Alaolacon fujiokai, Arimoto, Koichi & Arimoto, Hisayuki, 2017

Arimoto, Koichi & Arimoto, Hisayuki, 2017, The genus Alaolacon Candeze, a senior synonym of the genus Eumoeus Candeze (Coleoptera, Elateridae, Agrypninae), ZooKeys 656, pp. 85-110 : 94-95

Alaolacon fujiokai sp. n. Figures 20-21, 22-29, 30-35, 36-37

Etymology.

The name of this species honors Mr. Masahiro Fujioka for providing the material.

Type material.

Holotype. Male, Tawau, East Malaysia (Sabah), Malaysia, V 2014 [ELKU].

Diagnosis.

Body black, elytra blue and with metallic luster, legs black; setae black on dorsal side and white on ventral side; frontal depression deep; eye small; prothorax almost as long as wide, widest posteriorly; pronotum with anterior angles bisinuate and rounded, medina longitudinal depression deep, extending from before pronotal anterior margin to base, punctate; prosternal process inclined strongly behind procoxae; anterior angles of hypomeron acute; scutellum concave laterally, widest near posterior 1/3; hind wings with cross vein between veins MP4 and CuA2 located anterad to contact point between veins MP3 and MP4, without wedge cell; median lobe of male aedeagus stout.

Measurements.

BL: 18.9, BW: 6.11, MIE: 2.08, MAE: 3.05, OI: 68, PL: 5.95, PML: 5.23; PW: 5.91, PI: 101, EL: 12.1, EW: 6.11, EI: 197.

Description of male.

Body (Figs 20, 21) shiny, elytra with metallic luster. Color. Black except for elytra black-blue; mouth-parts brown-black, but mandible black, galea and lacinia orange; apical edge of tarsal segment V and tarsal claws red-brown; pregenital segments and aedeagus black-brown. Hairs. Dorsal surface covered with black flatted setae; ventral surface with white flatted setae; legs with intermixed black and white setae; mouth-parts and pronotal anterior margin near eyes with yellow-brown setae; filiform setae of antennomeres III-XII brown and long.

Head (Fig. 22). Frontal depression deep. Eyes small. Antennomere I long; antennomere II short, dish-shaped; antennomeres III-XI flabellation strong; antennomere XII elongate (Fig. 23). Apical maxillary palpomere 1.8 × as long as wide (Fig. 24) (Mandibles chipped in apical parts.)

Prothorax almost as long as wide, widest posteriorly; sides rounded anteriorly, liner posteriorly. Pronotum with anterior angles bisinuate and rounded; median longitudinal depression deep, extending from before pronotal anterior margin to base, punctate. Prosternal spine inclined strongly (at 18 degrees) behind procoxae (Fig. 25). Hypomeron with anterior angles acute (Fig. 26). Scutellum (Fig. 28) concave laterally, 1.2 × as long as wide, widest near posterior 1/3. Hind wings with cross vein between veins MP4 and CuA2 apparent, not completely connected with CuA2, located anterad to contact point between veins MP3 and MP4 (Fig. 29: arrow); wedge cell absent. Elytra with sides almost parallel on basal half; intervals with small and coarse punctures.

Abdomen. Ventrite V 0.67 × times as long as wide. Tergite VIII (Fig. 30) 0.72 × as long as wide, colorless basal area. Sternite VIII (Fig. 31) with darker W-shaped band; median notch shallow and truncate transversally. Tergite IX (Fig. 32) with median notch shallow and rounded. Sternite IX (Fig. 33) narrowed abruptly on posterior half to apex. Aedeagus (Figs 34, 35). Median lobe stout; basal struts 0.35 × total length of median lobe. Parameres with dense and long setae. Basal piece 0.29 × total length of aedeagus.

Female.

Unknown.

Distribution.

Malaysia: Sabah: Tawau.

Remarks.

This species is distinct by black body, blue elytra with metallic luster, black setae on dorsal side, white setae on ventral side and strong antennomeres III-XI flabellation. It is similar to Alaolacon candezei Fleutiaux, 1928 in having a black body, blue elytra with metallic luster, pronotum anterior angles bisinuate and rounded, and scutellum concave laterally, except for drastic sexual differences of antennae, but is distinguished by the following contrasting characters ( Alaolacon candezei in parentheses): legs black (Fig. 21) (legs red, Fig. 2); setae black on dorsal side and white on ventral side (Fig. 20) (all setae white, Fig. 1); frontal depression deep (Fig. 22) (frontal depression moderate, Fig. 4); pronotal median longitudinal depression extending from before pronotal anterior margin to base (Fig. 22) (pronotal median longitudinal depression not reaching anterior margin or base, Fig. 4); anterior angles of hypomeron acute (Fig. 26) (anterior angles of hypomeron rounded, Fig. 8); prosternal spin inclined strongly behind procoxae (Fig. 25) (prosternal spine inclined weakly behind procoxae, Fig. 7); scutellum widest near posterior 1/3 (Fig. 28) (scutellum widest near posterior 2/5, Fig. 10); hind wings with cross vein between veins MP4 and CuA2 located anterad to contact point between veins MP3 and MP4 (Fig. 29: arrow) (hind wings with cross vein between veins MP4 and CuA2 located at contact point between veins MP3 and MP4, Fig. 11: arrow).

Alaolacon fujiokai and Alaolacon candezei are similar species from the same island, but we recognized they are different species by the setal color and the hind wing venation. We believe that setal complementary color difference probably is not caused by sexual dimorphism because such dimorphism has not previously been observed in species of the Agrypninae. We also believe that differences in hind wing venation are unlikely to be caused by sexual dimorphism because such dimorphism has not previously been observed in species with flying females.