Heptodonta wiesneri, Görn, Sebastian, 2020

Görn, Sebastian, 2020, Revision of the Oriental tiger beetle genus Heptodonta Hope, 1838 (Coleoptera: Cicindelidae), Zootaxa 4875 (1), pp. 1-62 : 24-27

Heptodonta wiesneri sp. nov.

Figs. 62–67

Type locality. Philippines: Negros .

Type material. Holotype: ♂ in JWCW, labelled: “ PHILIPPINES, VII.85, / Negros oriental, / leg. Romeo Lu- mawig” [yellow margin, printed] // “melanopyga / Schaum / det. J. Wiesner 1985” [handwritten] . Paratypes (2): 1 ♂ in JWCW, 1 ♂ in SMNS: “ PHILIPPINES, 8.VI.85, / Negros oriental, / leg. Romeo Lumawig ” [yellow margin, printed] // “ Heptodonta / melanopyga / Schaum / det. J. Wiesner 1985” [handwritten]. All type specimens labelled: “ HOLOTYPE (or PARATYPE respectively) / Heptodonta / wiesneri sp. nov. / ded. Sebastian Görn 2020” [red, printed] .

Diagnosis. Resembling bluish-coloured specimens of H. melanopyga , but aedeagus compact and triangular shaped, with distinctly Y-shaped sclerite. Further, distinguished by the rather smooth, globular pronotum with laterobasal curvature, and the labrum slightly triangular in its median part. In contrast to H. mindoroensis , femora without extended dark apical areas. Due to the lack of mediolateral and anteroapical elytral impressions, it is easily distinguishable from H. abasileia sp. nov., H. nigrosericea , and H. halensis sp. nov.

Etymology. This new species is dedicated to Jürgen Wiesner for his comprehensive support with material and knowledge.

Description. Body size: Length 11.6–12.0 mm (without labrum), width 3.7–3.9 mm ( Figs. 62–63 ). Female unknown.

Dorsal surface of head iridescent bluish-green with yellow-orange lustre on frons and occiput, temples blue. Frons irregularly rugose. Vertex median with parallel longitudinal striations converging in transition to the orbital plates. Orbital plates with shallow longitudinal striae, two setae on each side. Occiput with transverse grooves, anteromedian irregularly rugose. Genae glabrous and shallowly grooved, violet-blue posterior and yellowish-green anterior. Clypeus glabrous, iridescent bluish-green, with two dark-blue frontal impressions. Labrum pale-testaceous, with four setae, wider (1.43–1.50 mm) than long (0.61–0.65 mm) ( Fig. 64 ), slightly antero-triangular, five apical teeth, and one lateral tooth on each side, acute median tooth with a dark tip, third apical teeth reduced. Mandibles pale-testaceous on the lateral and rufous-testaceous on the inner side, teeth dark reddish-brown to black. Labial and maxillary palpi pale-testaceous with dark-brown apices of terminal palpomeres. Antennae slender, extending back over the middle of the elytra, dark brown, scape and antennomere 3 dark-testaceous on underside, pedicel testaceous at base, scape with a single apical seta, antennomeres 3–4 with few scattered setae, antennomeres 5–11 finely and evenly pubescent.

Thorax entirely glabrous. Pronotum with irregularly rugose orange spot on disc, bordered yellow, followed by iridescent bluish-green, and finally a blue lateral margin, slightly longer (2.45–2.55 mm) than wide (2.31–2.41 mm), rather shallow transverse grooves, running concentrically on disc, strong median line, pronounced anterior and posterior sulci, anterior lobe wider than posterior, lateral margins of the median lobe slightly converging to the base, but sloping stronger posteriorly, giving the median lobe a specific globular shape. Episterna violet-blue, metepisternum with blue-green lustre. Prosternum, posterior mesosternum, metasternum, and epimera iridescent yellowish-green to bluish-green.

Elytra elongate, length 7.1–7.5 mm, slightly dilated laterally, maximal width posterior, iridescent colouration bronze along the sutures from base to posterior declivity, yellow transition to bluish-green sublateral area, passing to blue margin and violet juxtaepipleural area, discal and juxtahumeral impression moderate, as well as impression on posterior declivity, apical impression deep, basodiscal convexity and posterior gibbosity moderate; deep blue punctures irregularly distributed, large in front, decreasing in size to apex, particularly anteriorly and along the sutures, slightly fused to transverse lines.

Coxae dark-testaceous with iridescent green lustre, pro- and mesocoxae anteriorly, metacoxae laterally densely covered with long white setae. Trochanters and femora testaceous. Femora distally sparsely black-coloured dorsoapically and on apical margin, black colouration slightly extended at metafemoral apex. Tibiae for the most part metallic-black, but testaceous in proximal half of protibiae, proximal third of mesotibiae and proximal apex of metatibiae. Tarsi metallic-black with a slight violet lustre. Claws rufous-testaceous.

Abdominal sternites glabrous (apart from few long setae at posterior margins, and some minute setae on posterior margin of sternite 5), dark-brown with violet-blue reflections, anal sternite almost completely brown ( Fig. 65 ).

Aedeagus robust, length 2.26–2.32 mm, ventral side straight, also anterodorsally and medioposterodorsally straight and ascending, forming a generally triangular shape; straight, converging apex with short round tip, short and stout base steeply sloping. Inner sac in left lateral aspect with specifically y-shaped median sclerite ( Figs. 66–67 ).

Variability. Pronotal and aedeagal shape showing some variation without losing the species-specific characters.

Distribution. Central PHILIPPINES (Negros).

Remarks. Together with the three type specimens, Romeo Lumawig collected a specimen of H. melanopyga , showing the same specific colour pattern of H. wiesneri sp. nov., which is unique within H. melanopyga .

Figures

FIGURES 62–67. Heptodonta wiesneri sp. nov., Philippines, Negros oriental (JWCW): 62, 64–67—♂, holotype: 62—habitus, 64—head, 65—lateral body, 66—aedeagus in left lateral aspect, 67—aedeagus in right lateral aspect; 63—habitus, ♂, paratype. Scales: 62–65 = 1 mm, 66–67 = 0.5 mm.