taxonID	type	description	language	source
03C687A4FFF69458FF505E82FDF7FDE3.taxon	description	(Figs. 1 – 3, 18)	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFF69458FF505E82FDF7FDE3.taxon	materials_examined	Type material. Holotype ♂ [the aedeagus is mounted on a separate plastic card using PVA glue and is pinned beneath the main specimen card. The apical abdominal tergite and sternite are also detached and glued to the same support card]: “ PHILIPPINES: / Mindoro Isl., Arangin, / Mt. Halcon. 01.2018. / local collector leg. ” [white label, printed]; // “ HOLOTYPE: / Campsosternus / mindorensis sp. nov. / A. Vanags des. 2025. ” [red label, printed] (DUBC). Paratypes: 1 ♂ [same data as holotype; same preparation method] (DUBC); 2 ♀♀ [same mounting method, without genitalia dissection]: “ PHILIPPINES: / Mindoro Isl., / Mindoro Oriental prov., / Baco. 10.2019. / local collector leg. [white label, printed] // “ PARATYPE: / Campsosternus / mindorensis sp. nov. / A. Vanags des. 2025. ” [red label, printed] (DUBC).	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFF69458FF505E82FDF7FDE3.taxon	description	Description. Body elongate, moderately robust; dark brown to coppery metallic, with subtle iridescence visible under oblique light. Total body length 29.9 mm; maximum elytral width 9.29 mm. Head uniformly dark brown, with slight metallic golden reflection; prognathous, moderately transverse (3.6 mm wide); frons distinctly concave and impressed medially. Surface sparsely and irregularly punctate; interspaces with fine microsculpture. Eyes prominent, hemispherical. Clypeus indistinctly delimited, slightly convex, covered with short golden setae. Antennae long, 9.3 mm in length, reaching base of pronotum when directed posteriorly; dark brown. Antennomere 2 small, globular; 3 elongate, rectangular, longer than wide; 4 elongate-triangular, narrowed basally, broadened apically. Antennomeres 4 – 6 serrate, forming saw-like edge; apical antennomere the narrowest, apically rounded, slender. Pronotum 7.04 mm long, 8.73 mm wide across posterior angles; distinctly trapezoidal, broader than head, widest at base, narrowing anteriorly. Medially convex, with sharply produced, posteriorly divergent hind angles forming acute tips. Each posterior angle bearing distinct carina. Lateral margins moderately arcuate; anterior margin shallowly sinuate. Lateral margins distinctly bordered; anterior margin narrowly bordered. Surface densely and coarsely punctate on disc, becoming gradually finer and sparser toward sides; lateral portions of pronotum covered with fine grey pubescence. Prosternum with glabrous punctate medial portion; lateral portions bearing fine pale pubescence. Hypomeron moderately concave, densely covered with fine pale pubescence. Metaventrite convex, with well-defined metathoracic discrimen extending nearly entire length. Medial portion smooth and shiny, with sparse punctation; lateral portions more densely punctate, with dense pale pubescence. Cuticle metallic brown. Scutellum 1.3 mm wide, 1.2 mm long; broadly rounded, smooth, impunctate, with distinct metallic sheen; dorsal surface weakly concave. Elytra elongate, 21.9 mm long, 9.29 mm wide; about 3.1 times as long as pronotum and approximately 1.06 times as wide. Elytra gradually tapering apically. Surface densely and finely punctate, with weak longitudinal striae present; cuticle smooth and glossy, with slight metallic luster. Trace of minute grey pubescence may be present near elytral base, though generally surface appears glabrous. Abdomen with five visible ventrites; ventrite V broadly rounded apically; VI – VIII reduced, forming part of genital capsule. Surface dark brown, metallic, densely punctate, covered