identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
AC648792A960B74FFCC9CC776E01D6EA.text	AC648792A960B74FFCC9CC776E01D6EA.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Eusterinx Forster 1869	<div><p>Key to Mexican species of the genus Eusterinx</p><p>1. At least tergites 2 and 3 crossed by deep transverse furrows...................................... 2</p><p>– Metasomal tergites not crossed by transverse furrows......................................... 3</p><p>2. First metasomal segment 2.2 times as long as wide posteriorly, its dorsal carinae distinct; tergites 1–4 longitudinally striate with coarser sculpture on anterior parts of tergites; hind coxa yellowish brown................................. E. inaequalis</p><p>– First metasomal segment slenderer, 3.7 times as long as wide posteriorly, without distinct dorsal carinae; tergites 1–4 entirely coriaceous, without longitudinal striae; hind coxa fuscous......... E. longipes</p><p>3. Fore wing with areolet and dark transverse medi- an and apical bands; flagellum with light medi- an band (Figs 10, 16); epicnemial carina strongly expanded medioventrally into conspicuous lobe; orange-brown species with tricolourous metasoma (Fig. 16); large species: body length 6.6–15.0 mm, fore wing length 4.7–11.0 mm........ E. madorae</p><p>– Fore wing without areolet and dark bands; flagellum without light band; epicnemial carina not modified; generally darker species with metasoma not as above; smaller species: body length at most 3.8 mm, fore wing at most 3.5 mm ...................... 4</p><p>4. Propodeum with long, flattened, apically rounded apophyses (Fig. 18); inner eye orbits convergent towards clypeus.................. E. tenuiventris</p><p>– Propodeum with small sharpened apophyses (as high as diameter of flagellum) or without apophyses; inner eye orbits subparallel...................... 5</p><p>5. Hind tarsal claws and tarsomere 5 enlarged; hind femur inflated, 3.5 times as long as wide; hind coxa and femur predominantly blackish; propodeum with small apophyses (Fig. 17); eyes with short inconspicuous setae..................... E. solida</p><p>– Hind tarsal claws and tarsomere 5 not enlarged; hind femur slenderer, 4.25–5.0 times as long as wide; hind leg pale brown or lighter; propodeum without apophyses; eyes glabrous....................... 6</p><p>6. Notauli deep and long, extending to middle of mesoscutum.................................. 7</p><p>– Notauli weak and short, not reaching middle of mesoscutum.................................. 8</p><p>7. Ovipositor slightly upcurved, 0.4 times as long as hind tibia (Fig. 1); antenna of female with 20–21 flagellomeres, 3–4 apical flagellomeres pale (Fig. 2); metasoma predominantly fuscous, tergites 2–3 with yellowish brown markings (Figs 1, 6)............................... E. apicicornis sp. nov.</p><p>– Ovipositor straight, 0.75–0.8 times as long as hind tibia; antenna of female with 16–20 flagellomeres, apical flagellomeres fuscous; tergites 1–3 predominantly rufous...................... E. australis</p><p>8. Ovipositor strongly upcurved, 0.85–1.0 times as long as hind tibia; antenna of female with 19 flagellomeres; tyloids developed on male flagellomere 6........................ E. americana nom. nov.</p><p>– Ovipositor straight, 1.15–1.25 times as long as hind tibia; antenna of female with 17–18 flagellomeres; tyloids lacking on male flagellomeres................................................ E. townesi</p></div>	https://treatment.plazi.org/id/AC648792A960B74FFCC9CC776E01D6EA	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Humala, A. E.	Humala, A. E. (2025): A review of Mexican species of the genus Eusterinx (Hymenoptera: Ichneumonidae: Orthocentrinae). Zoosystematica Rossica (China) 34 (1): 149-159, DOI: 10.31610/zsr/2025.34.1.149, URL: https://doi.org/10.31610/zsr/2025.34.1.149
