taxonID	type	description	language	source
E7E6BEA89BD55F5780F179CBAFFF4E39.taxon	description	Fig. 2	en	Varga, Oleksandr, Di Giovanni, Filippo (2025): Revision of the Western Palaearctic species of Orthocentrus Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Orthocentrinae): species with ivory / yellow marks on the vertex. Journal of Hymenoptera Research 98: 841-860, DOI: 10.3897/jhr.98.163947
E7E6BEA89BD55F5780F179CBAFFF4E39.taxon	diagnosis	Diagnosis. Female. Face papillate; eye sparsely setose (Fig. 2 D). Antenna with 27 – 28 flagellomeres, first flagellomere 1.4 – 1.5 × as long as wide (Fig. 2 B). Vertex yellow along inner orbits. Mesosoma largely marked with orange and yellow, mesoscutum yellow / orange along notauli and on lateral margins and scutellum orange (Fig. 2 E). Fore wing with vein 3 rs-m present, areolet sessile (Fig. 2 A); hind wing with nervellus intercepted below the middle (Fig. 2 C). Metasomal tergites granulate, banded with yellow posteriorly (Fig. 2 A, F); first tergite 1.4 – 1.5 × as long as posterior width, with latero-median longitudinal carinae present, but weak; second tergite 0.8 – 1.0 × as long as posterior width; tergites 2 – 3 each with a strong subapical transverse furrow, granulate (Fig. 2 F). Male. Unknown.	en	Varga, Oleksandr, Di Giovanni, Filippo (2025): Revision of the Western Palaearctic species of Orthocentrus Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Orthocentrinae): species with ivory / yellow marks on the vertex. Journal of Hymenoptera Research 98: 841-860, DOI: 10.3897/jhr.98.163947
E7E6BEA89BD55F5780F179CBAFFF4E39.taxon	distribution	Distribution. Currently known only from the South of France (Aubert 1978) and Central Italy (first record). Possibly a Tyrrhenian species.	en	Varga, Oleksandr, Di Giovanni, Filippo (2025): Revision of the Western Palaearctic species of Orthocentrus Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Orthocentrinae): species with ivory / yellow marks on the vertex. Journal of Hymenoptera Research 98: 841-860, DOI: 10.3897/jhr.98.163947
B6063E49EDED5D9F98212D20726C69BB.taxon	description	Fig. 3	en	Varga, Oleksandr, Di Giovanni, Filippo (2025): Revision of the Western Palaearctic species of Orthocentrus Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Orthocentrinae): species with ivory / yellow marks on the vertex. Journal of Hymenoptera Research 98: 841-860, DOI: 10.3897/jhr.98.163947
B6063E49EDED5D9F98212D20726C69BB.taxon	diagnosis	Diagnosis. Female. Face aciculate in upper half, shiny; eye glabrous (Fig. 3 E). Antenna with 26 flagellomeres, first flagellomere 2.5 × as long as wide (Fig. 3 F). Frons entirely ivory except for interocellar area (Fig. 3 F). Mesosoma largely marked with orange and yellow; mesoscutum and scutellum orange, yellow along notauli and on lateral margins (Fig. 3 A, B). Fore wing with vein 3 rs-m present, but partly unpigmented, areolet petiolate (Fig. 3 C); hind wing with nervellus intercepted below the middle (Fig. 3 A). First metasomal tergite 1.8 × as long as posterior width, weakly granulate, with lateromedian longitudinal carinae indistinct; second tergite 1.2 × as long as posterior width, with a weak subapical transverse furrow, weakly granulate; third tergite weakly granulate on anterior 0.2 (Fig. 3 A, G). Male. Unknown.	en	Varga, Oleksandr, Di Giovanni, Filippo (2025): Revision of the Western Palaearctic species of Orthocentrus Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Orthocentrinae): species with ivory / yellow marks on the vertex. Journal of Hymenoptera Research 98: 841-860, DOI: 10.3897/jhr.98.163947
