identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
03C7663D385EFFDE4D87F946FC4FFE90.text	03C7663D385EFFDE4D87F946FC4FFE90.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Augocoris gomesii Burmeister (Scutellerinae 1835	<div><p>Augocoris gomesii Burmeister, 1835</p><p>Figure 2a</p><p>Material examined:   2 specimens (♂) labeled: MEXICO, Oaxaca, Sta. María Chimalapas;  Cerro Azul Reserve, Tropical montane cloud forest. 28-VIII-2022. UV light trap. Leg. Guzmán V, H. M. (1♂)  //  MEXICO, Oaxaca, Cuajinicuil. 20-X-2014. Leg. Ramírez, Y. G. (1♂). New state record .</p><p>Associated plants: No data</p><p>Remarks: Despite being a very colorful shield bug, there is little or no information on its distribution, biology, ecology, hosts and natural enemies. As for its habits, it is only known to be attracted to lights (Torre-Bueno 1914; Eger et al. 2015a; present study). In Mexico it has been recorded in the states of Chiapas, Nayarit and Veracruz (Rodríguez 1992). Here we record for the first time its presence in Oaxaca.</p></div>	https://treatment.plazi.org/id/03C7663D385EFFDE4D87F946FC4FFE90	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.		MagnoliaPress via Plazi	Guzmán-Vásquez, Héctor M.;Martínez-Martínez, Laura	Guzmán-Vásquez, Héctor M., Martínez-Martínez, Laura (2025): Checklist and bilingual key to the genera of Scutelleridae (Hemiptera: Heteroptera) from Mexico, with new distribution records for the state of Oaxaca. Zootaxa 5594 (2): 341-354, DOI: 10.11646/zootaxa.5594.2.6, URL: https://doi.org/10.11646/zootaxa.5594.2.6
03C7663D385DFFDE4D87FB5FFEB0F9F3.text	03C7663D385DFFDE4D87FB5FFEB0F9F3.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Camirus moestus (Stal 1862)	<div><p>Camirus moestus (Stål, 1862)</p><p>Figure 2b</p><p>Material examined:   1 specimen: MEXICO, Oaxaca, San Andrés Huayapam. 14-IX-2020. On flower of  Dahlia pinnata Cav. (1791) . Leg. Martínez M, L. (1♀). New state record and new plant association  .</p><p>Associated plants:  Ambrosia ambrosioides (Cav.) Payne ( Asteraceae),  Gossypium sp. ( Malvaceae) (Rider 2015).</p><p>Remarks: Extremely little is known about the distribution, biology and ecology of this species. Here we report for the first time its association with  Dahlia pinnata Cav and its occurrence in Oaxaca. In Mexico this species has previously been recorded in the states of Hidalgo, Puebla, and San Luis Potosi (supplementary material from Weiler et al. 2017).</p></div>	https://treatment.plazi.org/id/03C7663D385DFFDE4D87FB5FFEB0F9F3	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.		MagnoliaPress via Plazi	Guzmán-Vásquez, Héctor M.;Martínez-Martínez, Laura	Guzmán-Vásquez, Héctor M., Martínez-Martínez, Laura (2025): Checklist and bilingual key to the genera of Scutelleridae (Hemiptera: Heteroptera) from Mexico, with new distribution records for the state of Oaxaca. Zootaxa 5594 (2): 341-354, DOI: 10.11646/zootaxa.5594.2.6, URL: https://doi.org/10.11646/zootaxa.5594.2.6
03C7663D385DFFDF4D87F973FDB9FE41.text	03C7663D385DFFDF4D87F973FDB9FE41.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Orsilochides scurrilis (Stal 1855)	<div><p>Orsilochides scurrilis (Stål, 1855)</p><p>Figure 2c</p><p>Material examined:   6 specimens (4♂ and 2♀). MEXICO, Oaxaca,  Villa de Zaachila; Native grassland. 20-IX-2021. On acahual  Simsia amplexicaulis Pers. Leg. Guzmán V, H. M. (1♀). Same data except 22-VII-2016. (1♂)  //  MEXICO, Oaxaca, San Pedro Tapanatepec. 6-X-2004. On unidentified plant. Leg. Flores, A. S. (1♂, 1♀). Same data except 7-XII-2004. Leg. Coello C, M. M. (1♂) //   MEXICO, Oaxaca, Cuilapam de Guerrero. 12-IX-2006. On  Zea mays . Leg. López M, M. (1♂). New state record and new plant associations  .</p><p>Associated plants:  Ericameria laricifolia (A.Gray) Shinners ( Asteraceae),  Gossypium sp. ( Malvaceae),  Bougainvillea sp. ( Nyctaginaceae),  Saccharum sp. ( Poaceae) (Meeds et al. 2021).