AC648792A963B74FFF7FCFD26969D1B4.text	AC648792A963B74FFF7FCFD26969D1B4.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Eusterinx (Divinatrix) inaequalis Rossem 1981	<div><p>Eusterinx (Divinatrix) inaequalis Rossem, 1981</p><p>Distribution. Holarctic species, reported from Mexico by Dasch (1992: 228–229) without noting the exact localities.</p><p>Eusterinx (Divinatrix) longipes Humala et Ruíz-Cancino, 2017</p><p>Type material examined. Holotype. Male, Mexico, Tamaulipas, Municipio Hidalgo, Conrado Castillo, bosque de pino [pine forest], sweeping, 9 Sept. 1995, C. Covarrubias leg. (UAT).</p><p>Distribution. Mexico (Tamaulipas) (Humala</p><p>&amp; Ruíz-Cancino, 2017).</p></div>	https://treatment.plazi.org/id/AC648792A963B74FFF7FCFD26969D1B4	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Humala, A. E.	Humala, A. E. (2025): A review of Mexican species of the genus Eusterinx (Hymenoptera: Ichneumonidae: Orthocentrinae). Zoosystematica Rossica (China) 34 (1): 149-159, DOI: 10.31610/zsr/2025.34.1.149, URL: https://doi.org/10.31610/zsr/2025.34.1.149
AC648792A963B74FFCD8CB006953D56D.text	AC648792A963B74FFCD8CB006953D56D.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Eusterinx (Eusterinx) americana Humala 2025	<div><p>Eusterinx (Eusterinx) americana nom. nov.</p><p>Eusterinx arcuata Dasch, 1992: 193–194 .</p><p>Material examined. Mexico, Tamaulipas, 6 km E of <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-99.7138&amp;materialsCitation.latitude=23.579" title="Search Plazi for locations around (long -99.7138/lat 23.579)">Miquihuana</a>, 23°34′44.4ʺN 99°42′49.68ʺW, 2230 m a.s.l., 24 Sept. 2016, A. Humala leg., 1 male (ZISP) .</p><p>Remarks. The name “ arcuatus ” provided by Dasch (1992) is preoccupied by the name of the fossil species Cremastus (?) arcuatus Cockerell, 1921, transferred to Eusterinx by Khalaim (Antropov et al., 2014: 347). Thus, Eusterinx americana nom. nov. is a new replacement name for the junior homonym E. arcuata Dasch, 1992 .</p><p>As the males of this species are only tentatively associated with the females (Dasch, 1992), the identification of the examined Mexican male specimen (identical to the American ones) is uncertain as well.</p><p>Distribution. Nearctic species: USA (Alberta, British Columbia, South Dakota) and, possibly, * Mexico (Tamaulipas).</p></div>	https://treatment.plazi.org/id/AC648792A963B74FFCD8CB006953D56D	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Humala, A. E.	Humala, A. E. (2025): A review of Mexican species of the genus Eusterinx (Hymenoptera: Ichneumonidae: Orthocentrinae). Zoosystematica Rossica (China) 34 (1): 149-159, DOI: 10.31610/zsr/2025.34.1.149, URL: https://doi.org/10.31610/zsr/2025.34.1.149
