Chrysodema (Gelaeus) walkeri kubani, Frank & Sekerka, 2016

Frank, David & Sekerka, Lukáš, 2016, Revision of the subgenusGelaeus of Chrysodema (Coleoptera: Buprestidae: Chrysochroinae), Acta Entomologica Musei Nationalis Pragae 56 (2), pp. 671-719 : 710-711

publication ID	https://doi.org/ 10.5281/zenodo.5310800
publication LSID	lsid:zoobank.org:pub:4CBAE762-D52E-4BE6-99A3-8714B47141DFK
DOI	https://doi.org/10.5281/zenodo.6467796
persistent identifier	https://treatment.plazi.org/id/04548794-6971-FF81-0F19-FC2AFD6CFBA2
treatment provided by	Marcus
scientific name	Chrysodema (Gelaeus) walkeri kubani
status	subsp. nov.

Treatment

Chrysodema (Gelaeus) walkeri kubani subsp. nov.

( Figs 39–41 View Figs 36–41. 36–38 , 67 View Figs 56–71 )

Type locality. Indonesia, Maluku Province, Romang Island .

Type material. HOLOTYPE: ♂ ‘Molukken / Ins. Roma [= Romang Island] [w, p] // CHRYSODEMA ( Gelaeus Waterhouse, 1905 ) / walkeri / Damma ( Waterhouse, 1892) / Vít Kubáň det. XI.1997 [w, h/p]’ ( NMPC). PARATYPES: 5 ♂♂ 20 ♀♀, ‘ Molukken / Ins. Roma [w, p] // Coll. / Jul. Moser [w, p]’ (4 ♂♂ 19 ♀♀ MFNB, 1 ♂ 1 ♀ DFPC). All specimens provided with an additional red printed label: ‘ HOLOTYPE [or PARATYPE respectively] [sex] / Chrysodema (Gelaeus) / walkeri / kubani subsp. nov. / David Frank & / Lukáš Sekerka des. 2016 [year handwritten]’.

Description of holotype. Well preserved♂ specimen with all appendages. Length 27.50 mm, width 9.75 mm, length/width ratio: 2.82. Body weakly shiny.

Head, pronotum and scutellum bluish-green. Elytra dark bluish-black including apex, punctation on humeri somewhat greenish or bluish ( Fig. 39 View Figs 36–41. 36–38 ). Ventral side dark green with copper and golden reflections, abdominal ventrites with purplish reflections ( Fig. 40 View Figs 36–41. 36–38 ). Legs green with strong golden lustre, whole tarsi brown, only claws metallic.

Pronotum in general moderately coarsely and densely punctate. Medial line well marked, impunctate, not elevated. Medial impressions shallow, more impressed internally than externally, coarsely and moderately densely punctate, punctures subequal to those on disc, only basally smaller and denser. Principal impressions elongate and shallow, not sharply bordered, well separated from basal impressions, with small dense punctures. Lateral impression weak, oval, punctate. Basal impressions large and triangular.

Elytra without lateral impressions, moderately strongly punctate. Rows visible from base to apex, weakly impressed and irregularly double in apical half, internal rows more or less regularly arranged, external gradually irregular. Punctures in rows V–VIII in middle third of elytra irregular but not forming isolated groups; spaces ca. 2× as broad as puncture diameter, partly elevated but not reticulate ( Fig. 41 View Figs 36–41. 36–38 ). Intervals basally flat, not elevated, broad, approximately 4× as wide as rows of punctures, impunctate; apically and laterally vanishing, strongly narrowed, slightly elevated and punctate.

Ventral side ( Fig. 40 View Figs 36–41. 36–38 ) including legs as in nominotypical subspecies. Only lateral sides of abdominal ventrites II–V densely punctate in basal half and very sparsely punctate in apical half; punctures moderately large, subequal in size.

Aedeagus ( Fig. 67 View Figs 56–71 ) length 7.60 mm, width 1.53 mm, length/width ratio: 4.97. Apex of parameres truncate. Penis oval, somewhat rounded on sides.

Variation. Body ♂♂ (n = 6) length: (24.00)26.00–28.00 mm, width: (8.75) 9.50–10.25 mm, length/width ratio: 2.67–2.87; ♀♀ (n = 20) length: (26.00)28.00– 34.50 mm, width: 9.75–13.00 mm, length/width ratio: (2.43)2.55–2.79. Head, pronotum and scutellum vary from bright blue-green or turquoise-green to greenish-golden. Impressions on pronotum always more greenish. Elytra always bluish-black but often with more or less purple or violet reflections on apex; punctation varies from black (of the same colour as elytra) to blue or bright green. Underside from almost dark green to mostly golden-green. Smaller specimens with overall coarser sculpture of pronotum, denser punctation and more impressed medial impression. Principal impressions in larger specimens weak, barely separated from disc. Aedeagus (n = 4) length: 7.34–7.75 mm, width 1.38–1.53 mm, length/width ratio: 4.97–5.42.

Differential diagnosis. Chrysodema (G.) walkeri kubani subsp. nov. has the roughest (the most costate and coarsest punctation), the dullest and the darkest (blackish-blue) elytra of all subspecies of C. (G.) walkeri , which have elytra distinctly metallic blue or viridian in background and wider smooth interspaces. Chrysodema (G.) walkeri horaki subsp. nov. has the elytra quite rough but distinctly differs in much smaller and denser punctation. For additional characters see Table 1 View Table 1 .

Etymology. This species is dedicated to Vítězslav Kubáň (Šlapanice, Czech Republic), a well-known specialist in world Buprestidae , particularly Coraebini .

Distribution. Indonesia: Maluku Prov.: Romang Is.