</p><p>Remarks: Here we report for the first time the association of  O. scurrilis with  Simsia amplexicaulis (Cav.) Pers ( Asteraceae) and  Zea mays L. ( Poaceae). Little is known about its geographic distribution, biology, life cycles, and immature stages. The data provided here represent the first records for Oaxaca. Brailovsky &amp; Márquez (1974) recorded this species from Cuautla, Morelos and mentioned that records were known from Navojoa, Sonora and Tuxtla Gutiérrez, Chiapas. In addition to these records, in iNaturalist we found observations in the states of Baja California Sur, Colima, Estado de México, Guerrero, Guanajuato, Hidalgo, Jalisco, Michoacán, Nayarit, Quintana Roo, Sinaloa and San Luís Potosí.</p></div>	https://treatment.plazi.org/id/03C7663D385DFFDF4D87F973FDB9FE41	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.		MagnoliaPress via Plazi	Guzmán-Vásquez, Héctor M.;Martínez-Martínez, Laura	Guzmán-Vásquez, Héctor M., Martínez-Martínez, Laura (2025): Checklist and bilingual key to the genera of Scutelleridae (Hemiptera: Heteroptera) from Mexico, with new distribution records for the state of Oaxaca. Zootaxa 5594 (2): 341-354, DOI: 10.11646/zootaxa.5594.2.6, URL: https://doi.org/10.11646/zootaxa.5594.2.6
03C7663D385CFFDF4D87FDBDFA99FC49.text	03C7663D385CFFDF4D87FDBDFA99FC49.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Pachycoris klugii Burmeister 1835	<div><p>Pachycoris klugii Burmeister, 1835</p><p>Figure 2d</p><p>Material examined:   1 specimen labeled: MEXICO, Oaxaca, Ocotlán;  Santiago Apóstol. 24-V-2018. Leg. Padilla C, E. (1♀). New locality record  .</p><p>Associated plants:  Jatropha curcas L.,  Jatropha gossypiifolia L.,  Cnidoscolus multilobus (Pax) I.M. Johnst ( Euphorbiaceae) (Cervantes-Peredo 2002; Rider 2015).</p><p>Remarks: This species is considered to be a pest of  Jatropha curcas in Mexico, Honduras, El Salvador and Nicaragua (Tepole-García 2012; López-Guillén et al. 2016). Little is known about its geographic distribution and hosts. This species is widely distributed in Mexico (Table 1). Cervantes-Peredo (2002) provided records from localities in Oaxaca (Chiltepec, Huajuapan de León, Pluma Hidalgo, Miahuatlán, Portillo del Rayo, Puente Nacional, Oaxaca, Tlacolula, Hierve El Agua, and Tultepec). To these, we add the new locality of Santiago Apóstol.</p></div>	https://treatment.plazi.org/id/03C7663D385CFFDF4D87FDBDFA99FC49	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.		MagnoliaPress via Plazi	Guzmán-Vásquez, Héctor M.;Martínez-Martínez, Laura	Guzmán-Vásquez, Héctor M., Martínez-Martínez, Laura (2025): Checklist and bilingual key to the genera of Scutelleridae (Hemiptera: Heteroptera) from Mexico, with new distribution records for the state of Oaxaca. Zootaxa 5594 (2): 341-354, DOI: 10.11646/zootaxa.5594.2.6, URL: https://doi.org/10.11646/zootaxa.5594.2.6
03C7663D385CFFD04D87FBB5FADCFF74.text	03C7663D385CFFD04D87FBB5FADCFF74.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Sphyrocoris obliquus (Germar 1839) Pachycorinae	<div><p>Sphyrocoris obliquus (Germar, 1839)</p><p>Figure 2e</p><p>Material examined:  5 specimens (3♂ and 2♀) labeled: MEXICO, Oaxaca, Villa de Zaachila; Native grassland. 17- X-2021. Pitfall trap baited with human excrement. Leg. Guzmán V, H. M. &amp; Guzmán V, B. (1♂) //   MEXICO, Oaxaca,  Macuilxóchitl de Artigas Carranza; Xerophytic scrub. 20-VIII-2021. Pitfall trap baited with human excrement. Leg. Guzmán V, H. M. &amp; Guzmán V, B. (1♂), Same data except 18-II-2022 (1♂)  //   MEXICO, Oaxaca, San Andrés Huayapam. 10-X-2020. On leaves of  Rubus fruticosus L. Leg. Martínez M, L. (1♀)  //   MEXICO, Oaxaca, Sta. Cruz Xoxocotlán; CIIDIR. 11-X-2023. On wilted flowers of  Zinnia elegans L. Leg. Martínez M, L. (1♀). New locality records and new plant associations  .