AC648792A963B74BFCD8CC066F6CD47F.text	AC648792A963B74BFCD8CC066F6CD47F.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Eusterinx (Eusterinx) apicicornis Humala 2025	<div><p>Eusterinx (Eusterinx) apicicornis sp. nov.</p><p>(Figs 1–9)</p><p>Holotype. Female, Mexico, Tlaxcala, Nanacamilpa, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-98.59637&amp;materialsCitation.latitude=19.459778" title="Search Plazi for locations around (long -98.59637/lat 19.459778)">San Felipe</a> Hidalgo, 19°27ʹ35.2ʺN 98°35ʹ46.9ʺW, 2831 m a.s.l., MT 6, 3 May – 2 June 2016, A. Contreras &amp; Y. Marquez leg. (UNAM).</p><p>Paratypes. Mexico, Tlaxcala: same data as for holotype, 1 female (NHMUK), 6 males (UNAM), 3 males (ZISP); same data but 19°27ʹ22.4ʺN 98°35ʹ39.8ʺW, MT 5, 4 Apr. – 3 May 2016, 1 female (ZISP); Nanacamilpa, Eejido Los Búfalos, 19°28ʹN 98°35ʹW, 2830–2900 m a.s.l., bosque pino-encino [pine–oak forest], MT, 4 Apr. – 3 May 2016, A. Contreras &amp; Y. Marquez leg., 1 male (NHMUK) ; same data but 3 May – 2 June 2016, 2 males (UNAM) .</p><p>Description. Female (Figs 1–6). Body length</p><p>4.1 mm; fore wing length 3.2 mm.</p><p>Head 1.2 times as wide as high in frontal view; face at level of antennal sockets 1.6 times as wide as high, 0.55 times as wide as head. Inner orbits nearly parallel; face reticulate coriaceous, with sparse long setae (Fig. 3). Antenna with 20–21 flagellomeres; first flagellomere about 4.3 times as long as wide; second flagellomere 1.8 times as long as wide; subapical flagellomeres subquadrate (Fig. 2). Occipital carina complete, well-developed; temple comparatively wide, 0.8 times as wide as eye in dorsal view. Ocelli of moderate size; oculo-ocellar line 1.4 times and postocellar line 1.1 times as long as maximum diameter of lateral ocellus (Fig. 5). Anterior tentorial pits large, open. Clypeus twice as wide as high in anterior view, well separated from face by distinct groove, convex near base, otherwise almost flat, its lower edge arched. Malar space 1.8 times as long as basal mandibular width, with subocular sulcus as strip of strigose sculpture (Fig. 3). Mandibles slender, bidentate, strongly twisted inwards; lower tooth small and invisible in frontal view. Clypeus, frons, vertex, and gena polished, with scattered fine setiferous punctures.</p><p>Mesosoma 1.45 times as long as high, subpolished. Mesoscutum polished, with abundant long setae; notauli strongly developed as crenulated furrows, deep and sharp anteriorly, extending to middle of mesoscutum (as in Fig. 9); epomia present; epicnemial carina complete, reaching middle of mesopleuron (Fig. 1). Mesopleuron polished, with sparse setae at upper anterior corner, denser at lower part; metapleuron coriaceous. Sternaulus short but distinct, adjacent to epicnemial carina ventrolaterally. Propodeum coriaceous with all carinae complete; area superomedia hexagonal, well-defined, 1.9 times as long as wide, slightly narrowed posteriorly (Fig. 4). Area basalis strongly transverse, weakly delineated from area superomedia. Dorsal surface of propodeum almost bare, densely setose laterally (Figs 1, 4). Propodeal spiracle round, small.</p><p>Fore wing without areolet; second recurrent vein (2m-cu) with two bullae; nervulus (1cu-a) interstitial (opposite to base of basal vein M&amp;Rs); hind wing with nervellus (Cu&amp;cu-a) reclivous, not intercepted (distal abscissa of Cu absent). Legs slender; hind coxa coriaceous; hind femur 5.1 times as long as wide and 0.75 times as long as hind tibia; hind basitarsus 0.47 times as long as hind tibia; fifth tarsomere as long as second tarsomere. Tarsal claws simple.</p><p>First tergite of metasoma 2.4 times as long as wide posteriorly, arcuate in profile, with distinct dorsal carinae, row of long setae on each lateral side and scattered setiferous punctures; sternite fused with tergite; glymma absent; spiracle at 0.54 times and apex of sternite at 0.57 times of first tergite length. Second tergite 1.1 times as long as wide posteriorly, with distinct round thyridium which adjacent to anterior margin of tergite (Fig. 6). First tergite and anterior half of second tergite coriaceous, remaining tergites subpolished; epipleurae of tergites 2–4 separated by crease. Tergites 2 to 6 with long sparse setae. Ovipositor slightly upcurved, its tip strongly tapered, needle-shaped. Ovipositor sheath 0.4 times as long as hind tibia, with fine setae on lateral margins.