Alloeorhynchus trimacula Stein
Creators: name: Brailovsky, Harry
name: Barrera, Ernesto
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Nabidae
Alloeorhynchus
Alloeorhynchus trimacula

description: Alloeorhynchus trimacula (Stein)
(Figs. 2–3, 17–18)
Prostemma trimacula Stein, 1860: 76
Redescription. Male. Dorsal coloration. Head shiny black to reddish brown; antennal segment I castaneous brown with basal third yellow, segments II–IV pale castaneous; anterior lobe of pronotum shiny yellowish orange to reddish orange; collar shiny black to reddish brown; posterior lobe of pronotum shiny yellowish orange to reddish orange with three black marks, one at each posterior angle and along lateral edge and a triangular-shaped one at base of midline; scutellum dull black; hemelytra uniformly shiny black or dark brown with basal third of costal border of corium yellow; hemelytral membrane pale brown; connexivum yellow; middle third of connexival segments II–V with group of black spinules resembling an elongate spot; dorsal abdominal segments II–VI pale castaneous brown suffused with yellowish areas, segment VII dark castaneous brown. Ventral coloration. Head and mesothorax shiny black to reddish brown; rostral segments shiny dark to pale castaneous with apical joint yellow; prothorax shiny pale yellowish orange; metathotax dull black; procoxa pale yellow becoming brown to black at apex; mesocoxa and metacoxa yellow; protrochanter pale castaneous, basally yellow; meso.- and metatrochanters yellow; anterior half of each femur yellow and posterior half black to dark brown; tibiae and tarsi pale castaneous; abdominal sterna pale yellow or pale brownish white or creamy yellow with lateral line, genital capsule, adjacent segments and a spot on each pleural margins III–VI black to pale castaneous orange. Structure. Head: Antennal segment II twice or nearly twice as long as segment I; rostrum reaching anterior third of mesosternum. Thorax. Pronotum wider than long; anterior lobe less than twice as long as posterior lobe. Hemelytron macropterous, extending beyond the apex of last abdominal segment; veins of hemelytral membrane distinct forming two cells. Parameres. Figs. 17–18.
Female. Color and habitus similar to male. Connexival segments VIII–IX, dorsal abdominal segments VII–IX and genital plates dark castaneous; dorsal abdominal segments II–VI yellow to pale brown.
Variation. 1, costal margin of corium black to pale yellow. 2, abdominal sterna creamy yellow and at each side with dark brown stripe sometimes tinged with reddish.
Measurements. Male. Body length 4.90; head width across eyes 0.68; interocular distance 0.20; antennal segments: I 0.48, II 0.96, III 0.76, IV =ca. 0.83 (curled); pronotum: length of anterior pronotal lobe 0.80, length of posterior pronotal lobe 0.48,maximum width of anterior pronotal lobe 0.80, maximum width of posterior pronotal lobe 1.44; scutellum: length 0.62, width 0.72.
Measurements. Female. Body length 6.55; head width across eyes 0.76; interocular distance 0.24; antennal segments: I 0.60, II 1.12, III 0.92, IV =ca. 1.20 (curled); pronotum: length of anterior pronotal lobe 0.84, length of posterior pronotal lobe 0.64,maximum width of anterior pronotal lobe 0.96, maximum width of posterior pronotal lobe 1.92; scutellum: length 0.84, width 0.92.
General distribution. Brazil, Guatemala, Mexico, Panama and United States.
Mexican published records. MEXICO: Campeche: Calakmul; Balamku; El Hormiguero. Nayarit: Los Sabinos. Oaxaca: km 55 road Tuxtepec-Oaxaca; km 11 Teotitlan-Huautla; km 14 Mitla-Albarradas. Puebla: km 4 San Jose Acateno-Poza Rica. Queretaro: Puente Escandilla. Tamaulipas: Gomez Farias; Ejido El Azteca; Adolfo Lopez Mateos; El Chamalito (road to Paraiso); km 7 Gomez Farias-Altacima; km 5 Gomez Farias-Ciudad Mante. Veracruz: Ozuluama; km 40 Matatampico-Ozuluama; km 10 Naranjos-Chontla; km 30 San Sebastian-Naranjos; km 14 Misantla-Martinez de la Torre; km 21 Jalcomulco-Huatusco; Actopan; La Mancha; Quiahuiztlan; km 44 Cuitlahuac-Tierra Blanca; San Andres Tuxtla (Los Tuxtlas); km 10 Catemaco-Tebanca; Isla (km 13 Benito Juarez- Villa Juanita); km 45 Isla-Playa Vicente; Jesus Carranza (km 54 Boca del Monte-Poblado Doce); Orizaba (Buena Vista); Atoyac; Montepio (Quetzalan) (Champion 1900, Henry & Brambila 2003, Cervantes 2004).
Material examined. New records. MEXICO: Chiapas, Pueblo Nuevo, Universidad Linda Vista, 1743 m, 17°10’43’’N- 92°54’04’’W, 3-VIII-2012, T. Mejia, L. Cervantes & J. Baez (UNAM) 1 male, collected in Pine Forest. Chiapas, Sierra Morena, 1330 m, 16.15342°N- 93.60078°W, 12-V-2008, Llama Project (UNAM), 4 males.
