Heptodonta horii, Görn, Sebastian, 2020

Görn, Sebastian, 2020, Revision of the Oriental tiger beetle genus Heptodonta Hope, 1838 (Coleoptera: Cicindelidae), Zootaxa 4875 (1), pp. 1-62 : 35-36

Heptodonta horii sp. nov.

Figs. 4 , 99–105

Type locality. Myanmar: Bago Region, Mon State .

Type material. Holotype: ♂ in JWCW, labelled: “ V. 1997 BURMA / PEGU / CHANTHAKWIN / KLÍCHA M. Lgt ” [with yellow frame, printed] // “SANDY WALLS OF / RAVINERS - IN / SHADE OF BUSHES - / NOT IN OPEN SUN” [printed] // “ HEPTODONTA / arrowi / W. Horn, 1900 / Det. F. Cassola, 2004” [printed] . Paratypes (7): 1♂ 2 ♀♀ in JWCW, 1 ♂ in SMNS with same locality labels as holotype plus: “ HEPTODONTA / ARROWI / (W. Horn 1900) / K. WERNER Det.” [printed] . 1 ♂ 1 ♀ in ZSM: “ V. 1997 BURMA / PEGU / CHANTHAK- WIN / KLÍCHA M. Lgt ” [printed] // “ Heptodonta / arrowi W. HORN 1900 / WERNER det. ’97” [printed] // “ZSM – Samml. / K. Werner 2009” [printed] . 1 ♀ in SGCH: “vertical clay bank of a small trench, / Mokkamu, Mon State , / MYANMAR / June 2, 2018 / Michio HORI & Thanda Moe leg.” [printed]. All type specimens labelled: “HOLO-

TYPE (or PARATYPE respectively) / Heptodonta / horii sp. nov. / ded. Sebastian Görn 2020” [red, printed].

Diagnosis. Small slender species with typical labral shape. Resembling H. arrowi , but distinguishable by acute aedeagal apex, wavy diagonal spines row within aedeagal inner sac (best seen in right lateral aspect), slender elytral and pronotal shape, finer pronotal striation ( Fig. 4 ), and considerably reduced third labral teeth. There might be some confusion with exceptionally small specimens of H. pulchella , H. eugenia , or H. vermifera , but in contrast to those species the labrum of H. horii sp. nov. has a specific semicircular shape in males and semicircular-trapezoidal shape in females, and the elytra have slightly reduced microsculpture and dense, shallowly fused punctures. Unlike H. pulchella and H. vermifera , the mesepisternum is violet. It is distinct from H. eugenia by dense anteapical punctures on elytra, and from H. posticalis , which has a similar elytral surface, by different labral shape and total body length under 11.5 mm.

Etymology. This new species is dedicated to Michio Hori for his essential support with material, images, and habitat information.

Description. Body size: Length 8.9–10.6 mm (without labrum), width 2.5–3.1 mm ( Figs. 99–100 ).

Dorsal surface of head metallic reddish and green. Frons transversely grooved. Vertex anterior and in transition to orbital plates with rather straight longitudinal grooves, posterior with crumpled wrinkles. Orbital plates with fine striae that are wrinkled anteriorly, and with two setae on each side. Occiput with wrinkled transverse grooves, anteromedian irregularly rugose. Genae glabrous and considerably grooved, from anterior to posterior yellow, green, blue, and violet. Clypeus glabrous, copper and green with two anterior blue spots. Labrum testaceous, with four setae, five apical teeth, and one lateral tooth on each side, male labrum semicircular (0.70–0.73 mm long, 1.23–1.30 mm wide, Fig. 101 ) with reduced apical teeth; female labrum trapezoidal (1.00– 1.05 mm long, 1.35–1.48 mm wide, Fig. 102 ) with three acute median teeth and reduced third apical teeth. Mandibles testaceous in females, pale testaceous in males, with rufous-testaceous teeth. Labial and maxillary palpi testaceous, terminal palpomeres in females entirely dark-brown, in males apically or entirely dark-brown; female pre-terminal maxillary palpomeres dark-testaceous. Antennae slender, extending back over the first half of the elytra in males, dark-brown, but first six antennomeres frequently dark-testaceous, scape with a single apical seta (one female with two setae on a scape), antennomeres 3–4 with few scattered setae, antennomeres 5–11 finely and evenly pubescent; in males terminal antennomere slightly to conspicuously dilated.