with fine pubescence. Legs slender, moderately long. Femora slightly thickened apically, length 4.0 mm; tibiae straight, 3.5 mm long. Tarsi 5 - segmented, 3.9 mm in length (without claws), or 4.4 mm including claws. Claws simple. Surface dark metallic brown, finely pubescent. Male. Aedeagus (Fig. 18) symmetrical, elongate. Aedeagal length is 3 mm. Parameres elongate, nearly straight, apices broadly rounded, each bearing a small apico-lateral hook. Phallobase broad and short, with gently rounded anterior margin. Median lobe lanceolate, gradually tapering apically, projecting slightly beyond the apices of parameres. Female. Similar to male in overall morphology, but slightly more robust in build; pronotum proportionally somewhat broader compared to male.	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFF69458FF505E82FDF7FDE3.taxon	diagnosis	Diagnosis. Campsosternus mindorensis sp. nov. (Figs. 1 – 3) differs from related Philippine species by the presence of fine grey pubescence on both dorsal and ventral surfaces of the thorax, as well as on ventral side of the abdomen, and by more slender, elongate body. It is similar to C. cantori Hope, 1843 from India, but easily distinguished from it by much smaller body size, metallic coloration dark brown to bronze without strong purplish reflection, and by the presence of sharply developed lateral carinae on posterior angles of the pronotum. Elytral and abdominal pubescence less developed than these in C. cantori.	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFF69458FF505E82FDF7FDE3.taxon	etymology	Etymology. The specific epithet is the latinized adjective derived from the name of the island where the specimens were collected.	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFF69458FF505E82FDF7FDE3.taxon	distribution	Distribution. Philippines: Mindoro.	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFF0945AFF505E9AFC3AFCDF.taxon	description	(Figs. 4 – 6, 14, 17)	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFF0945AFF505E9AFC3AFCDF.taxon	materials_examined	Type material. Syntype of C. proteus, ♀ (Figs. 4 – 6): “ Proteus / Hope / Manilla ” [white, handwritten label]; // “ Type / Hope / Trans. Ent: Soc / 3 - 1843 / p. 291 / Coll. Hope Oxon. ” [white label with red border; partly printed, partly handwritten]; // “ Rutilans ♀? ” [white label, handwritten]; // “ Type: Coll: 1529 / Campsosternus / proteus / Hope / Hope dept. Oxford ” [white with black border, museum label] (OUMNH). Additional material. PHILIPPINES: LUZON: 1 ♀: “ North Luzon, Mt. Province, Barlig, 12.2017 ” (DUBC); 2 ♀♀, 3 ♂♂: “ North Luzon, Madela, Quirino, 01.2016 - 10.2017 ” (DUBC); 1 ♀: “ Eastern Luzon, Cagayan valley, Quirino, Disimungal, 06.2015 ” (DUBC); 13 ♀♀, 4 ♂♂: “ Eastern Luzon, Sierra Madre, Dingalan, Aurora, 06.2015 - 05.2018 ” (DUBC); 1 ♂: “ Eastern Luzon, Sierra Madre, Rodrigues, Rizal, 03.2018 ” (DUBC); 1 ♀: “ North Luzon, Cagayan, Sta Ana, 06.2022 ” (DUBC); 1 ♀: “ Eastern Luzon, Isabela, 08.2013 ” (DUBC); LEYTE: 1 ♂, 2 ♀♀: “ Leyte, Mahaplag, 08.2017 - 05.2018 ” (DUBC); 1 ♀: “ Leyte, Sogod, 01.2015 ” (DUBC); PANAY: 2 ♀♀: “ Panay, Antique, 09.2018 ” (DUBC); 1 ♂: “ Panay, Antique, Culasi, 04.2018 ” (DUBC); 2 ♂♂: “ Panay, Antique, Mt. Madja-as, 11.2017 ” (DUBC); SAMAR: 1 ♀, 2 ♂♂: “ Samar, Lope de Vega, 03.2018 - 02.2019 ” (DUBC).	