</p><p>Associated plants:  Ambrosia chenopodiifolia (Benth.) W.W.Payne,  Bidens bipinnata L.,  Bidens pilosa L.,  Bidens sp.,  Parthenium hysterophorus L.,  Tridax procumbens L. ( Asteraceae);  Varronia cylindrostachya Ruiz &amp; Pav.,  Heliotropium arborescens L. ( Boraginaceae);  Ipomoea sp. ( Convolvulaceae);  Glycine max (L.) Merrill ( Fabaceae);  Salvia mellifera Greene ( Lamiaceae);  Gossypium barbadense L.,  Gossypium thurberi Tod.,  Gossypium sp.,  Sphaeralcea sp. ( Malvaceae);  Zea sp. ( Poaceae);  Simarouba sp. ( Simaroubaceae);  Lantana sp. ( Verbenaceae) (Eger et al. 2015a; Rider 2015; Cazorla &amp; Alarcón 2024).</p><p>Remarks: Eger (2012) and Eger et al. (2015a) mentioned  S. obliquus for Mexico without giving precise localities. Rodriguez (1992) provided records of  S. punctellus (synonymy of  S. obliquus) for several states in Mexico, and mentioned the localities of Huajuapan de León, Panatepec and Pinotepa Nacional in Oaxaca. Therefore, here we add the new localities of Macuilxóchilt de Artigas Carranza, Santa Cruz Xoxocotlán, San Andrés Huayapam, and Villa de Zaachila.</p><p>Also, the association of  S. obliquus with  Rubus fruticosus ( Rosaceae), and  Zinnia elegans ( Asteraceae) is reported for the first time. In addition, three specimens were attracted to beetle traps (Scarabaeinae) baited with human excrement, so it is inferred that  S. obliquus could be a generalist species with both phytophagous and coprophagous habits and possibly even necrophagous since it has also been collected on wilted flowers of  Z. elegans with some initial degree of decomposition. However, observations are needed to corroborate its coprophagy and possible necrophagy. These preferences are quite rare in  Scutelleridae, since coprophagy has only been reported for the species  Solenosthedium liligerum (Thunberg) (Londt &amp; Reavell 1982) . Regarding necrophagy, Chérot et al. (1998), reported  Chrysocoris fascialis (White) feeding on a decomposing snake. Eger et al. (2015b) mentioned that they have collected several New World scutellerids with butterfly traps baited with carrion (decomposing fish).</p></div>	https://treatment.plazi.org/id/03C7663D385CFFD04D87FBB5FADCFF74	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.		MagnoliaPress via Plazi	Guzmán-Vásquez, Héctor M.;Martínez-Martínez, Laura	Guzmán-Vásquez, Héctor M., Martínez-Martínez, Laura (2025): Checklist and bilingual key to the genera of Scutelleridae (Hemiptera: Heteroptera) from Mexico, with new distribution records for the state of Oaxaca. Zootaxa 5594 (2): 341-354, DOI: 10.11646/zootaxa.5594.2.6, URL: https://doi.org/10.11646/zootaxa.5594.2.6
03C7663D3853FFD04D87FEE9FAB0FD24.text	03C7663D3853FFD04D87FEE9FAB0FD24.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Stethaulax marmorata (Say 1832)	<div><p>Stethaulax marmorata (Say, 1831)</p><p>Figure 2f</p><p>Material examined:   1 specimen labeled: MEXICO, Oaxaca,  Santa Cruz Xoxocotlán; CIIDIR. 14-X-2024. Leg. Martínez M, L. (1♂). New state and national record  .</p><p>Associated plants:  Rhus aromatica Aiton,  R. copallinum L.,  R. glabra L. ( Anacardiaceae);  Chamaecyparis sp. ( Cupressaceae) (Tecic &amp; McPherson 2004; Rider 2015)</p><p>Remarks: Little is known about the habits and hosts of this species. Walt &amp; Mcpherson (1973) described the immature stages and provided some notes on their life cycle. In a paper still in progress and not yet published, Eger (pers. comm.) provides a concise summary of plants associated with  S. marmorata in the United States.</p></div>	https://treatment.plazi.org/id/03C7663D3853FFD04D87FEE9FAB0FD24	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.		MagnoliaPress via Plazi	Guzmán-Vásquez, Héctor M.;Martínez-Martínez, Laura	Guzmán-Vásquez, Héctor M., Martínez-Martínez, Laura (2025): Checklist and bilingual key to the genera of Scutelleridae (Hemiptera: Heteroptera) from Mexico, with new distribution records for the state of Oaxaca. Zootaxa 5594 (2): 341-354, DOI: 10.11646/zootaxa.5594.2.6, URL: https://doi.org/10.11646/zootaxa.5594.2.6
