elytral carinae absent; ~4 rows of short erect setae on each elytron.

Ventral Surface: Ventral part of pro-, meso-, and, metathorax, legs, and abdominal ventrites with appressed oval scales.

Etymology: The name “globuloides” is for the similar color pattern of this species to Trigonogenius globulus Solier , for which it was initially mistaken among museum material.

Figures

FIGURE 8. Cordielytrum globuloides. 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).