Echinoaesalus sabahensis Zelenka, 1994

Huang, Hao, Bartolozzi, Luca & Chen, Chang-Chin, 2015, Notes on the genus Echinoaesalus Zelenka, 1993 (Coleoptera: Lucanidae), with the description of a new species from the Malay Peninsula, Zootaxa 4039 (4), pp. 553-565 : 562-563

Echinoaesalus sabahensis Zelenka, 1994

( Figs. 4 , 12–13, 49 , 68, 74 , 87, 99)

Material. MALAYSIA: 1 ♂ (L14), BORNEO, Sabah, Crocker range, Gunung Emas, VI.1998, Kodada.

Remarks. The following male characters of E. sabahensis have not been described before. Third antennomere ( Fig. 4 ) more elongate than in E. timidus , E. gedeensis , and E. cechovskyi (described below). Labium, maxilla, and hindwing as in other species of the E. timidus group. The 9th abdominal segment of male (Fig. 87) with a very long basal lobe which is at least three times as long as that of other species of the subgenus Zelenkaesalus.

Male genitalia ( Fig. 99 ). Since E. timidus is known to be very variable in mentum and pronotal plate, it is rather difficult to identify the specimens of E. sabahensis without a dissection. The aedeagus of E. sabahensis has been illustrated as a rough hand drawing in the original description ( Zelenka 1994), which shows the following characters: parameres half as long as the dorsal side of median lobe; dorsal side of median lobe enlarged from base to terminal end in width and broadly rounded at the end. The aedeagus of the specimen examined by us ( Fig. 99 ) fits the original figure ( Zelenka 1994) very well. Beside this, the following characters are also noted: size of aedeagus similar to that of E. gedeensis ( Fig. 102 ) and E. cechovskyi ( Fig. 101 ), but markedly larger than that of E.

timidus ( Figs. 93–98, 100 ); lateral sides of the median lobe broadly colorless and non-sclerotized, causing a ventral plate well defined; ventral plate of median lobe contracted at base and broadly rounded, markedly wider than in other species of the subgenus Zelenkaesalus.

Distribution. Only known from Borneo.

Figures

FIGURES 1 – 7. Antenna. 1, Echinoaesalus hidakai, L 12, western Malaysia; 2, E. borneoensis, L 11, Borneo; 3, E. timidus, L 19, western Malaysia; 4, E. sabahensis, L 14, Borneo; 5, E. gedeensis, holotype, Java; 6, E. cechovskyi, holotype, western Malaysia; 7, E. cechovskyi, paratype, Singapore. Arrow directed to end of third antennomere.

FIGURES 35 – 52. Protibia (left), mesotibia (middle), and metatibia (right), or just protibia. 35, Echinoaesalus hidakai, L 12; 36, E. hidakai, L 10; 37, E. borneoensis, L 11; 38, E. borneoensis, L 07; 39 – 48, E. timidus; 39, L 17; 40, L 13; 41, L 08; 42, L 02; 43, L 23; 44, L 21; 45, L 22; 46, L 18; 47, L 09; 48, L 06; 49, E. sabahensis, L 14; 50, E. cechovskyi, holotype; 51, E. cechovskyi, paratype; 52, E. gedeensis, holotype.

FIGURES 57 – 76. Prosternal process in ventral view. 57, Echinoaesalus hidakai, L 12; 58, E. hidakai, L 10; 59 – 62, E. borneoensis; 59, L 11; 60, L 01; 61, L 07; 62, L 16; 63, E. gedeensis, holotype; 64 – 67, E. timidus; 64, L 08; 65, L 02; 66, L 17; 67, L 21; 68, E. sabahensis, L 14; 69, E. cechovskyi, L 28; 70 – 73, E. timidus; 70, L 09; 71, L 06; 72, L 20; 73, L 13; 74, E. sabahensis, after Krikken 2008; 75, E. cechovskyi, paratype; 76, E. javanus, after Krikken (2008), holotype.

FIGURES 90 – 102. Aedeagus in dorsal, left lateral, ventral, and right lateral views under same scale (scale bar 1 mm). 90, Echinoaesalus hidakai, L 12, western Malaysia; 91, E. borneoensis, L 11, Borneo; 92, E. borneoensis, L 01, Borneo; 93 – 98, E. timidus; 93, L 08; 94, L 02; 95, L 17; 96, L 23; 97, L 21; 98, L 22; 99, E. sabahensis, L 14, Borneo; 100, E. timidus, L 18; 101, E. cechovskyi, holotype, western Malaysia; 102, E. gedeensis, holotype, Java. Arrows directed to ends of parameres.