Chrysodema (Chrysodema) sibuyanica Fisher, 1924

Frank, David & Sekerka, Lukáš, 2020, Studies on the genus Chrysodema (Coleoptera: Buprestidae: Chrysochroinae) part I., Zootaxa 4720 (1), pp. 1-62 : 35-36

Chrysodema (Chrysodema) sibuyanica Fisher, 1924

( Figs 34–36 , 80 )

Chrysodema sibuyanica Fisher (1924) : 45 (original description); Akiyama & Ohmomo (2000): Pl. 45, Figs. 483-1, 483-2, Pl. 46, 483-3 (iconography).

Chrysodema (Chrysodema) sibuyanica: Obenberger (1926) : 133 (catalogue); Lander (2003): 13 (key), 32 (redescription), 78 (colour Fig. 53 ); Bellamy (2008): 539 (catalogue).

Type locality. ‘ Sibuyan Island, Philippines’ [ Philippines, Romblon Province, Sibuyan Island] .

Type material examined. HOLOTYPE: ♀, ‘Island / Sibuyan / Baker [w, p] // 18974 [w, h] // TypoNo. / 25949 / U.S. N.M. [r, p/h]’ ( USNM). Specimen was provided with an additional red printed label: ‘ HOLOTYPE / Chrysodema / sibuyanica / FISHER, 1924 ♀ / David Frank & / Lukáš Sekerka labelled VIII. 2018 [date handwritten]’.

Additional material examined (25 ♂♂, 58 ♀♀). PHILIPPINES: Filipinas , Mantero coll., 1 ♀ ( MNCN, coll. A. Cobos) . Sibuyan Island: Island Sibuyan, Baker [the locality label is identical to the type specimen] (1 ♂, 1 ♀ NMPC; 2 ♀♀ IRSN; 1 ♀ DFPC; 1 ♂, 6 ♀♀ MNHN) ; Sibuyan, x.1922, C. F. Barker , (1 ♀ NMPC; 1 ♀ NHMB) ; Sibuyan Island , 1 ♂ ( MNHN) ; Sibuyan , 1 ♂ ( MNHN) ; Sibuyan Is. , v.1980, 1 ♂, 1 ♀ ( NMPC) ; Sibuyan Is. , 1 ♀ ( DFPC) . Romblon Island : Philippines, I. Romblon , R. Lumawig leg., iv.1979, 1 ♀ ( MNHN) ; Romblon, 1 ♀ ( MNHN) ; Romblon, 1980, Witzgall , 1 ♂, 1 ♀ ( SGBG) ; Romblon, 1981, Witzgall, (2 ♂♂, 1 ♀ SGBG; 1 ♀ ATMR, coll. R. Novak; Romblon, 1982, Witzgall, 1 ♀ ( SGBG); Prov. Sibujan , Romblon Isld. , vii.1984, 2 ♂♂, 8 ♀♀ ( ATMR, coll. R. Novak; Romblon, iv.1989, (1 ♂, 1 ♀ NMPC; 1 ♂ VKSC); Romblon, vi.1989, 1 ♂, 1 ♀ ( DFPC); Romblon, 31.viii.1995, Bourdant leg., 1 ♂ ( VKSC); Romblon Isl., v.1998, 4 ♂♂ ( SGBG); Romblon Isl., 24.x.1999, 1 ♀ ( VKSC); Romblon Isl, iv.2000, 3 ♂♂, 1 ♀ ( SGBG); Sibuyan Is., Romblon, 1 ♀ ( DFPC). Panay Island : Panay Is., 1 ♂ ( NMPC); Panay, Malindog Aklan mt., 10.iv.1993, Ben Villan coll., 2 ♀♀ ( VKSC); Panay, Malindog Aklan mt., 17.v.1993, Ben Villan coll., 1 ♀ ( VKSC); Panai Ins., Mt. Malindok Aklan, 24.5.1993, leg. Villah, 1 ♂, 3 ♀♀ ( WBWA); Panay, Mt. Tinagun , v.1996, 1 ♀ ( NMPC); Culasi, v.2018, 1 ♀ ( DFPC). Masbate Island: Masbate, Auros, 7 ♀♀ ( IRSN); Masbate, Auros, viii.1912, 7 ♀♀ ( MFNB). Cebu Island: Cebu City, Talamban, USC, Nasipit, 14.– 18.12.2005, leg. C. Pangantihon 1 ♂ ( WBWA). Mindanao Island : Est Mindanao, 1 ♀ ( MHNG); Mindanao, 1983, Coll. Leymann, 1 ♂ ( SGBG); N Mindanao, Bukidnon 18.iii.1993, 1 ♀ ( NMPC).

Redescription of holotype. Well preserved ♀ specimen with all appendages intact, only left fore leg without ultimate tarsomere. Length 30.00 mm, width 10.00 mm, length/width ratio: 3.00.

