Chrysodema (Gelaeus) walkeri rejzeki, 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 : 713-714

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.6467800
persistent identifier	https://treatment.plazi.org/id/04548794-697C-FF85-0F36-FAFAFBE0FE02
treatment provided by	Marcus
scientific name	Chrysodema (Gelaeus) walkeri rejzeki
status	subsp. nov.

Treatment

Chrysodema (Gelaeus) walkeri rejzeki subsp. nov.

( Figs 30–32 View Figs 30–35.30–32 , 64 View Figs 56–71 )

Type locality. Indonesia, East Nusa Tenggara Province, Alor Island .

Type material. HOLOTYPE: ♀, ‘Alor [w, p] // Galaeus / walkeri / (Waterh., 1892) / Dét. T. LANDER 1990 [w, h/p]’ ( MHNG). PARATYPES (1 ♂ 2 ♀♀): ♀, ‘Alor / Staud. [w, h] // SYN- / TYPE [b, p] // cupriventris / Kerr. / Type [w, h] // Kerremans. / 1903—59. [w, p] // Chrysodema / erronea / HOŁYŃSKI / HOLOTYPE [r, h] // 1978 Chrysodema / erronea Hol. / det. R. Hołyński [w, h; unpublished manuscript name]’ ( BMNH); ♂, ‘Alor [w, p] // COLLECTION / de BONNEUIL [w, p] // MUSÉUM PARIS / 1935 / Coll. A. THÉRY [w, p]’ ( MHNH); ♀, ‘I. Alor / H. F. Holz. [w, p]’ ( MHNH). All specimens provided with an additional red printed label: ‘ HOLOTYPE [or PARATYPE respectively] [sex] / Chrysodema (Gelaeus) / walkeri / rejzeki subsp. nov. / David Frank & / Lukáš Sekerka des. 2016 [year handwritten]’.

Description of holotype. Well preserved ♀ specimen, missing right antenna and last tarsomeres on left fore-leg and both hind-legs. Length 30.25 mm, width 10.75 mm, length/width ratio: 2.81. Body strongly shiny. Body colouration as in the nominotypical subspecies but elytra dark blue including apex without purple reflections and with greenish apical half of suture, lateral sides, lateral impressions, and partly also punctures ( Figs 30, 32 View Figs 30–35.30–32 ). Whole tarsi brown, only claws metallic.

Pronotum moderately coarsely and moderately densely punctate. Medial line well marked, impunctate. Medial impressions distinctly impressed on both sides, coarsely and densely punctate, punctures smaller than those on disc. Principal impressions oval and shallow, not sharply bordered, well separated from basal impressions, weakly separated from disc, with small dense punctures. Lateral impressions oval, shallow, punctate. Basal impressions large and oval.

Elytra with conspicuous anterior and posterior lateral impressions, moderately punctate. Both impressions shallow but distinct, anterior round, larger, posterior oval and smaller ( Fig. 32 View Figs 30–35.30–32 ). 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 quite densely and more or less regularly arranged, not forming isolated groups; spaces approximately 2× as broad as puncture diameter, flat not reticulate ( Fig. 32 View Figs 30–35.30–32 ). Intervals basally flat, not elevated, broad, approximately 4× as wide as rows of punctures, impunctate; apically and laterally narrowed, somewhat elevated and punctate.

Ventral side ( Fig. 31 View Figs 30–35.30–32 ) including legs as in nominotypical subspecies. Only lateral sides of abdominal ventrites III–V densely punctate in basal half and very sparsely punctate in apical; punctures moderately large, subequal in size.

Variation. Body ♂ (n = 1) length: 26.00 mm, width: 9.5 mm, length/width ratio: 2.74, ♀♀ (n = 3) length: 30.25–31.00 mm, width: 10.75–11.25 mm, length/width ratio: 2.73–2.81. Head, pronotum, underside of body including legs from bright green to golden-green with more or less expanded copper reflections. Elytra from turquoise-green to blue or violet-blue and with only anterior lateral impression. In one ♀ specimen elytra mostly blue, lateral margin green only in basal third of elytra.

Aedeagus ( Fig. 64 View Figs 56–71 ) length 6.53 mm, width 1.43 mm, length/width ratio: 4.57. Apex of parameres horizonatlly truncate. Penis elongate-oval, distinctly rounded on sides.

Differential diagnosis. Among the subspecies of C. (G.) walkeri this one is easily distinguished by elytra with distinct large lateral impressions and green lateral sides and suture, while the other subspecies do not have differently coloured margins of elytra or suture and the lateral impressions are rarely present and if so they are very small and shallow (basically present only as a group of several punctures). For additional characters see Table 1 View Table 1 .

Etymology. This species is dedicated to Roman Rejzek (Prague, Czech Republic), excellent collector of Buprestidae .

Distribution. Indonesia, East Nusa Tenggara Prov.: Alor Is.

Remarks. The paratype of C. (G.) walkeri rejzeki subsp. nov. deposited in BMNH is labelled as syntype of C. (G.) cupriventris . The latter species was described from ‘Macassar’ and KERREMANS (1898) must have had at least two specimens as he gave length span ‘Long., 21- 28; larg., 7-9 mill.’. However, this ‘syntype’ has locality Alor and measures 30.75 × 11.25 mm and is very different from the other syntype of C. (G.) cupriventris deposited in BMNH. Therefore we do not consider it as a part of the type series of the latter species. We assume that Kerremans acquired this specimen after the description of C. (G.) cupriventris and erroneously labelled it as its type. Most likely it represents a voucher specimen for the record from Alor mentioned by him ( KERREMANS 1903). See additional remarks under C. (G.) cupriventris .