03C7663D3853FFD04D87FD59FB04FB2C.text	03C7663D3853FFD04D87FD59FB04FB2C.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Symphylus caribbeanus Kirkaldy 1909	<div><p>Symphylus caribbeanus Kirkaldy, 1909</p><p>Figure 2g</p><p>Material examined:   1 specimen labeled: MEXICO, Oaxaca, Santa María Chimalapa:  Cerro Azul Reserve, Tropical montane cloud forest. 29-VIII-2022. UV light trap. Leg. Guzman V, H. M. (1♂). New state record  .</p><p>Associated plants:  Mangifera indica L.,  Schinus terebinthifolia Raddi ( Anacardiaceae);  Ilex vomitoria Aiton ( Aquifoliaceae);  Clusia major L. ( Clusiaceae);  Phaseolus lathyroides L. ( Fabaceae);  Salvia mellifera Greene ( Lamiaceae);  Myrica cerifera (L.) ( Myricaceae);  Lantana camara L. ( Verbenaceae) (McPherson 1977; Eger et al. 2015a; Rider 2015; Wheeler 2017).</p><p>Remarks: Little is known about the distribution of this species in Mexico or its biology, life cycles and immature stages. It is known that this species is attracted to lights as recorded by McPherson (1977). Here we confirme the phototropism of this species, since the specimen reviewed was captured with a UV light trap.</p></div>	https://treatment.plazi.org/id/03C7663D3853FFD04D87FD59FB04FB2C	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.		MagnoliaPress via Plazi	Guzmán-Vásquez, Héctor M.;Martínez-Martínez, Laura	Guzmán-Vásquez, Héctor M., Martínez-Martínez, Laura (2025): Checklist and bilingual key to the genera of Scutelleridae (Hemiptera: Heteroptera) from Mexico, with new distribution records for the state of Oaxaca. Zootaxa 5594 (2): 341-354, DOI: 10.11646/zootaxa.5594.2.6, URL: https://doi.org/10.11646/zootaxa.5594.2.6
03C7663D3853FFD04D87FB50FEBBF888.text	03C7663D3853FFD04D87FB50FEBBF888.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Tetyra antillarum Kirkaldy. Line 1909	<div><p>Tetyra antillarum Kirkaldy, 1909</p><p>Figure 2h</p><p>Material examined:   7 adult specimens and 1 nymph (3♂ and 5♀) labeled: MEXICO, Oaxaca, Santiago Yosondúa;  Yerbasanta. Sitio El Limón . 3-IX-2019. On  Bursera bipinnata . Leg. Cruz-Osorio, S. J. (1♂), Same data except 4- X-2019 (1♀), Same data except 4-X-2019, Leg. Osorio, F. C. (1 nymph ♂ 5th instar), Same data except 3-XI-2019 (1♂), Same data except 5-X-2019. Leg. Osorio, F. C. (2♀),  //   MEXICO, Oaxaca, Santiago Yosondúa;  Yerbasanta. Sitio Huamil . 4-XI-2019. In  Bursera bipinnata . Leg. Cruz-Osorio, S. J. (1♀), Same data except 5-XII-2019, (1♀). New locality and host plant record  .</p><p>Associated plants:  Schinus terebinthifolia Raddi ( Anacardiaceae),  Bursera simaruba (L.) Sarg. ( Burseraceae) (Wheeler &amp; Eger, 2022).  Bursera bipinnata Engl. ( Burseraceae) (This study).</p><p>Remarks: Very little is known about this species. Wheeler &amp; Eger (2022) provide two records of specimens collected in Sola de Vega and Huitzo, Oaxaca. We also provide a new locality record (Santiago Yosondúa) in Oaxaca and based on the collection of seven adults and a nymph we record  B. bipinnata as a new host record for  T. antillarum .</p></div>	https://treatment.plazi.org/id/03C7663D3853FFD04D87FB50FEBBF888	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.		MagnoliaPress via Plazi	Guzmán-Vásquez, Héctor M.;Martínez-Martínez, Laura	Guzmán-Vásquez, Héctor M., Martínez-Martínez, Laura (2025): Checklist and bilingual key to the genera of Scutelleridae (Hemiptera: Heteroptera) from Mexico, with new distribution records for the state of Oaxaca. Zootaxa 5594 (2): 341-354, DOI: 10.11646/zootaxa.5594.2.6, URL: https://doi.org/10.11646/zootaxa.5594.2.6