</p><p>Coloration. Predominantly black species; clypeus, mandible and tegula brown; scape, pedicel, mouthparts and legs yellow; hind coxa, apical tarsomeres, thyridium, posterior margin of second tergite, anterior half and posterior margin of third tergite light brown; apical 3–4 flagellomeres pale yellowish. Wings hyaline, veins and pterostigma brown.</p><p>Male (Figs 7–9). Similar to female. Antenna with 20–22 flagellomeres; first flagellomere about 3.6 times as long as wide; tyloids not developed, but flagellomeres 9–11 with bare areas devoid of distinct sensilla laterally (Fig. 8). Coloration as in female, excluding predominantly yellowish clypeus and mandible, and fuscous tip of antenna (Fig. 7).</p><p>Comparison. Eusterinx apicicornis sp. nov. can be distinguished from its congeners by the combination of the following characters: inner orbits in female subparallel (Fig. 3); apical flagellomeres in female pale yellowish (Fig. 2); fore wing with areolet lacking (vein 3rs-m absent) and nervulus interstitial (Fig. 1); notauli strong, extending to the middle of mesoscutum (Fig. 9); propodeum with area superomedia elongate, 1.9 times as long as its maximum width (Fig. 4); first tergite slender, 2.4 times as long as wide posteriorly; male flagellomeres without tyloids (Fig. 8).</p><p>From the Nearctic E. georgiana Dasch, 1992, known from a single male from the USA (Georgia), the new species differs in the absence of longitudinal striae on tergites 1 and 2, slenderer hind femur, coriaceous propodeum and the absence of propodeal apophyses. From the Holarctic E. subdola Förster, 1871, it differs in the longer first flagellomere (about 4.3 times as long as wide in E. apicicornis vs. 2.65–3.0times in E. subdola), upcurved ovipositor (straight in E. subdola), longer malar space(Fig. 3) (1.8times as long as basal mandibular width in E. apicicornis sp. nov. vs. 1.25– 1.5 times in E. subdola) and yellow hind coxa (fuscous in E. subdola). From E. australis, the new species differs in the upcurved ovipositor (straight in E. australis), predominantly fuscous metasomal tergites (tergites 1–3 rufous in E. australis), and coriaceous propodeum (polished in E. australis). From E. subtilis Dasch, 1992, known only from females, the new species can be distinguished by its larger size, shorter ovipositor sheath (Fig. 1) (0.4 times as long as hind tibiain E. apicicornis sp. nov. vs. 0.9 times in E. subtilis), flagellum with 20–22 flagellomeres (14–16 flagellomeres in E. subtilis), and notaulus not margined anteriorly by a carina.</p><p>Etymology. The species name is an adjective derived from the Latin words “ apex ” (tip) and “ cornu ” (horn), referring to the pale yellowish apical flagellomeres of the female.</p><p>Distribution. Mexico (Tlaxcala).</p></div>	https://treatment.plazi.org/id/AC648792A963B74BFCD8CC066F6CD47F	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Humala, A. E.	Humala, A. E. (2025): A review of Mexican species of the genus Eusterinx (Hymenoptera: Ichneumonidae: Orthocentrinae). Zoosystematica Rossica (China) 34 (1): 149-159, DOI: 10.31610/zsr/2025.34.1.149, URL: https://doi.org/10.31610/zsr/2025.34.1.149