B6063E49EDED5D9F98212D20726C69BB.taxon	distribution	Distribution. Spain: currently known from two localities on Tenerife (Hellén 1949).	en	Varga, Oleksandr, Di Giovanni, Filippo (2025): Revision of the Western Palaearctic species of Orthocentrus Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Orthocentrinae): species with ivory / yellow marks on the vertex. Journal of Hymenoptera Research 98: 841-860, DOI: 10.3897/jhr.98.163947
A26A988F67BD5FBF87131D9C3EA8685D.taxon	description	Fig. 4	en	Varga, Oleksandr, Di Giovanni, Filippo (2025): Revision of the Western Palaearctic species of Orthocentrus Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Orthocentrinae): species with ivory / yellow marks on the vertex. Journal of Hymenoptera Research 98: 841-860, DOI: 10.3897/jhr.98.163947
A26A988F67BD5FBF87131D9C3EA8685D.taxon	diagnosis	Diagnosis. Female. Face aciculate; eye glabrous (Fig. 4 E). Antenna with 26 – 29 flagellomeres, first flagellomere 2.0 – 2.4 × as long as wide (Fig. 4 B). Vertex yellow or ivory along inner orbits (Fig. 4 D). Mesosoma black, with only propleuron and pronotum largely marked with yellow (Fig. 4 A). Fore wing with vein 3 rs-m present, areolet petiolate; hind wing with nervellus intercepted below the middle (Fig. 4 A). First metasomal tergite 1.7 – 1.8 × as long as posterior width, weakly granulate, with latero-median longitudinal carinae weak to indistinct; second tergite 1.1 × as long as posterior width, with a weak subapical transverse furrow, weakly granulate (Fig. 4 G); third tergite weakly granulate on anterior 0.4. Male. See remark.	en	Varga, Oleksandr, Di Giovanni, Filippo (2025): Revision of the Western Palaearctic species of Orthocentrus Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Orthocentrinae): species with ivory / yellow marks on the vertex. Journal of Hymenoptera Research 98: 841-860, DOI: 10.3897/jhr.98.163947
A26A988F67BD5FBF87131D9C3EA8685D.taxon	distribution	Distribution. Spain, France (Aubert 1978),? Bulgaria (Kolarov 1986), Iran (Mohammadi-Khoramabadi and Talebi 2013),? Cyprus (see remark), first record for Italy.	en	Varga, Oleksandr, Di Giovanni, Filippo (2025): Revision of the Western Palaearctic species of Orthocentrus Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Orthocentrinae): species with ivory / yellow marks on the vertex. Journal of Hymenoptera Research 98: 841-860, DOI: 10.3897/jhr.98.163947
C2E352306B0050939D592986AF3FC57A.taxon	diagnosis	Diagnosis. The Western Palaearctic species are small to relatively large (fore wing 2 – 5 mm long) orthocentrines. Head in dorsal view strongly transverse to almost cubic (Fig. 1). Face densely punctate, papillate or aciculate on smooth or granulate background. Clypeus fused with face, forming uniformly convex surface; lower edge of clypeus usually rounded or rarely straight to weakly truncate; labrum usually hidden, but sometimes visible (Figs 2 D, 3 E, 4 E, F, 5 C, 6 B, 7 D, E). Scape usually long, subcylindrical. Mandibles usually bidentate, narrowed apically, lower tooth much shorter than upper tooth, visible in frontoventral view, but sometimes mandibles twisted, and thus lower tooth is vestigial and not visible. Subocular sulcus present to absent. Notauli present anteriorly or absent. Epicnemial carina present laterally and ventrally. Pleural carina present (Fig. 6 C). Propodeum usually with lateral longitudinal, lateromedian longitudinal and posterior transverse carinae present (Fig. 6 E). Fore wing with vein 3 rs-m present or absent, areolet (if closed) sessile or petiolate, quadrate or pentagonal (Figs 2 C, 3 C, 5 A, B, 6 F). Hind wing with nervellus reclivous, inclivous or vertical, usually broken, but rarely second abscissa of Cu entirely absent. First metasomal tergite from smooth and shiny to granulate, wrinkled or rugose (Figs 2 F, 3 G, 4 G, H, 5 D, E, 6 G, H, 7 H, I). Ovipositor straight or upcurved, with or without dorsal subapical notch, at most 0.5 × the length of the hind tibia; ovipositor sheath setose except basally, parallel-sided to widened distally.	