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFF0945AFF505E9AFC3AFCDF.taxon	description	Description. Body length 29 – 34 mm (n = 10, ♂♂ = 5, ♀♀ = 5), maximum elytral width 9.0 – 11.2 mm. Body robust, elongate. Dorsal surface glossy, bright metallic. Coloration predominantly green, with golden reflections; some specimens with reddish or pinkish reflections, especially on pronotum and elytra. Head transverse, frons concave medially, punctation fine, irregular. Antennae moderately long (9 mm), almost reaching the base of the pronotum, dark brown; antennomere 2 small, subglobular; antennomere 3 elongate; antennomeres 4 – 10 triangular, forming a serrate margin; apical antennomere slender, apically rounded. No sexual dimorphism in antennal morphology was observed. Pronotum (Fig. 14) trapezoidal, 7.5 – 8.5 mm long, 9.5 – 10.5 mm wide across posterior angles; posterior angles acute, divergent, each with sharp carina. Pronotal punctation fine, becoming obsolete posteromedially; disc smooth, glossy, without depressions. Scutellum rounded, smooth, metallic, 1.5 – 1.8 mm wide. Elytra elongate, 21 – 25 mm long, 9 – 11 mm wide, tapering apically; surface glossy, metallic green to golden, with weak striae; punctation fine, regular. Ventral surface metallic, smooth, sparsely pubescent. Legs slender, metallic, femora slightly thickened with fine pubescence; tarsi 4.5 – 5.0 mm (without claws). Aedeagus (Fig. 17) robust, well-sclerotized, symmetrical and elongate. Aedeagal length is 4 mm. Phallobase broad, relatively short. Parameres elongate, apically expanded; apices pointed, each bearing a short apico-lateral hook. Median lobe elongate, broad basally, gradually tapering apically, extending slightly beyond the apices of parameres; apex narrowly rounded. Variation. Metallic coloration variable. Most specimens bright metallic green, some with golden reflections; others with distinct reddish reflections on dorsum, especially pronotum and elytra. Intensity of metallic gloss also variable, but surface always glossy, never dull as in C. r. mindanaoensis.	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFF0945AFF505E9AFC3AFCDF.taxon	distribution	Distribution. Philippines: Luzon, Samar, Leyte.	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFF0945AFF505E9AFC3AFCDF.taxon	diagnosis	Diagnosis. It differs from С. r. mindanaoensis (Figs. 7 – 9) by glossy metallic dorsum; pronotal punctation fine, becoming obsolete in posteromedial area; pronotal surface smooth and shiny.	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFF0945AFF505E9AFC3AFCDF.taxon	discussion	Comments. This is the nominotypical subspecies, corresponding to the population from Luzon, including the type locality (Manila). The body of the holotype of C. rutilans in the Museum National d’Histoire Naturelle, Paris is reported as lost, with only a single leg remaining (Van Zwaluwenburg 1959). Campsosternus sumptuosus was later considered a variety of C. rutilans (Candèze 1891), and its true origin is unclear. Although originally attributed to Java, Hope (1843) suggested that at least one specimen came from Manila, indicating that it may in fact belong to the Philippine fauna. The type of C. proteus bears a handwritten label added by Candèze reading “ Rutilans ♀? ”, and based on external morphology, it appears conspecific to specimens historically identified as C. rutilans. Van Zwaluwenburg (1959) supported this interpretation, noting that a comparison between the C. proteus type and a female specimen of C. rutilans from the Philippines revealed no structural differences. While C. proteus (Figs. 4 – 6) was described as slightly paler and more golden in coloration, Van Zwaluwenburg considered Candèze’s suggestion that C. proteus represents a variety of C. rutilans to be probably valid. The original description of C. proteus emphasizes considerable variability in size, color, and external form among the specimens examined. Hope noted that individuals varied from blue to green, golden, and bronzed, and suggested that “ two or three species may be confounded under the name of proteus. ” Campsosternus proteus