Echinoaesalus hidakai

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 : 554

Echinoaesalus hidakai ( Araya, Kon, & Johki, 1993)

( Figs. 1 , 8, 10, 31–32, 35–36 , 57–58 , 77, 90, 103)

Material. MALAYSIA: 1 ♂ (L12), 1 ♀ (L10), Kelantan, 60 km NE of Tanah Rata, Tanah Kerajaan, 1000 m, 12– 30.IV.2007, P. Cechovsky.

Remarks. The following previously unnoticed characters of this species should be noted, in comparison with the species we have examined. Third antennomere similar to that of E. borneoensis and E. sabahensis in shape, more elongate than in E. timidus , E. gedeensis Huang & Wu, 2011, and E. cechovskyi new species.. Male ligula similar to that of E. arayai and E. borneoensis , but markedly larger than in E. chungi , E. timidus , E. sabahensis , E. gedeensis , and E. cechovskyi . Labial palpus in both sexes with all palpomeres nearly as long as in E. arayai and E. borneoensis , but markedly longer than in E. chungi , E. timidus , E. sabahensis , E. gedeensis , and E. cechovskyi .

Sexual dimorphism is found in width of head, size of labrum, galea of maxilla, ligula of labium, distance between palp insertions on prementum, size and shape of mentum, length of intercoxal process of prosternum, detailed shape of outer apex of metatibia, and presence or absence of a central projection on anterior margin of last abdominal ventrite; but is not found in shape of tooth, shape and length of third antennomere, detailed apex of protibia, and posterior margin of last visible abdominal ventrite and venation of hindwing.

Male genitalia ( Fig. 90 ). The male genitalia examined by us fit the original description ( Araya et al. 1993) in all details. The median lobe of parameres is entirely pigmented, without colorless splits laterally.

Female genitalia ( Fig. 103 ). Accessory gland rooted just on terminal end of bursa copulatrix. Bursa copulatrix nearly as large as accessory gland when fully inflated, easily separable from bursal duct in width. Bursal duct rather long and wide. Spermatheca and its duct originated near the beginning of bursa copulatrix. Spermathecal duct rather long, nearly as long as bursal duct.

Distribution. Restricted to Malay Peninsula. The previously described subspecies, E. hidakai borneoensis from Borneo deserves full specific rank as discussed below.

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.

FIGURES 103 – 106. Female genitalia under same scale (scale bar 1 mm). 103, Echinoaesalus hidakai, L 10; 104 – 106, E. borneoensis; 104, L 16; 105, L 07; 106, L 27. Abbreviations: st, stylus; lv, last abdominal ventrite; mo, median oviduct; bd, bursal duct; bc, bursa copulatrix; sd, spermathecal duct; s, spermatheca; sg, spermathecal gland; ag, accessory gland.