en	Varga, Oleksandr, Di Giovanni, Filippo (2025): Revision of the Western Palaearctic species of Orthocentrus Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Orthocentrinae): species with ivory / yellow marks on the vertex. Journal of Hymenoptera Research 98: 841-860, DOI: 10.3897/jhr.98.163947
CC498AEDB55E5829888F8D5DE9910FD1.taxon	description	Fig. 5	en	Varga, Oleksandr, Di Giovanni, Filippo (2025): Revision of the Western Palaearctic species of Orthocentrus Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Orthocentrinae): species with ivory / yellow marks on the vertex. Journal of Hymenoptera Research 98: 841-860, DOI: 10.3897/jhr.98.163947
CC498AEDB55E5829888F8D5DE9910FD1.taxon	diagnosis	Diagnosis. Female. Face densely papillate; eye densely setose (Fig. 5 C). Antenna with 33 – 35 flagellomeres, first flagellomere 1.0 – 1.1 × as long as wide. Vertex with yellow along inner orbits. Mesosoma black; mesoscutum sometimes with yellow lines along notauli. Fore wing with vein 3 rs-m present, areolet sessile; hind wing with nervellus intercepted below the middle (Fig. 5 A, B). First metasomal tergite 1.5 × as long as posterior width, granulate, with lateromedian longitudinal carinae strong; second tergite 0.9 – 1.0 × as long as posterior width, with a strong subapical transverse furrow, granulate (Fig. 5 D); third tergite weakly granulate. Male. Generally resembles female, but has more abundant yellow on the head, pronotum and mesoscutum (Fig. 5 B); shorter antenna, with 26 – 27 flagellomeres (first flagellomere 1.6 – 1.7 × as long as wide) and almost entirely yellow third tergite (Fig. 5 E).	en	Varga, Oleksandr, Di Giovanni, Filippo (2025): Revision of the Western Palaearctic species of Orthocentrus Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Orthocentrinae): species with ivory / yellow marks on the vertex. Journal of Hymenoptera Research 98: 841-860, DOI: 10.3897/jhr.98.163947
CC498AEDB55E5829888F8D5DE9910FD1.taxon	distribution	Distribution. Palaearctic (Yu et al. 2016; Humala et al. 2020), first records for Italy, Sweden and Ukraine.	en	Varga, Oleksandr, Di Giovanni, Filippo (2025): Revision of the Western Palaearctic species of Orthocentrus Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Orthocentrinae): species with ivory / yellow marks on the vertex. Journal of Hymenoptera Research 98: 841-860, DOI: 10.3897/jhr.98.163947
2D79000EF5FF589F99FD7AADC6F6B837.taxon	description	Fig. 6	en	Varga, Oleksandr, Di Giovanni, Filippo (2025): Revision of the Western Palaearctic species of Orthocentrus Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Orthocentrinae): species with ivory / yellow marks on the vertex. Journal of Hymenoptera Research 98: 841-860, DOI: 10.3897/jhr.98.163947
2D79000EF5FF589F99FD7AADC6F6B837.taxon	diagnosis	Diagnosis. Orthocentrus mirabilis sp. nov. is characterized by the combination of the following: face sparsely punctate, with traces of granulation; eye glabrous (Fig. 6 B); antenna with 26 – 27 flagellomeres, first flagellomere 3.0 – 3.1 × as long as wide (Fig. 6 C); vertex yellow along inner orbits (Fig. 6 D); mesosoma largely marked with orange and yellow, scutellum orange (Fig. 6 C, E); fore wing with vein 3 rs-m present, areolet petiolate; hind wing with nervellus intercepted below the middle (Fig. 6 F); metasomal tergites strongly longitudinally wrinkled on smooth and