was also described from Manila, the same locality as C. rutilans, further supporting their conspecific status. This highlights the fact that the species was described based on a potentially mixed series and that the name C. proteus was applied to more than one taxon from the start. Consequently, the description is of limited diagnostic value, and examination of the type confirms that C. proteus is conspecific with C. rutilans. Identification of type material: At present, only a single syntype is known and was available for examination. No evidence for the presence of additional syntypes could be found.	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFF2945BFF505F96FE8BFD9A.taxon	description	(Figs 7 – 9, 10 – 12, 13, 16)	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFF2945BFF505F96FE8BFD9A.taxon	materials_examined	Type material. Holotype ♂: “ PHILIPPINES Mindanao, / Davao del Sur, Kapatagan. / 12.2019 ” [white label, printed] // “ HOLOTYPE: / Campsosternus rutilans / mindanaoensis ssp. nov. / A. Vanags des. 2025 ” [red label, printed] (DUBC). Paratypes. PHILIPPINES: MINDANAO: 1 ♂: “ Mindanao, / Agusan del Sur, San Luis. / 04.2018. ” [white label, printed] (DUBC); 2 ♂♂: “ Mindanao, / Bukidnon, 06.2013. ” [white label, printed] (DUBC); 1 ♀: “ PHILIPPINES Mindanao, Lanao / del Sur, Wao. 04.2018. local / collector leg. ” [white label, printed] (DUBC); 5 ♂♂, 2 ♀♀: “ Mindanao, Agusan del / Sur, Esperanza. / 04 – 05.2018. ” [white label, printed] (DUBC); 1 ♂: “ Mindanao, Cotabato. / 04.2013. / local collector leg. ” [white label, printed] (DUBC); 2 ♂♂, 2 ♀♀: “ Mindanao, South / Cotabato, Mt. Parker. / 04 – 06.2018. ” [white label, printed] (DUBC); 2 ♂♂, 1 ♀: “ Mindanao, / Compostela Valley. / 05.2018. ” [white label, printed] (DUBC); 1 ♂: “ Mindanao, Davao, Marilog Distr., / Baganihan / 27.2018. / A. Rukmane leg. ” [white label, printed] (DUBC); 2 ♂♂, 4 ♀♀: “ Mindanao, Lanao del / Sur, Wao. 03.2018. ” [white label, printed] (DUBC); 1 ♂: “ Mindanao, Mt. / Hamiguitan, 410 – 500 m, / 6.73493 N, 126.14129 E, 19 – 24. / 05.2025. Barševskis A. leg. ” [white label, printed] (DUBC); 1 ♀: “ Mindanao, Surigao del / Sur, San Agustin. / 07.2023. ” [white label, printed] (DUBC); 3 ♂♂: “ Mindanao, / Bukidnon, Intavas. / 06.2015. ” [white label, printed] (DUBC). All paratypes with an additional red printed label: “ PARATYPE: / Campsosternus rutilans / mindanaoensis ssp. nov. / A. Vanags des. 2025 ” (DUBC).	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFF2945BFF505F96FE8BFD9A.taxon	description	Description. Body length 35.0 mm, maximum elytral width 11.2 mm. Head 3.1 mm wide, transverse; frons concave medially, densely punctate. Antennae 10.3 mm long, reaching pronotal base; antennomeres 4 – 10 serrate, dark brown to black. Pronotum (Fig. 13) 8.5 mm long, 10.4 mm wide across posterior angles, trapezoidal; posterior angles acute, divergent, each with sharp carina; surface coarsely punctate throughout, punctures dense, not obsolete in posteromedial part; cuticle dull metallic, golden-green. Scutellum 1.6 mm wide, 1.4 mm long, broadly rounded, smooth, metallic. Elytra 24.8 mm long, 11.2 mm wide, about 3 times as long as pronotum, tapering apically; surface with coarse punctation and faint longitudinal striae; coloration dull golden-green. Legs slender: femur 4.6 mm, tibia 4.2 mm, tarsus 4.9 mm (without ungues); legs with grey pubescence; claws simple. Abdomen with five ventrites visible, surface coarsely punctate, with short pubescence. Aedeagus (Fig. 16) symmetrical, elongate, and well sclerotized. Aedeagal length is 4 mm. Phallobase short and broad. Parameres slender, elongate, expanded apically, with pointed apices and a short apico-lateral hook on each side. Median lobe elongate, basally broad, tapering distally and extending slightly beyond the parameres; apex narrowly rounded. Sexual dimorphism. Female is similar to male, slightly more robust; pronotum proportionally broader. Variation. Coloration highly variable (Figs. 10 – 12), ranging from bright green to dark bluish-violet. Dorsal surface always dull, lacking glossy reflections of C. r. rutilans. Some specimens predominantly green, others dark blue to nearly blackish. Despite strong color variation, pronotal punctation consistently coarse and dense.	