AC648792A967B745FF7FCD746C97D345.text	AC648792A967B745FF7FCD746C97D345.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Eusterinx (Eusterinx) australis Dasch 1992	<div><p>Eusterinx (Eusterinx) australis Dasch, 1992</p><p>Material examined. Mexico, Tamaulipas, Hidalgo, Conrado Castillo, bosque de pino [pine forest], 9 Sept. 1995, C. Covarrubias leg., 1 female (UAT) .</p><p>Distribution. Nearctic species: USA, Mexico</p><p>(Tamaulipas) (Humala et al., 2011).</p><p>Eusterinx (Eusterinx) madorae Khalaim et Kasparyan in Khalaim et al., 2018</p><p>(Figs 10–16)</p><p>Type material examined. Paratypes. Mexico, Veracruz, San Andrés, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-95.0763&amp;materialsCitation.latitude=18.582056" title="Search Plazi for locations around (long -95.0763/lat 18.582056)">Biological Station</a> Los Tuxtlas, 18°34′55.4ʺN 95°04′34.7ʺW, 207 m a.s.l., selva alta perennifolio [high evergreen rainforest], MT 2, 16. VI – 24.VII.2013, M. Madora leg., 1 female (ZISP) .</p><p>Other material examined. Mexico, Jalisco, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-105.03786&amp;materialsCitation.latitude=19.50485" title="Search Plazi for locations around (long -105.03786/lat 19.50485)">Chamela Biological Station</a>, 19°30′17.46ʺN 105°02′16.296ʺW, 45–135 m a.s.l., 3 Sept. 2009, H. Clebsch &amp; A. Zaldívar leg., 1 male (UNAM) .</p><p>Remarks. Eusterinx madorae was known only from the type series, which included only females. The first description of male is presented below.The female of E. madorae (Fig. 16) has been described in detail, therefore only thedifferences between the two sexes or characters missed in the female description are presented here. It should be noted that this male is almost twice as small as the previously described females (fore wing length 11.0 mm, body length 15.0 mm), its coloration is noticeably lighter, and a number of other characters differ from those of the female. All this is likely attributable to intraspecific variability and sexual dimorphism.</p><p>A large set of distinctive characters does not allow one to assign E. madorae to any of the recognised subgenera of Eusterinx . The solution of this taxonomic problem requires the study of additional Neotropical material and re-evaluation of the subgeneric limits. It will be the subject of my next article on the genus Eusterinx . Thus, for the time being, I leave E. madorae formally in the Eusterinx s. str.</p><p>Description. Male (Figs 10–15). Body length 6.6 mm; fore wing length 4.7 mm.</p><p>Antenna as long as body (Fig. 10), tapered apically, with 24 elongate flagellomeres; first flagellomere about 5.7 times as long as wide; tyloids present on flagellomeres 6–7 (Fig. 13). Eyes less enlarged than in female, face wider (1.5 times as wide as high vs. 1.2 times in female); inner facial orbits nearly parallel; anterior tentorial pits large, open (Fig. 11). Hypostomal carina strongly raised as lamella.</p><p>Mesosoma 1.5 times as long as high; notaulus deeply impressed, smooth and well-bordered, but not joining frontal edge of mesoscutum and scuto-scutellar furrow (Fig. 12). Epicnemial carina complete ventrally, but not expanded medioventrally into conspicuous lobe as in female; sternaulus short and shallow; submetapleural carina moderately strong along its entire length; metapleuron centrally without transverse wrinkles. Propodeum with area basalis short, clearly transverse; area superomedia elongate, 1.8 times as long as wide, slightly narrowed posteriorly; posterior transverse carina almost evenly arched (Fig. 14); propodeal spiracle large, ovoid, connected with pleural carina and longitudinal lateral carina by short transverse keels.