shiny background, banded with yellow posteriorly (Fig. 6 G, H); first tergite 1.4 – 1.5 × as long as posterior width, with lateromedian longitudinal carinae strong; second tergite 1.0 – 1.1 × as long as posterior width, with deep transverse furrow (Fig. 6 G). Orthocentrus mirabilis sp. nov. differs from all known Western Palaearctic species with a yellow vertex by the strongly longitudinally wrinkled metasoma. Orthocentrus mirabilis sp. nov. is similar to the Korean O. flavescens Humala & Lee, 2020, but differs by the longer antenna with 26 – 27 flagellomeres (20 in O. flavescens) and the fore wing with vein 3 rs-m present (absent in O. flavescens).	en	Varga, Oleksandr, Di Giovanni, Filippo (2025): Revision of the Western Palaearctic species of Orthocentrus Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Orthocentrinae): species with ivory / yellow marks on the vertex. Journal of Hymenoptera Research 98: 841-860, DOI: 10.3897/jhr.98.163947
2D79000EF5FF589F99FD7AADC6F6B837.taxon	description	Description. Female. Holotype. Body length 5 mm. Fore wing 3.5 mm. Head weakly sculptured and densely pubescent. Antenna with 27 flagellomeres, first flagellomere 3.1 × as long as wide. Face about 0.7 × as long as wide, sparsely punctate, weakly granulate between punctures, sparsely pubescent; inner orbits divergent ventrally. Malar space 3.3 × basal width of mandible; subocular sulcus distinct. Clypeus 0.5 × as long as wide, fused with face, apical margin weakly truncate. Mandible strongly bent outward, lower tooth not visible due to mandible position. Temples strongly narrowed in dorsal view; head 1.9 × as wide as high in dorsal view. Frons and vertex weakly granulate; length of ocellar-ocular distance about 1.0 × maximum diameter of lateral ocellus; occipital carina absent. Propleuron densely pubescent. Pronotum smooth; epomia absent. Mesoscutum densely pubescent; notauli deep anteriorly; scutellum densely pubescent. Mesopleuron smooth and densely pubescent on anterior half; epicnemial carina present ventrally and laterally, reaching anterior margin of mesopleuron. Metapleuron smooth, densely pubescent along margins; pleural and submetapleural carinae present. Propodeum smooth, with lateral longitudinal, lateromedian longitudinal and posterior transverse carinae present. Legs relatively stout; hind femur 3.1 × as long as wide, third tarsomere of hind tarsus about 0.8 × as long as fifth tarsomere; tarsal claws simple. Fore wing with vein 2 rs-m about 1.0 × distance between 2 rs-m and 2 m-cu; vein 3 rs-m present, partly unpigmented; vein 1 cu-a weakly distal to M & Rs; hind wing with nervellus intercepted below middle, more or less vertical, distal abscissa of Cu largely unpigmented. First metasomal tergite 1.5 × as long as posterior width, longitudinally wrinkled, smooth and shiny; latero-median longitudinal carinae strong; lateral oblique grooves present. Second tergite 1.1 × as long as posterior width, longitudinally wrinkled, with deep transverse furrow; thyridium small. Tergites 3 – 4 same structure and sculpture as previous tergite. Fifth tergite more weakly sculptured on anterior 0.8, with transverse furrow absent. Sixth tergite densely pubescent and smooth. Ovipositor very short, not strongly projecting beyond apex of metasoma, its sheath slightly widened and pubescent. Colour. Head largely yellow except antenna, frons, vertex and gena partly black. Mesosoma black except propleuron and pronotum largely yellow, meso- and metapleuron largely orange and yellow, mesoscutum with narrow orange stripes, scutellum orange. Fore and mid coxae, trochanters and trochantelli yellow, fore and mid femora, tibiae and tarsi orange; hind legs orange except trochanters and trochantelli, tibia basally and tarsomeres largely yellow. Metasoma black except tergites 1 – 5 posteriorly banded with yellow. Male. Unknown.	en	Varga, Oleksandr, Di Giovanni, Filippo (2025): Revision of the Western Palaearctic species of Orthocentrus Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Orthocentrinae): species with ivory / yellow marks on the vertex. Journal of Hymenoptera Research 98: 841-860, DOI: 10.3897/jhr.98.163947