Chiapas, 2 km SE Coatepec, 1415 m, 17.72099° 95.91510°W, 17-V-2008, Llama Project (UNAM) 1 female. Chiapas, 2 km SE Custepec, 1520 m, 15.72077°N- 92.95081°W, 17-V-2008, J. Longino (UNAM), 1 male, 1 female. Chiapas, Finca Prusia, 10-V-1985, H. Velasco (UNAM), 1 male. Chiapas, Municipio Trinitaria, near Cinco Lagos, 22-II-1994, R. Jones (UNAM), 1 male, 1 female. Guerrero, San Luis Acatlan, km 58 Tlapa-San Luis Acatlan, 2354 m, 17°14’46’’N- 98°37’53’’W, 22-III-2006 (UNAM), 1 male. Guerrero, Iguala, km 3 Iguala- Quetzalapa, 447 m, 16°46’25’’N- 98°29’30’’W, 21-IX-2005, L. Cervantes & R. Carranza (UNAM), 2 males. Guerrero, Atoyac de Alvarez, km 33 Atoyac- El Paraiso, 948 m, 17°17’49’’N- 100°16’06’’W, 19-VII-2005, L. Cervantes, R. Mariño & J. Calonico (UNAM), 1 male. Hidalgo, 15 km E of Tlalchinol, 20°52’94.8’’N- 98°45’72.9’’W, 18-II-1999, (UNAM), 1 female. Nayarit, Compostela, 21-X-1982, M. Garcia (UNAM), 1 female. Oaxaca, 10.8 km SW Valle Nacional, 120 m, 17.68102°N- 96.33026°W, 13-VIII-2 0 0 9, M. G. Branstetter (UNAM), 2 females. Puebla, Pahuatlan, km 2 La Cruz-Tlacuilotepec, 508 m, 20°18’52’’N- 98°02’26’’W, 21-V-2008, H. Brailovsky, E. Barrera & L. Cervantes (UNAM), 1 female, collected on ground below Ficus cotinifolia (Kunth). Puebla, Xicotepec de Juarez, km 6 Xicotepec de Juarez-La Union, 1405 m, 20°17’22’’N- 97°57’37’’W, 22-V-2008, H. Brailovsky, E. Barrera & L. Cervantes (UNAM), 1 male. Puebla, km 4 Pahuatlan-La Cruz, 5-VIII-1995, H. Brailovsky (UNAM), 1 male. Puebla, Cuetzalan, Rancho Pahuatlan, 14.6 km N Cuetzalan, 29-VI-1996, A. Contreras & R. Barba (UNAM), 1 female. Puebla, Pahuatlan, Micro-ondas Monte Llano, 1428 m, 20°18’08’’N- 98°08’12’’W, 21-V-2008, H. Brailovsky, E. Barrera, & L. Cervantes (UNAM), 1 male. Tamaulipas, Ciudad Victoria, km 20 road Ciudad Victoria-Juamave, 1004 m, 23°36’38’’N- 99°12’33’’W, 15-V-2007, H. Brailovsky, E. Barrera & L. Cervantes (UNAM), 1 male; collected in Quercus forest. Veracruz, Las Minas, 12-IX-1996, E. Barrera & H. Brailovsky (UNAM), 1 female. Veracruz, Municipio Tilapan, Arroyo Quetzalan, Los Manantiales, 1160 m, 18°47’42’’N- 97°06’08’’W, 12-V-2000, H. Brailovsky & E. Barrera (UNAM), 1 male. Veracruz, Xalapa, El Castillo, 9-IX-1984, J. Peña (UNAM), 1 male, 1 female.
Biology. This nabid species was found feeding on adults and nymphs of several species of lygaeoid (Antillocorini, Myodochini, and Ozophorini) and was living in leaf litter under several Moraceae species of Ficus trees (Ficus calyculata Miller, F. cotinifolia (Kunth), F. insipida (Willd), F. lapathifolia (Liebm.) Miq.), F. lutea, F. obtusifolia (Kunth), F. pertusa L. f., F. tecolutensis (Liebm.) Miq., and F. trigonata L.). One record mentions this species in Gaura angustifolia (Henry & Brambila 2003, Cervantes 2004).
Discussion. Alloeorhynchus trimacula (Stein) is easily recognized by having the anterior lobe of the pronotum shiny yellowish orange to reddish orange, with the collar shiny black to reddish orange; the posterior lobe of the pronotum is shiny yellowish orange to reddish orange with three black marks, one at each posterior angle and along lateral edge and a triangular-shaped one at base of midline; the connexival segments II–V yellow with a group of black spinules resembling an elongate spot; the clavus and corium are usually uniformly black or with the costal border of corium yellowish; and the femora have the anterior half yellow and the posterior half black to dark brown (Figs. 2–3).
description: Published as part of Brailovsky, Harry & Barrera, Ernesto, 2017, A review of the Mexican species of Alloeorhynchus Fieber (Hemiptera: Heteroptera: Nabidae: Prostemmatinae) with description of six new species, new distributional records, and key to the species, pp. 305-318 in Zootaxa 4338 (2) on pages 314-315, DOI: 10.11646/zootaxa.4338.2.5, http://zenodo.org/record/1036189