03C7663D3853FFD24D87F8F4FA33FCE0.text	03C7663D3853FFD24D87F8F4FA33FCE0.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Scutelleridae Leach 1815	<div><p>Key to separate the adults of the  Scutelleridae genera present in Mexico</p><p>1 Antennae with three segments, abdomen without stridulating areas................ ( Scutellerinae)  Augocoris Burmeister</p><p>- Antennae with five segments, abdomen with stridulating areas....................................Pachychorinae (2)</p><p>2 Semirectangular or semiquadrangular head, dorsally flattened, with concave mandibular plates and elevated anterior and lateral margins...................................................................  Coptochilus Amyot and Serville</p><p>- Head variable in shape, dorsally semi-flattened, convex or slightly convex with anterior and lateral margins not elevated... 3</p><p>3 Distance from metacoxa to ostiole shorter than the distance from ostiole to the lateral margin of metapleura............. 4</p><p>- Distance from the metacoxa to the ostiole greater than or nearly equal to the distance from the ostiole to the lateral margin of the metapleura....................................................................................... 6</p><p>4 Pronotum with a median transverse impression, usually conspicuous; head declivent; punctuation thick and dense, usually with short and decumbent setae.............................................................................. 5</p><p>- Pronotum without transverse impression; head generally straight; punctuation variable, rarely with setae and, if present, then generally long and erect................................................................................ 9</p><p>5 Head strongly declivent; bucculae with distinct lobe anteriorly, lobe strongly truncated posteriorly; coloration black; stridulatory areas not extending to the seventh sternite................................................  Acantholomidea Sailer</p><p>- Head slightly to moderately declivent; bucculae gently rounded, not posteriorly truncated; coloration brown, usually mottled; stridulating areas often extending to the seventh sternite.............................................  Camirus Stål</p><p>6 Dorsum covered with long, thin setae; head shorter than pronotum; antennomeres 4 and 5 distinctly flattened....  Dystus Stål</p><p>- Dorsum generally glabrous or at most with short and decumbent setae; other characters variable....................... 7</p><p>7 Small-sized species (≤ 12 mm); short or underdeveloped ostiolar peritreme......................  Orsilochides Kirkaldy</p><p>- Large species (&gt; 12 mm); no ostiolar peritreme, or if present, then well developed.................................. 8</p><p>8 Anterolateral region of head truncated and oblique; scutellum not as wide as abdomen; distance from ostiole to metacoxa about 1.5 times the distance from ostiole to the lateral margin of metapleura; if less, femora are provided with a black ring or a ring of black maculae.........................................................................  Tetyra Fabricius</p><p>- Anterior region of head rounded; scutellum equal or nearly equal in width to the abdomen; distance from ostiole to metacoxa nearly equal to or slightly greater than the distance from ostiole to the lateral margin of metapleura; femora uniform in color..................................................................................  Pachycoris Burmeister</p><p>9 Ostiolar peritreme occupying less than one-third of the width of the metapleuron or length of the ostiolar peritreme less than half the distance from the ostiole to the lateral margin of the metapleura................................  Tiridates Stal</p><p>- Ostiolar peritreme occupying one-third or more of the width of the metapleuron or length of the ostiolar peritreme greater than half the distance from the ostiole to the lateral margin of the metapleura......................................... 