Eumorphus mirabilis, Yoshitomi, Hiroyuki & Sogoh, Koichi, 2019

Yoshitomi, Hiroyuki & Sogoh, Koichi, 2019, Eumorphusmarginatus group in Sulawesi, Indonesia (Coleoptera, Endomychidae), ZooKeys 820, pp. 139-149 : 144-147

Eumorphus mirabilis sp. n. Figs 2A, B; 3D, E; 4D, E; 5D, E; 6 I–L

Material examined.

Holotype, male (EUMJ), "(C. SULAWESI) Puncak Dingin, alt. ca. 1700 m, 14.XI.1985, S. Nagai leg." Paratypes, female (EUMJ), same locality and collector, but 19.X.1985; 1 male and 1 female (NSMT), "Puncak Palopo, C. Celebes, IV.1989".

Diagnosis.

This species can be easily separated from all other Eumorphus species in having cordiform elytra possessing one pair of spots and the pronotum laterally serrated.

Description.

Male.

Coloration of body black, with blueish luster; elytral spots reddish orange.

Antennae long, reaching ca. basal 1/4 of elytra; antennal club wide.

Pronotum (Fig. 4D) glossy, widely depressed in lateral parts; lateral margins irregularly serrate; lateral sulci relatively long, reaching ca. basal 1/3 of PLM; anterior angles nearly right-angled; posterior angles sharply pointed, projecting postero-ventrally; PLM/PLS 0.82-0.87 (0.84); PWP/PWA 1.84-1.99 (1.91); PWP/PLM 1.86-1.93 (1.90); PWP/PLS 1.53-1.68 (1.60). Elytra (Fig. 2A) cordiform, widest at anterior 1/4; lateral flattened margins wide, undulate vertically; elytral spots one pair, present in anterior 1/4, relatively large and oval, each distant from suture by half of its diameter; elytra along suture (Fig. 3D) distinctly elevated in basal 1/3; EL/EW 0.86-1.07 (0.97); EL/PLM 4.02-4.41 (4.21); EW/PWP 2.21-2.42 (2.31); TL/EW 1.07-1.31 (1.19). Fore tibiae (Fig. 5D) slender, slightly curved laterally in apical parts; apical carinae weakly projecting dorsally, covered with yellowish brown pubescence in dorsal and inner parts; fore tibial tooth short, situated in apical 1/4. Metatibial apices shortly prolonged in form of bifid projection; with outer angles shorter than inner ones.

Aedeagus (Fig. 6 I–L) 5.4 mm long, relatively slender; median lobe gently curved ventrally; apical branch short, trapezoidal in apical part, with small projection in dorsal part of apical branch; subapical branch slender and long, evenly curved antero-laterally; tegmen movable, with relatively long tegminal strut; endophallus consisting of bifid long right membranous lobe and long left membranous lobe.

Female. Similar to male, but sexual dimorphism distinct in the following characteristics: posterior angles of pronotum (Fig. 4E) ca. 50°; fore tibiae (Fig. 5E) slender, slightly curved laterally in apical parts, covered with yellowish brown pubescence in apical half; metatibial apices simple; PLM/PLS 0.77-0.78 (0.78); PWP/PWA 1.60-1.68 (1.64); PWP/PLM 1.78-1.91 (1.85); PWP/PLS 1.37-1.50 (1.44); EL/EW 0.99 -1.07 (1.03); EL/PLM 4.45-4.46 (4.45); EW/PWP 2.33-2.35 (2.34); TL/EW 1.21-1.32 (1.26).

Measurements. Male (n = 2). TL 16.55-18.65 (17.60) mm; PW 6.37-6.43 (6.40) mm; PW 3.20-3.50 (3.35) mm; PL 3.30-3.45 (3.38) mm; PL 3.80-4.20 (4.00) mm; EL 13.25-15.20 (14.23) mm; EW 14.20-15.40 (14.80) mm. Female (n = 2). TL 16.23-16.38 (16.31) mm; PW 5.35-5.70 (5.53) mm; PW 3.35-3.40 (3.38) mm; PL 2.98-3.00 (2.99) mm; PL 3.80-3.90 (3.85) mm; EL 13.25-13.38 (13.32) mm; EW 12.45-13.40 (12.93) mm.

Distribution.

Indonesia (Sulawesi: Central).