A new species of Ambrysus Stål from the Central Mexican Plateau and new state records for species of the genus in the country (Heteroptera: Nepomorpha Naucoridae) Author Reynoso-Velasco, Daniel text Zootaxa 2021 2021-07-27 5005 3 304 316 journal article 10.11646/zootaxa.5005.3.5 1175-5326 5141795 628E1C17-B7D2-4A14-9DD9-7D6D2CF81513 Ambrysus quadracies La Rivers ( Fig. 6 ) Ambrysus quadracies La Rivers 1976 : Biol. Soc. Nev. Occas. Pap., 41: 3–4. Published records . Mexico : Oaxaca , Veracruz ( La Rivers 1976 ; Reynoso-Velasco & Sites 2018a , 2019b ). New state record . Mexico : Chiapas . Distribution . This species had been previously recorded from only two sites in Mexico : Catemaco ( type locality in Veracruz ) and Peña Rubia ( Oaxaca ). Based on the records presented herein, A. quadracies is distributed in southern Mexico lowlands (majority of records below 200 meters) of the states of Chiapas , Oaxaca , and Veracruz ( Fig. 6 ). All records for this species fall within the southern section of the Veracruzan biogeographic province. The northernmost records are located south of the Papaloapan River Basin ( Veracruz ). In the state of Chiapas , numerous specimens of A. quadracies were collected alongside or in the vicinity of the border with Guatemala and in some cases from rivers that originate in that country. One of these localities was Ixcán River (L-1896), a watercourse that originates on the slopes in the northwestern part of the Cuchumatanes mountain range, in the northwestern Guatemalan department of Huehuetenango . Thus, this species clearly also occurs in Guatemala , most probably in the lowlands of the Huehuetenango , Quiché , and Petén departments. Three female specimens of A. quadracies in the CNIN and IEXA had a label indicating they were collected in Cuernavaca, Morelos, which is 300 kilometers northwest of the closest records in northern Oaxaca (L-1880, L-1881). Additionally, these locations are separated by the eastern section of the Sierra Madre del Sur mountain range. Thus, it is doubtful that this species occurs in the state of Morelos; probably, the three female specimens were originally mislabeled. Material examined . CHIAPAS : Mpio. Frontera Comalapa , Río Grijalva at El Caracol , 8 km S of Frontera Comalapa , 15°36’07.0’’N , 92°09’14.5’’W , 677 m , 31-Mar-2015 , L-1897, Reynoso-Velasco , Sites , Shepard & Barr colls. ( 13♂ , 15♀ IEXA ) ; Mpio. Ixtacomitán , Ixtacomitán , Balneario Río Blanco , 17º25’21.8’’N , 93º06’08.6’’W , 106 m , 17-May-2012 , L-1338, Reynoso-Velasco coll. ( 1♂ , 1♀ IEXA ) ; [Mpio. Ixtacomitán], Ixtacomitán , Río Blanco , 10-XII-85, col. F. Arias , L. Cervantes y R. Barba / Colección del Instituto de Biología , UNAM, México , D.F. ( 2♂ , 2♀ CNIN ; 1♂ , 2♀ IEXA ) ; Mpio. Maravilla Tenejapa , Ixcán , Río Ixcán at Pte. Ixcán , 16°04’33.6’’N , 91°04’12.8’’W , 175 m , 30-Mar-2015 , L-1896, Reynoso-Velasco , Sites , Shepard & Barr colls. ( 12♂ , 5♀ CNIN ; 32♂ , 18♀ IEXA ) ; Mpio. Maravilla Tenejapa , 13 de Septiembre , Río Puerto Rico at Pte. Puerto Rico , 16°04’47.9’’N , 91°01’17.4’’W , 163 m , 30-Mar-2015 , L-1895, Reynoso-Velasco Sites , Shepard & Barr colls. ( 2♂ , 2♀ IEXA ) ; Mpio. Ocosingo , Ruta Montes Azules , 30-IV-86, F. Arias / Colección del Instituto de Biología , UNAM, México D.F. ( 1♂ CNIN ; 1♂ IEXA ) ; [ Mpio. Palenque ], Palenque, CL 610, 13-XII-73, J.T. Polhemus ( 1♀ USNM ) ; Mpio. Pichucalco , El Azufre , Pte. Azufre I , 17°33’25.9’’N , 93°00’28.0’’W , 49 m , 