Chrysodema (Chrysodema) aurostriata Saunders, 1866

Frank, David & Sekerka, Lukáš, 2020, Studies on the genus Chrysodema (Coleoptera: Buprestidae: Chrysochroinae) part I., Zootaxa 4720 (1), pp. 1-62 : 18-19

Chrysodema (Chrysodema) aurostriata Saunders, 1866

( Figs 13–15 , 24 , 90–91 )

Chrysodema aurostriata Saunders (1866) : 302 (original description, incl. colour Fig. 8 , Pl. XXI); Saunders (1871): 14 (catalogue); Kerremans (1892): 38 (catalogue); Kerremans (1903): 75 (catalogue); Théry (1927): 253 (noted, supposedly as Chalcophora ); Baudon (1962): 67 (faunistics); Akiyama & Ohmomo (2000): Pl. 44, Fig. 465 (misidentification= C. (C.) vrabeci sp. nov.).

Chalcophora aurostriata: Gemminger & Harold (1869) : 1357 (catalogue).

Chrysodema (Chrysodema) aurostriata: Kerremans (1909) : 516 (key), 543 (redescription); Obenberger (1926): 130 (catalogue); Baudon (1966): 31 (noted, faunistics); Lander (2003): 14 (key), 67 (redescription); Kubáň (2006): 345 (catalogue); Bel- lamy (2008): 528 (catalogue).

Chrysodema (Cyalithoides) aurostriata: Kubáň (2016) : 460 (catalogue).

Type locality. ‘ Laas’ [ Laos] .

Type material examined. LECTOTYPE (present designation): ♀, ‘Laas / Mouhot [w, h/p] // Saunders. / 74–18. [w, p] // [upper side]: Chrysodema / aurostriata (Type) Saund.; [underside]: label written / by / C. O. Waterhouse [w, h] // Type. [w, p] // Type [r, p, circle]’ ( BMNH). Specimen was provided with an additional red printed label: ‘ LECTOTYPE ♀ / Chrysodema / aurostriata / SAUNDERS, 1866 / David Frank & / Lukáš Sekerka des. VIII. 2018 [date handwritten]’.

Redescription of lectotype. Well preserved ♀ specimen, only left mid and right hind tarsi partly missing. Length 29.25 mm, width 10.00 mm, length/width ratio: 2.93.

Body generally metallic green-copper, shiny; convex parts on dorsum green and impressed ones copper. Ventral side bright green, centrally strongly copper and laterally changing to golden. Legs including tarsi metallic green, ventral pads black. Labrum, maxillae and labium including palpi pale brown ( Fig. 24 ). Scape and pedicel metallic, remaining antennomeres brownish-black.

Pronotum moderately densely macropunctate with broad and sparsely micropunctate interspaces. Macropunctation laterally gradually coarser and denser. Macropunctures in central part round, small and isolated, with small fovea; laterally distinctly deeper impressed and often coalescent forming oval foveae. Medial line well visible, very sparsely micropunctate, not elevated. Medial impressions shallow, but distinct. Principal impressions moderately deep and weakly delimited from disc. Lateral impressions absent. Lateral margin rounded, distinct in basal 2/3.

Elytra regularly convex with slightly elevated (more obviously on apical half) flat costae along suture and on intervals 2, 4, 6 and 8. Intervals 2 and 4 interrupted by oblique and densely punctate impression in basal 1/4 length. Intervals 4 and 6 interrupted by oblique and densely punctate impression in apical 1/3 length. Interval 6 not connected to interval 4 and separated by narrow impression. All intervals sparsely micropunctate (at magnification 50×) and in greater part also macropunctate; only apical part of interval 1 and basal part of interval 6 forming low impunctate costa. Areas between intervals slightly impressed, moderately densely macropunctate. Punctation completely irregular, not forming rows but partly forming groups of 2–6 punctures (usually 2–3), which appears coarser and deeper impressed. Groups of punctures more or less gradually deeper impressed from postscutellar area towards lateral sides and apex. Interspaces circa 1–6 × as wide as puncture diameter, very sparsely micropunctate, micropunctures hardly visible at magnification 50 ×. Each macropuncture bearing short adherent white seta, but impressions do not appear pilose. Basal oblique impression shallow, postero-lateral one moderately deep, both with denser punctation than rest of elytra. Epipleura in basal 1/4 broad, largely smooth and strongly shiny, then abruptly constricted with acutely angled inward tooth in constriction and then gradually narrowing apically; entire narrow part quite densely punctate, each puncture bearing long erect white seta.

Fore and mid femora in central part strongly shiny, sparsely punctate; hind femora distinctly more densely punctate. Each puncture bearing seta, setation particularly conspicuous on lower side of hind femora.

Ventral side of body ( Fig. 14 ) overall densely and moderately coarsely punctate, only central part sparsely punctate, with large shiny impunctate areas. Entire lateral sides of abdominal ventrites I–II densely and almost uniformly punctate. Lateral sides of remaining ventrites densely punctate in basal half and sparsely in apical half ( Fig. 15 ).

Ventrite VII moderately coarsely punctate, apex broad and rounded. Tergite VIII coarsely punctate with large punctures and moderately narrowing apically; apex evidently more than half of width of base (basal part damaged, precise measurement not possible) and weakly emarginated, not obviously bilobed ( Fig. 91 ). Ventrite VIII broadly subpentagonal, parallel-sided, apex narrowing and rounded ( Fig. 90 ).