Thorax entirely glabrous. Pronotum metallic green with expanded reddish-bronze areas on anterior lobe, posterior lobe, and disc, slightly elongated (1.75–2.00 mm long, 1.55–1.88 mm wide), moderate median line blue, moderate transverse grooves wrinkled on disc, pronounced anterior and posterior sulci, posterior lobe almost as wide as anterior, lateral margins of median lobe rather convex. Proepisternum and mesepisternum violet, metepisternum, sterna and epimera bluish-green with some greenish lustre.

Elytra elongate, length 5.3–6.5 mm, slightly dilated laterally in females and almost parallel in males, maximal width at or a little anterior to the middle, metallic reddish-bronze with some greenish lateral colouration, lateral margin violet, reduced (but still visible) microsculpture, juxtahumeral and apical impression slightly pronounced, discal impression and basodiscal convexity moderate, posterior gibbosity lacking, dense punctures slightly deeper anterior and forming shallowly fused transverse grooves.

Legs elongated, procoxae and mesocoxae testaceous with gently dark-testaceous and iridescent green colouration, metacoxae metallic blue to green and with testaceous posterior apex, pro- and mesocoxae anteriorly, metacoxae laterally densely covered with long white setae, mesocoxae posteriorly with few white setae. Trochanters pale-testaceous. Femora testaceous with dark-brown distal apices, dark colouration dorsally slightly extended. Tarsi darktestaceous with dark-brown distal apex or dark-brown with lightened proximal apex, slender. Claws testaceous.

Abdominal sternites glabrous (apart from few long setae at posterior margins), dark-brown with bluish reflections on first five sternites ( Fig. 103 ).

Aedeagus arched, length 2.20–2.33 mm, slight medioventral convexity, pointed apex elongated ventrally, dorsal continuously curved, aedeagal base rather steeply sloping. Inner sac in right lateral aspect with broad wavy darktestaceous apical-anteromedian spine row that is diagonally directed, in left lateral aspect inner sac median with diagonal anterodorsal flabellate sclerite ( Figs. 104–105 ).

Distribution. Central MYANMAR (Bago Region, Mon State).

Biology. In shaded habitats on vertical surfaces such as sandy walls and clay banks, along shaded paths (see labels).

Figures

FIGURES 1–7. 1–2—anterior elytra: 1—Heptodonta melanopyga (Schaum, 1862), ♀, Philippines, Luzon, Banaue (PSCH); 2—H. mindoroensis Cassola, 2000, ♂, Philippines, Mindoro, Mt. Halcon (JWCW). 3–4—pronotum: 3—H. arrowi W. Horn, 1900, ♂, Myanmar, Magway Region, Pyon Village (SGCH); 4—Heptodonta horii sp. nov., ♂, holotype, Myanmar, Bago Re- gion, Chanthakwin (JWCW); 5–7—head: 5—Heptodonta tempesta sp. nov., ♂, holotype, India, Meghalaya, Balpakram NP (JWCW); 6—Heptodonta pulchella (Hope, 1831), ♂, Nepal, Bagmati, Sollenta-Dhading (JWCW); 7—Heptodonta schuelei sp. nov., ♂, holotype, India, Meghalaya, Cherrapunjee (JWCW). Scales: 1 mm.

FIGURES 99–105. Heptodonta horii sp. nov., Myanmar, Bago Region, Chanthakwin (JWCW): 99, 101, 103–105—♂, holo- type: 99—habitus, 101—head, 103—lateral body, 104—aedeagus in left lateral aspect, 105—aedeagus in right lateral aspect; 100, 102—♀, paratype: 100—habitus, 102—head. Scales: 99–103 = 1 mm, 104–105 = 0.5 mm.