Head metallic purple with golden tint on frons. Pronotum dark metallic black with purplish and bluish tint. Scutellum bright metallic purple-golden. Elytra in general obscure metallic blue-black, costae silver with weak purplish tint. Ventral side dark metallic with violet tint. Lateroapical sides of ventrites metallic purple. Legs including tarsi metallic black with violet tint, ventral pads brown. Labrum, maxillae and labium including palpi yellow. Scape and pedicel metallic black, remaining antennomeres brownish-black.

Head densely punctate, punctures foveolate, each bearing long seta, thus frons densely pilose. Vertex less densely punctate and punctures bearing adherent setae.

Pronotum moderately densely macropunctate, shiny parts moderately densely micropunctate and weakly micro-reticulate. Central part with shiny areas. Macropunctation laterally gradually coarser and denser. Each macropuncture bearing moderately long white adherent seta. Medial line well visible, sparsely micropunctate, appears slightly elevated. Medial impressions very shallow, barely visible. Principal impressions barely visible, very shallow and hardly delimited from disc. Lateral impressions shallow, indistinct, only with a few fine punctures. Lateral margin rounded, distinct in basal 4/5 length.

Elytra regularly convex with distinctly elevated rounded costae along suture and on intervals 2, 4, 6 and 8. Interval 3 elevated only in basal 1/5 then vanishing. Interval 6 shortened, reaching to 3/4 length of elytra and there nearly merging with interval 4. Costae moderately densely micropunctate (at magnification 50 ×) and each with additional confusedly dispersed macropunctures. Intercostal depressions deep and very densely macropunctate. Punctation completely irregular, not forming rows or groups of punctures. Each macropuncture bearing short adherent white seta. Interspaces at maximum 2 × as wide as puncture diameter

Epipleura in basal 1/4 broad, moderately densely punctate, then continuously gradually narrowing apically; punctures becoming finer and vanishing towards apex. Each puncture bearing long erect white seta.

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

Ventral side of body ( Fig. 35 ) laterally coarsely and very densely punctate, only central parts of thoracic ven- trites sparsely punctate. Lateral sides of all abdominal ventrites densely and coarsely punctate in basal half, apical half with several sparsely distributed punctures ( Fig. 36 ).

Variation. Body ♂♂ (n=19) length: 19.50–26.00 mm, width: 7.00– 8.75 mm, length/width ratio: (2.78)2.86– 3.07(3.12); ♀♀ (n=44): length: 22.00– 32.25 mm, width: 7.75–11.25 mm, length/width ratio: 2.72–3.09. Body col- ouration always very dark metallic with bluish or violet metallic tint on costae, some specimens nearly black. Four studied specimens metallic dark bronze, and two metallic purple. Impressed areas on elytra usually silver but often also black; in aberrant bronze or purple specimens concolorous with costae. Punctation of pronotum very variable from moderately dense to very dense, punctures ranging from rather small (several specimens) to large and coarse in most specimens. Mid line more or less visible in all specimens. Principal impression in many specimens entirely indistinct. Structure of elytra more constant than that of pronotum. Costae always elevated, rounded; punctation in most specimens similar to that of holotype but in some, usually smaller sized specimens, coarser and present also more numerously on lateral sides of costae thus costae appear narrower.

Aedeagus (n=4) length: 6.33–6.88 mm, width 1.33–1.44 mm, length/width ratio: 4.63–4.84. Apices of parameres narrowing with outer side straight. Penis narrow, elongate, subparallel-sided, ventral side slightly impressed, lateral sides with deep canaliculus, which has both margins equal ( Fig. 80 ).

Differential diagnosis. Chrysodema (C.) sibuyanica can be easily distinguished from remaining species of the group by densely pubescent frons with long setae, while remaining species have it sparsely pubescent with short semiadhaerent hairs. Chrysodema (C.) sibuyanica also has very shallow and thus hardly visible principal impressions on pronotum, which are distinct in other species. Finally, it is the only species of the group occuring in Philippines.

Distribution. Philippines: Sibuyan, Romblon, Panay, Masbate, Cebu and? Mindanao islands (see remarks).

Remarks. We examined three specimens from Mindanao without further data. Therefore occurrence of this species in Mindanao should be verified with new material as the species is otherwise restricted to central Philippines (Panay, Romblon, Sibuyan, Masbate and Cebu).

We did not examine the specimen photographed in Lander (2003: Fig. 53 ), which almost certainly belongs to this species.

Figures

FIGURES 31–36. Chrysodema, general aspect: 31–33—C. (C.) dany sp. nov. (holotype, ♂ 28.75 mm). 34–36—C. (C.) sibuyanica Fisher, 1924 (holotype, ♀ 30.00 mm). 31, 34—dorsal view; 32, 35—ventral view; 33, 36—lateral view.

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 49–54. Chrysodema, general aspect: 49–51—C. (C.) dohrnii Saunders, 1874 (holotype, ♀ 27.50 mm). 52–54—C. (C.) fairmairei Kerremans, 1895 (lectotype, ♀ 28.25 mm)=C. (C.) dohrnii. 49, 52—dorsal view; 50, 53—ventral view; 51, 54—lateral view.