Distribution. Laos.

Differential diagnosis. For comparative characters see Table 2 on page 25.

Remarks. The type of C. (C.) aurostriata was unknown to subsequent authors and they followed key proposed by Kerremans (1909) based on the original description only. Théry (1927) synonymized C. (C.) tonkinea with C. (C.) aurostriata based on the original description and two specimens compared to the type of the latter in his collection; for more details see remarks under C. (C.) tonkinea . He also noted that in his opinion the species is wrongly assigned to Chrysodema and should be transferred to Chalcophora but subsequent authors did not accept this transfer. Based on the material we studied and which was originally identified as C. (C.) aurostriata , this species was interpreted as having strong copper tint and elytra with very low costae and four impressions. Baudon (1962, 1966) published additional specimens from Laos (Vientianne and ‘Ban Houeï Say [= Ban Houayxay; capital of the Bokèo Province]’). We did not examine the original material but we studied one specimen collected in Laos in 1963 by him and it is certainly not conspecific with the type of C. (C.) aurostriata . It belongs to an undescribed taxon as well as the other specimens previously identified as C. (C.) aurostriata are described here as C. (C.) vrabeci sp. nov.

Lander (2003) listed in distribution of C. (C.) aurostriata Cambodia, Laos, Thailand, and Vietnam. However, these data include also other taxa and true C. (C.) aurostriata is known from a single specimen only labelled generally as Laos. Other countries in its distributional list must be removed and transferred either to C. (C.) tonkinea or C. (C.) vrabeci sp. nov.

Figures

FIGURES 13–18. Chrysodema, general aspect: 13–15—C. (C.) aurostriata Saunders, 1866 (lectotype, ♀ 29.25 mm). 16–18— C. (C.) vrabeci sp. nov. (holotype, ♂ 23.75 mm). 13, 16—dorsal view; 14, 17—ventral view; 15, 18—lateral view.

FIGURES 19–24. Chrysodema, general aspect: 19–21—C. (C.) tonkinea Kerremans, 1909 (lectotype, ♂ 21.00 mm). 22—C. (C.) aurostriata ‘coomani Théry’ (BMNH, ♀ 28.25 mm)=C. (C.) tonkinea. 23—C. (C.) aurostriata ‘delacouri Théry’ (BMNH, ♀ 28.25 mm)=C. (C.) tonkinea. 24—C. (C.) aurostriata Saunders, 1866 (lectotype, ♀). 19, 22–23—dorsal view; 20—ventral view; 21—lateral view; 24—head.

FIGURES 73–95. Chrysodema, genitalia and terminal abdominal segments. 73—Chrysodema (Chrysodema) sonnerati Laporte de Castelnau & Gory, 1835 (Sri Lanka, MHNG); 74—C. (C.) lewisii lewisii Saunders, 1873 (holotype); 75—C. (C.) lewisii nakatai subsp. nov. (holotype); 76—C. (C.) tonkinea Kerremans, 1909 (lectotype); 77—C. (C.) vrabeci sp. nov. (holotype); 78—C. (C.) aeneoviolacea Deyrolle, 1864 (Kai Is., MHNG); 79—C. (C.) dany sp. nov. (holotype); 80—C. (C.) sibuyanica Fisher, 1924 (Sibuyan Is., NMPC); 81—C. (C.) wallacei Deyrolle, 1864 (Ambon Is, MNHN); 82—C. (C.) dohrnii Saunders, 1874 (Mindanao Is., DFPC); 83—C. (C.) fuscitarsis Kerremans, 1895 (Palawan Is., MNHN); 84—C. (C.) gottwaldi sp. nov. (holotype); 85—C. (Pseudochrysodema) coelestina Obenberger, 1922 (lectotype); 86—C. (P.) instabilis Deyrolle, 1864 (Halmahera Is., DFPC); 87—C. (C.) dohrnii (ibid., DFPC); 88—C. (C.) fuscitarsis (ibid., MNHN); 89—C. (C.) gottwaldi sp. nov. (holotype); 90, 91—C. (C.) aurostriata (lectotype); 92, 93—C. (C.) tonkinea (Hoa Binh, DFPC); 94, 95—C. (C.) vrabeci sp. nov. (Ban Huay Kon, MOOC). 73–79, 85–86—tegmen, parameres and penis; 80–84—aedeagus; 87–89—male ventrite VIII; 90, 92, 94—female ventrite VIII; 91, 93, 95—female tergite VIII. The scale bar does not apply to Figs 87–95.

FIGURES 7–12. Chrysodema, general aspect: 7—C. (C.) oschimana Nonfried, 1895 (syntype, ♀ 23.50 mm)=C. (C.) lewisii lewisii Saunders, 1873. 8—C. (C.) lewisii lewisii Saunders, 1873 (Akajima Is. (DFPC), ♀ 25.25 mm). 9—C. (C.) lewisii lewisii Saunders, 1873 (Hachijo Is. (DFPC), ♀ 21.75 mm). 10–12—C. (C.) sonnerati Laporte de Castelnau & Gory, 1835 (neotype, ♀ 28.75 mm) and lectotype of C. (C.) yerburyi Waterhouse, 1905. 7–10—dorsal view; 11—ventral view; 12—lateral view.