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFF2945BFF505F96FE8BFD9A.taxon	diagnosis	Diagnosis. Campsosternus rutilans mindanaoensis ssp. nov. (Figs 7 – 9) differs from C. r. rutilans and C. r. cupreus ssp. nov. by matte metallic dorsum, coloration bluish-green to dark blue, with coarse, dense punctation on the pronotum and elytra; pronotal surface dull, without glossy sheen.	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFF2945BFF505F96FE8BFD9A.taxon	distribution	Distribution. Philippines: Mindanao.	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFF2945BFF505F96FE8BFD9A.taxon	discussion	Comments. The new subspecies represents geographically isolated population of C. rutilans characterized by matte dorsum and coarser punctation. Transitional specimens not observed between Luzon and Mindanao populations.	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFFC9456FF5058EBFEB4FE77.taxon	description	(Figs. 15, 19 – 21)	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFFC9456FF5058EBFEB4FE77.taxon	materials_examined	Type material. Holotype ♀: “ PHILIPPINES, Negros, / Don Salvador Benedicto, / Oriental Central Visayas. / 04.2017. ” [white label, printed] // “ HOLOTYPE: / Campsosternus rutilans / cupreus ssp. nov. / A. Vanags des. 2025 ” [red label, printed] (DUBC). Paratypes. PHILIPPINES: NEGROs: 7 ♀♀: “ Negros, / Don Salvador Benedicto, / Oriental Central Visayas. / 03 – 08.2017 – 2020. ” [white label, printed] (DUBC); PANAY: 1 ♂, 8 ♀♀: “ Panay, / Antique, Culasi. / 04.2018. ” [white label, printed] (DUBC); 2 ♀♀: “ Panay, / Aklan. / 06 – 08.2018. ” [white label, printed] (DUBC). All paratypes with an additional red printed label: “ PARATYPE: / Campsosternus rutilans / cupreus ssp. nov. / A. Vanags des. 2025 ” (DUBC).	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFFC9456FF5058EBFEB4FE77.taxon	description	Description. Body length 33.0 mm, maximum elytral width 10.9 mm. Head 3.9 mm wide, transverse; frons concave, finely punctate. Antennae 9.4 mm long, reaching pronotal base; antennomeres 4 – 10 serrate, dark brown to black. Pronotum (Fig. 15) 8.3 mm long, 10.9 mm wide across posterior angles, trapezoidal; posterior angles acute, divergent, each with sharp carina; surface finely punctate; cuticle coppery-bronze, shiny. Pronotal disc with two deep, symmetrical depressions. Scutellum 1.8 mm wide, 1.4 mm long, rounded, smooth, metallic. Elytra 23.0 mm long, 10.9 mm wide, elongate, tapering apically; surface coppery to reddish, shiny, finely punctate; striae weak. Legs slender: femur 5.0 mm, tibia 4.6 mm, tarsus 5.7 mm (without claws); claws simple; legs with fine grey pubescence. Ventral surface dark bronze, covered with short greyish pubescence. Abdomen with five visible ventrites, moderately punctate, covered with fine pubescence. Sexual dimorphism. Males generally smaller, more slender; pronotum proportionally narrower than in females. In examined material females were notably more abundant than males. Variation. Body size variable, ranging from 26 – 36 mm (n = 10; mean 31.3 mm). Coloration predominantly reddish-coppery to bronze, with slight greenish reflections in some specimens. Pronotal discal depressions variable in number and depth: most Panay specimens have 2 distinct depressions, some specimens have 4, some specimens lack depressions.	