10</p><p>10 Ostiolar peritreme oblique, with the curved apical third gradually expanded and forming an almost right angle.................................................................................................  Sphyrocoris Mayr</p><p>- Ostiolar peritreme deeply or slightly concave, with the apical third curved or slightly curved but in both cases not expanded. .................................................................................................. 11</p><p>11 Ostiolar peritreme cleft and distinctly curved, with raised sides; posterolateral angles of the last abdominal sternites not developed into small spines...............................................................  Homaemus Dallas</p><p>- Ostiolar peritreme curved or slightly curved, but with its sides not elevated; usually with posterolateral angles of at least the last three abdominal sternites developed into small spines........................................................ 12</p><p>12 Elongated ostiolar peritreme almost reaching the anterior margin of the metapleura, with its sides parallel or tapering slightly toward the apex........................................................................  Brailovskylus Eger</p><p>- Elongated ostiolar peritreme but clearly not reaching the anterior margin of the metapleura.......................... 13</p><p>13 Axe-shaped or hammer-shaped parameres....................................................  Symphylus Dallas</p><p>- Hook-shaped parameres................................................................  Stethaulax Bergroth</p><p>Clave para separar a los adultos de los géneros de  Scutelleridae presentes en México</p><p>1 Antenas con tres segmentos, abdomen sin áreas estriduadoras.................... ( Scutellerinae)  Augocoris Burmeister</p><p>- Antenas con cinco segmentos, abdomen con áreas estriduladoras...................................Pachychorinae (2)</p><p>2 Cabeza semirectangular o semicuadrangular, dorsalmente aplanada con placas mandibulares cóncavas con márgenes anteriores y laterales elevados............................................................  Coptochilus Amyot y Serville</p><p>- Cabeza de  forma variable, dorsalmente semiaplanada, convexa o ligeramente convexa con márgenes anteriores y laterales no elevados............................................................................................ 3</p><p>3 Distancia desde la metacoxa al ostiolo más corta que la distancia del ostiolo al margen lateral de la metapleura........... 4</p><p>- Distancia desde la metacoxa al ostiolo más grande o casi igual que la distancia del ostiolo al margen lateral de la metapleura 6</p><p>4 Pronoto con una impresión transversa media, generalmente conspicua; cabeza declivada; puntuación gruesa y densa, generalmente con sedas cortas y decumbentes............................................................... 5</p><p>- Pronoto sin impresión transversa; cabeza generalmente recta; puntuación variable, rara vez con sedas y, si las presenta, entonces generalmente son largas y erectas........................................................................ 9</p><p>5 Cabeza fuertemente declivada; bucculas con lóbulo distintivo anteriormente, lóbulo fuertemente truncado posteriormente; coloración negra; áreas estriduladoras sin extenderse hasta el séptimo esternito..................  Acantholomidea Sailer</p><p>- Cabeza de ligera a moderadamente declivada; bucculas suavemente redondeadas, no truncadas posteriormente; coloración marrón, generalmente moteada; áreas estriduladoras frecuentemente extendidas hasta el séptimo esternito.....  Camirus Stål</p><p>6 Dorso cubierto de sedas largas y delgadas; cabeza más corta que el pronoto; antenómeros 4 y 5 claramente aplanados..................................................................................................  