</p><p>Fore wing with areolet rhombic, petiolate, narrowed posteriorly; nervulus interstitial (antefurcal in female); postnervulus intercepted in lower third. Legs moderately slender; hind coxa elongate, 1.6 times as long as broad; hind femur 4.5 times as long as wide; hind tarsomere 3 as long as tarsomere 5.</p><p>First tergite 2.5 times as long as wide posteriorly, petiole nearly parallel-sided; posterior margin of first sternite slightly behind spiracle (at 0.57 of tergite length and spiracles at 0.55 of tergite length, vs. 0.63 and 0.54, respectively, in female). Second tergite 0.9 times as long as wide posteriorly (vs. 2.2 times in female).</p><p>Coloration predominantly yellowish orange, generally lighter than in female (Fig. 10); flagellum with flagellomeres 1 to 5 yellow, flagellomeres 6 to 8 pale yellow and remainder dark brown. Tergites 2 and 4–6 brown, tergite 3 predominantly pale yellow (Fig. 15), brown in anterior third. Gonostyle pale yellow. Wings hyaline, infuscation weak; transverse band and tip of fore wing only slightly infuscate; veins and pterostigma brown.</p><p>Distribution. Neotropical species: Mexico (Veracruz, * Jalisco).</p></div>	https://treatment.plazi.org/id/AC648792A967B745FF7FCD746C97D345	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Humala, A. E.	Humala, A. E. (2025): A review of Mexican species of the genus Eusterinx (Hymenoptera: Ichneumonidae: Orthocentrinae). Zoosystematica Rossica (China) 34 (1): 149-159, DOI: 10.31610/zsr/2025.34.1.149, URL: https://doi.org/10.31610/zsr/2025.34.1.149
AC648792A969B745FF7FCA6D6E02D436.text	AC648792A969B745FF7FCA6D6E02D436.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Eusterinx (Eusterinx) townesi Dasch 1992	<div><p>Eusterinx (Eusterinx) townesi Dasch, 1992</p><p>Material examined. Mexico, Tamaulipas: Gómez Farías, Alta Cima, MT, 26 June – 3 July 1999, S. Hernández A. leg., 1 female (UAT); same data but 29 May – 5 June 1999, 1 male (UAT) .</p><p>Distribution. Nearctic species: USA (Arizona,</p><p>Texas), Mexico (Tamaulipas) (Humalaet al., 2011).</p></div>	https://treatment.plazi.org/id/AC648792A969B745FF7FCA6D6E02D436	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Humala, A. E.	Humala, A. E. (2025): A review of Mexican species of the genus Eusterinx (Hymenoptera: Ichneumonidae: Orthocentrinae). Zoosystematica Rossica (China) 34 (1): 149-159, DOI: 10.31610/zsr/2025.34.1.149, URL: https://doi.org/10.31610/zsr/2025.34.1.149
AC648792A969B745FF7FCD8C6969D7E4.text	AC648792A969B745FF7FCD8C6969D7E4.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Eusterinx (Ischyracis) solida Dasch 1992	<div><p>Eusterinx (Ischyracis) solida Dasch, 1992</p><p>(Fig. 17)</p><p>Material examined. Mexico: Tamaulipas: Gómez Farías, Alta Cima, 2 Nov. 1990, E. Ruíz C. leg., 1 male (UAT) ; same locality, MT, 19–26 June 1999, S. Hernández A. leg., 1 female (UAT); same locality, MT, 3–10 July 1999, S. Hernández A. leg., 2 females (UAT, ZISP); Gómez Farías, 12 Oct. 1998, D. R. Kasparyan leg., 1 male (UAT) ; Gómez Farías, La Perra, bosque de pino [pine forest], 24 Oct. 1998, D. R. Kasparyan leg., 2 males (UAT), 1 male (ZISP) ; 8 km N of Ciudad Mante, El Limón, 26 Dec. 1998, D. R. Kasparyan leg., 1 male (ZISP) ; SW of San Carlos, Rincón Murillo, selva baja [lowland rainforest], 21 Oct. 1995, S. Hernández leg., 1 female, 1 male (UAT), 1 female (ZISP) ; Quintana Roo, Vallehermoso, rancho No. 3, 23 July 1993, H. Delfin T.M. leg., 1 male (UAT); Hidalgo, Huasca de Ocampo, rancho Santa Elena, 2480 m a.s.l., MT, 2003, E. Ruíz C. leg., 1 female (UAT) ; Jalisco, Tequila, 7 km to volcano, Bosque de Quercus [oak forest], 1970 m a.s.l., 23 Sept. 2011, E. Ruíz C. leg., 1 male (UAT) ; Morelos: Cuernavaca, UAEM, 1900 m a.s.l., bosque Pinus -yerbas [herbaceous pine forest], 27 Oct. 2011, E. Ruíz C. leg., 1 male (UAT) ; N of <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-99.2648&amp;materialsCitation.latitude=19.019234" title="Search Plazi for locations around (long -99.2648/lat 19.019234)">Cuernavaca</a>, 19°01′09.24ʺN 99°15′53.28ʺW, 2420 m a.s.l., 20 Oct. 2011, A.I. Khalaim leg., 1 female (UAT) ; Tlaxcala, 15 km SSE of Apizaco, N slope of <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-98.03001&amp;materialsCitation.latitude=19.289" title="Search Plazi for locations around (long -98.03001/lat 19.289)">La Malinche Volcano</a>, 19°17′20.4ʺN 98°01′48ʺW, 3000–3040 m a.s.l., 2 Oct. 2016, A. Humala &amp; A.I. Khalaim leg., 1 female, 2 males (ZISP) ; Chiapas, 10 km ESE of San Cristóbal de las <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=-92.55051&amp;materialsCitation.latitude=16.668003" title="Search Plazi for locations around (long -92.55051/lat 16.668003)">Casas</a>, 16°40′04.81ʺN 92°33′01.82ʺW, 2400 m a.s.l., pine forest, 6–7 Aug. 2021, A.I. Khalaim leg., 4 males (ZISP) .</p><p>Remarks. This species was originally described within E. solida species–group (Dasch, 1992), without assignment to any subgenus, and subsequently, formally, the species was included in the catalogues of world Ichneumonidae (Yu &amp; Horstmann, 1997; Yu et al., 2016) in the nominative subgenus Eusterinx . Dasch (1992) noted that this species is related to E. bispinosa Strobl, 1900 belonging to the subgenus Ischyracis, though in E. solida the inner eye orbits are not convergent to the clypeus, the hind femora are inflated and the eyes are setose. Based on morphological studies, I consider this species as occupying an intermediate position between the subgenera Ischyracis and Trestis, because it shares the characters of both subgenera, and I tentatively place this species in the subgenus Ischyracis . However, further research of the Neotropical fauna and possibly the application of molecular techniques are required to clarify the position of E. solida within the genus Eusterinx .</p><p>Distribution. Nearctic and Neotropical species: USA (Arizona), Mexico (Tamaulipas, San Luis Potosí, * Jalisco, * Hidalgo, Estado de México, Guerrero, * Morelos, * Tlaxcala, Puebla, Veracruz, * Chiapas, Quintana Roo), Costa Rica, Argentina. Such a range, covering both North and South America, is possibly a unique case among orthocentrine species. However, the Neotropical fauna is still poorly studied.</p><p>Eusterinx (Ischyracis) tenuiventris Humala et Ruíz-Cancino, 2017</p><p>(Fig. 18)</p><p>Type material examined. Holotype. Male, Mexico, Tamaulipas, Gómez Farías, Alta Cima, MT, 3–10 July 1999, S. Hernández leg. (UAT) . Paratype. Mexico, Tamaulipas, Gómez Farías, 12 Oct. 1998, D. R. Kasparyan leg., 1 male (UAT) .</p><p>Distribution. Mexico (Tamaulipas) (Humala</p><p>&amp; Ruíz-Cancino, 2017).</p></div>	https://treatment.plazi.org/id/AC648792A969B745FF7FCD8C6969D7E4	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Humala, A. E.	Humala, A. E. (2025): A review of Mexican species of the genus Eusterinx (Hymenoptera: Ichneumonidae: Orthocentrinae). Zoosystematica Rossica (China) 34 (1): 149-159, DOI: 10.31610/zsr/2025.34.1.149, URL: https://doi.org/10.31610/zsr/2025.34.1.149