2D79000EF5FF589F99FD7AADC6F6B837.taxon	etymology	Etymology. The new species is named after the relatively colourful body in comparison to the other European species of the genus. Adjective.	en	Varga, Oleksandr, Di Giovanni, Filippo (2025): Revision of the Western Palaearctic species of Orthocentrus Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Orthocentrinae): species with ivory / yellow marks on the vertex. Journal of Hymenoptera Research 98: 841-860, DOI: 10.3897/jhr.98.163947
2D79000EF5FF589F99FD7AADC6F6B837.taxon	distribution	Distribution. Currently known from Belgium, Italy, Poland, Sweden, Ukraine (this study), and erroneously reported as O. castellanus from UK (Galsworthy 2022),? Germany (Riedel et al. 2021), and? South Korea (Humala et al. 2020) (see Discussion).	en	Varga, Oleksandr, Di Giovanni, Filippo (2025): Revision of the Western Palaearctic species of Orthocentrus Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Orthocentrinae): species with ivory / yellow marks on the vertex. Journal of Hymenoptera Research 98: 841-860, DOI: 10.3897/jhr.98.163947
5DB735AB9DCA5945AABDBBE96F6C4FE0.taxon	description	Fig. 7	en	Varga, Oleksandr, Di Giovanni, Filippo (2025): Revision of the Western Palaearctic species of Orthocentrus Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Orthocentrinae): species with ivory / yellow marks on the vertex. Journal of Hymenoptera Research 98: 841-860, DOI: 10.3897/jhr.98.163947
5DB735AB9DCA5945AABDBBE96F6C4FE0.taxon	diagnosis	Diagnosis. Female. Face aciculate; eye glabrous (Fig. 7 D). Antenna with 24 – 26 flagellomeres, first flagellomere 1.6 – 1.7 × as long as wide (Fig. 7 C). Vertex yellow or ivory along inner orbits (Fig. 7 D, F). Mesosoma black except narrowly yellow on propleuron, and along upper and lower margins of pronotum (Fig. 7 A). Fore wing with vein 3 rs-m present, areolet petiolate; hind wing with nervellus intercepted below the middle (Fig. 7 A). First metasomal tergite 1.5 – 1.6 × as long as posterior width, granulate, with lateromedian carinae weak to indistinct; second tergite 1.2 × as long as posterior width, with a weak subapical transverse furrow, granulate (Fig.); third tergite weakly granulate on anterior 0.5. Male. Resembles female, but has more abundant yellow on the head, pronotum and mesoscutum; shorter antenna with 24 – 27 flagellomeres with the first flagellomere 3.0 – 3.1 × as long as wide (Fig. 7 B, E, G, I).	en	Varga, Oleksandr, Di Giovanni, Filippo (2025): Revision of the Western Palaearctic species of Orthocentrus Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Orthocentrinae): species with ivory / yellow marks on the vertex. Journal of Hymenoptera Research 98: 841-860, DOI: 10.3897/jhr.98.163947
5DB735AB9DCA5945AABDBBE96F6C4FE0.taxon	distribution	Distribution. Western Palaearctic (Yu et al. 2016), first records for Israel, Italy, Turkey, and Ukraine.	en	Varga, Oleksandr, Di Giovanni, Filippo (2025): Revision of the Western Palaearctic species of Orthocentrus Gravenhorst, 1829 (Hymenoptera, Ichneumonidae, Orthocentrinae): species with ivory / yellow marks on the vertex. Journal of Hymenoptera Research 98: 841-860, DOI: 10.3897/jhr.98.163947