Dystus Stål</p><p>- Dorso generalmente glabro o a lo mucho con sedas cortas y decumbentes; otros caracteres variables................... 7</p><p>7 Especies de talla pequeña (≤ 12 mm); peritrema ostiolar corto o poco desarrollado................  Orsilochides Kirkaldy</p><p>- Especies de talla grande (&gt; 12 mm); sin peritrema ostiolar, o si está presente, entonces está bien desarrollado............. 8</p><p>8 Región anterolateral de la cabeza truncada y oblicua; escutelo no tan ancho como el abdomen; la distancia desde el ostiolo hasta la metacoxa es aproximadamente 1.5 veces la distancia desde el ostiolo hasta el margen lateral de la metapleura; si es menor, los fémures están provistos de un anillo negro o un anillo de máculas negras.........................  Tetyra Fabricius</p><p>- Región anterior de la cabeza redondeada; escutelo igual o casi igual de ancho que el abdomen; distancia desde el ostiolo hasta la metacoxa casi igual o ligeramente mayor que la distancia desde el ostiolo al margen lateral de la metapleura; fémures de color uniforme..........................................................................  Pachycoris Burmeister</p><p>9 Peritrema ostiolar ocupando menos de la tercera parte del metapleurón o longitud del peritrema ostiolar menor a la mitad de la distancia desde el ostiolo al margen lateral de la metapleura..........................................  Tiridates Stal</p><p>- Peritrema ostiolar ocupando la tercera parte o más del metatórax o longitud del peritrema ostiolar mayor que la mitad de la distancia desde el ostiolo al margen lateral de la metapleura................................................... 10</p><p>10 Peritrema ostiolar oblicuo, con el tercio apical curvado gradualmente expandido y formando un ángulo casi recto...............................................................................................  Sphyrocoris Mayr</p><p>- Peritrema ostiolar profundo ligeramente cóncavo, con el tercio apical curvado o ligeramente curvado, pero en ambos casos no expandido.......................................................................................... 11</p><p>11 Peritrema ostiolar hendido y claramente curvado, con sus lados elevados; ángulos posterolaterales de los últimos esternitos abdominales no desarrollados en pequeñas espinas.............................................  Homaemus Dallas</p><p>- Peritrema ostiolar curvado o ligeramente curvado, pero con sus lados no elevados; generalmente con ángulos posterolaterales de al menos los últimos tres esternitos abdominales desarrollados en pequeñas espinas............................. 12</p><p>12 Peritrema ostiolar alargado, que casi alcanza el margen anterior de la metapleura, con sus lados paralelos o estrechándose levemente hacia el ápice.................................................................  Brailovskylus Eger</p><p>- Peritrema ostiolar alargado, pero claramente sin alcanzar el margen anterior de la metapleura........................ 13</p><p>13 Parámeros en forma de hacha o martillo.....................................................  Symphylus Dallas</p><p>- Parámeros en forma de gancho...........................................................  Stethaulax Bergroth</p></div>	https://treatment.plazi.org/id/03C7663D3853FFD24D87F8F4FA33FCE0	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.		MagnoliaPress via Plazi	Guzmán-Vásquez, Héctor M.;Martínez-Martínez, Laura	Guzmán-Vásquez, Héctor M., Martínez-Martínez, Laura (2025): Checklist and bilingual key to the genera of Scutelleridae (Hemiptera: Heteroptera) from Mexico, with new distribution records for the state of Oaxaca. Zootaxa 5594 (2): 341-354, DOI: 10.11646/zootaxa.5594.2.6, URL: https://doi.org/10.11646/zootaxa.5594.2.6