26-Mar-2015 , L-1882, Reynoso-Velasco , Sites , Shepard & Barr colls. ( 2♂ , 1♀ IEXA ) ; Mpio. Pichucalco , Río Pichucalco at Pte. Rosita , 4 km S of Pichucalco ( 800 m S of Río de Janeiro ), 17°29’07.2’’N , 93°06’13.5’’W , 44 m , 27-Mar-2015 , L1883, Reynoso-Velasco , Sites , Shepard & Barr colls. ( 6♂ , 4♀ IEXA ) ; Mpio. Solosuchiapa , Solosuchiapa , Río La Sierra , 17º25’40.5’’N , 93º01’35.7’’W , 122 m , 17- May-2012 , L-1339, Reynoso-Velasco coll. ( 2♂ , 2♀ IEXA ; 13♂ , 18♀ UMC ) ; Mpio. Palenque , Ángel Albino Corzo (1a Sección ), Balneario ( Sin Nombre ), Río Chocolja , 17°17’32’’N , 91°37’49.5’’W , 119 m , 29-Mar-2015 , L-1888, Reynoso-Velasco , Sites , Shepard & Barr colls. ( 5♂ , 1♀ CNIN ; 12♂ , 4♀ IEXA ) ; Solaya [Solayó]- Río Laja [Lajas], 13-XII-85, F. Arias , L. Cervantes , R. Barba / Colección del Instituto de Biología , UNAM, México , D.F. ( 2♂ , 1♀ CNIN ; 2♂ , 1♀ IEXA ) . MORELOS : Cuernavaca , 10-V-50 / Colección del Instituto de Biología , UNAM, México D.F. ( 2♀ CNIN ; 1♀ IEXA ) [in doubt] . OAXACA : Mpio. Ayotzintepec , San José Mano Marqués, 17º47’26.2’’N , 96º00’15.3’’W , 66 m , 24-May-2012 , L-1371, Reynoso-Velasco coll. ( 3♂ , 3♀ CNIN ; 5♂ , 10♀ IEXA ; 21♂ , 20♀ UMC ) ; Mpio. Jalapa de Díaz , Arroyo Espuma , 3 km SW of San Felipe , 18°03’44.2’’N , 96°32’49.2’’W , 152 m , 25-Mar-2015 , L-1880, Reynoso-Velasco , Sites , Shepard & Barr colls. ( 4♂ , 1♀ IEXA ) ; Mpio. Jalapa de Díaz , Sto. Domingo , Río Sto. Domingo , 18°02’15.9’’N , 96°32’57.2’’W , 100 m , L-1881, 25-Mar-2015 , L-1881, Reynoso- Velasco , Sites , Shepard & Barr colls. ( 22♂ , 13♀ IEXA ) ; [Mpio. San José Chiltepec], Río Valle Nal. , Peña Rubia , Km 13.1 Rta 175, 100 m , 9-VII-1996 , R. Barba & A. Rojas / Colección del Instituto de Biología , UNAM, México D.F. ( 1♂ , 1♀ CNIN ; 1♀ IEXA ) ; Mpio. San Juan Cotzocón, Arroyo Carrizal at km 110 carr. Palomares-Tuxtepec , 17º26’55.6’’N , 95º26’39.1’’W , 94 m , 22-May-2012 , L-1365, Reynoso-Velasco coll. ( 2♂ , 2♀ IEXA ; 4♂ , 2♀ UMC ) ; Mpio. Santiago Jocotepec , carr. La Alicia-Reforma , ca. 8 km E of Ayotzintepec , 17º40’10.2’’N , 96º04’21’’W , 108 m , 23-May-2012 , L-1370, Reynoso-Velasco coll. ( 1♂ UMC ) ; Mpio. Santiago Jocotepec , La Alicia , 17º38’57.9’’N , 96º00’38.7’’W , 103 m , 23-May-2012 , L-1369, Reynoso-Velasco coll. ( 3♀ UMC ) ; Mpio. Santiago Jocotepec , Río Tesechoacán at Centro Ecoturístico Cerro Chango , 17º42’06.6’’N , 95º54’01.6’’W , 54 m , 23-May-2012 , L-1367, Reynoso-Velasco coll. ( 3♂ , 3♀ IEXA ; 2♂ , 3♀ UMC ) ; Mpio. Santiago Jocotepec , Río Tesechoacán 3.5 km S of San José Río Manso , 17º38’44.3’’N , 95º52’02.1’’W , 61 m , 23-May-2012 , L-1368, Reynoso-Velasco coll. ( 4♂ , 2♀ UMC ) . VERACRUZ : [Mpio. Catemaco], Catemaco , 23-II-60 / Colección del Instituto de Biología , UNAM, México D.F ( 1♂ CNIN ) ; same but 10-VI-64, L. Vázquez / Colección del Instituto de Biología , UNAM, México D.F. ( 1♀ CNIN ) ; [Mpio. Catemaco], Catemaco , 10-VI-64 ( 3♀ CNIN ; 2♀ USNM ) ; same but / Topotype Comp. @ type J.T. Polhemus ‘85 / Ambrysus quadracies Ira La Rivers det. J.T. Polhemus ( 1♀ CNIN ) ; [Mpio. Catemaco], Coyame , Lago Catemaco , 4-V-64, B. Ayala / Colección del Instituto de Biología , UNAM, México D.F. ( 1♀ CNIN ) ; same but 7-II-1965 B. Ayala / Colección del Instituto de Biología , UNAM, México D.F. ( 3♂ , 5♀ UMC ) ; Mpio. Santiago So- chiapan, Río Lana at Pte. Río Lana , 17º32’49.8’’N , 95º34’31.6’’W , 53 m , 23-May-2012 , L-1366, Reynoso-Velasco coll. ( 2♂ , 2♀ IEXA ; 2♂ UMC ) .