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFFC9456FF5058EBFEB4FE77.taxon	diagnosis	Diagnosis. Campsosternus rutilans cupreus ssp. nov. (Figs. 19 – 21) can be distinguished from C. r. rutilans by coppery to reddish-bronze dorsal coloration from C. r. mindanaoensis ssp. nov. by finer pronotal punctation and smaller body size.	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFFC9456FF5058EBFEB4FE77.taxon	distribution	Distribution. Central Philippines: Panay and Negros islands.	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFFC9456FF5058EBFEB4FE77.taxon	discussion	Comments. The new subspecies represents a geographically isolated population of C. rutilans in the central Philippines.	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFFF9450FF505AFAFB48FCDF.taxon	description	(Fig. 22)	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFFF9450FF505AFAFB48FCDF.taxon	materials_examined	Type material. Syntype of C. leachii, ♀ (Fig. 22): “ Leachii Hope. / Singapore ” [white, handwritten label]; // “ Type / Hope / Trans. Ent: Soc / 3 - 1843 / p. 291 / Coll. Hope Oxon. ” [white label with red border; partly printed, partly handwritten]; // “ Type Col: 1530 / Campsosternus / leachii Hope / Hope dept. Oxford ” [white with black border, museum label] (OUMNH); Syntype of C. eschscholtzii, sex uncertain (Fig. 23): “ Eschscholtzii / Hope. ” [white, handwritten label]; // “ Type / Hope / Trans. Ent: Soc / 3 - 1843 / p. 292 / Coll. Hope Oxon. ” [white label with red border; partly printed, partly handwritten]; // “ C. leachii = C. eschscholtzii ” [white, handwritten label]; // “ Type Col: 1528 / Campsosternus / eschscholtzii / Hope / Hope dept. Oxford ” [white with black border, museum label] (OUMNH).	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
03C687A4FFFF9450FF505AFAFB48FCDF.taxon	discussion	Comments. Campsosternus leachii (Fig. 22) was originally described from “ India Orientali circa Singapore ”, whereas C. eschscholtzii (Fig. 23) was described from “ Manilla ”. Direct examination of the type specimens of both nominal taxa revealed no consistent morphological differences, and the two specimens are here considered conspecific. An old handwritten label attached to the type of C. eschscholtzii (“ C. leachii = C. eschscholtzii ”) indicates that this synonymy had already been suspected by a previous researcher, although it was never formally published. Hope's original descriptions are brief and rely primarily on general coloration. This is a character known to be variable within the genus Campsosternus and does not provide diagnostic features that separate the two nominal taxa. Both names were published in 1843. C. leachii has priority based on page number and is therefore the valid name. C. eschscholtzii is classified as a synonym. No additional material referable to this morphotype from India Orientalis, circa Singapore, was available. Despite extensive material examined from the Philippines, no specimens corresponding to this morphology were found. This raises doubts regarding the accuracy of the published type locality of C. eschscholtzii. In the absence of additional evidence, the type locality is retained as originally stated. Because no specimens referable to this species were found among the Philippine material, C. leachii is not treated as part of the Philippine fauna.	en	Vanags, Artūrs (2026): A review of the Philippine Campsosternus (Coleoptera: Elateridae), with descriptions of new taxa. Zootaxa 5777 (1): 155-168, DOI: 10.11646/zootaxa.5777.1.7, URL: https://doi.org/10.11646/zootaxa.5777.1.7
