Alloeorhynchus nigrolobus Barber 1922
Creators: name: Brailovsky, Harry
name: Barrera, Ernesto
Publisher: name: Zenodo
Year: 2017
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hemiptera
Nabidae
Alloeorhynchus
Alloeorhynchus nigrolobus

description: Alloeorhynchus nigrolobus Barber, 1922: 103.
Redescription. Male. Dorsal coloration. Head shiny dark reddish brown; antennal segment I castaneous, basally yellow, segment II dark castaneous, III–IV pale yellowish castaneous; anterior lobe of pronotum including the collar shiny yellow; posterior lobe shiny reddish brown to black except for shiny yellow concave-shape area medially in anterior margin; scutellum dull black; hemelytron shiny throughout; clavus yellow except claval commissure dark castaneous; corium yellow with apical third dark brown; hemelytral membrane pale yellowish white; connexivum shiny yellow; dorsal abdominal segments pale yellowish brown. Ventral coloration. Head shiny reddish brown; rostral segments, prothorax and legs shiny yellow; mesothorax shiny reddish brown; metathorax dull brown; abdominal sternite II–IV shiny yellow, V–VII shiny pale castaneous with pleural margin shiny yellow and genital capsule shiny pale castaneous. Structure. Head: antennal segment II less than twice as long as segment I; rostrum stout, reaching anterior margin 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; hemelytral membrane without cells. Parameres. Figs. 13–14.
Female. Color and habitus similar to male.
Measurements. Male. Body length 3.32; head width across eyes 0.46; interocular distance 0.17; antennal segments: I 0.31, II 0.60, III 0.46, IV =ca. 0.69 (curled); pronotum: length of anterior pronotal lobe 0.52, length of posterior pronotal lobe 0.31,maximum width of anterior pronotal lobe 0.57, maximum width of posterior pronotal lobe 1.02; scutellum: length 0.37, width 0.49.
Measurements. Female. Body length 3.35; head width across eyes 0.42; interocular distance 0.18; antennal segments: I 0.27, II 0.49, III 0.34, IV =ca. 0.60 (curled); pronotum: length of anterior pronotal lobe 0.49, length of posterior pronotal lobe 0.31,maximum width of anterior pronotal lobe 0.55, maximum width of posterior pronotal lobe 0.93; scutellum: length 0.31, width 0.37.
General distribution. United States: Arizona (Bowie), New Mexico (Lordsburg) and Texas (Brownsville and San Antonio) (Barber 1922, Harris 1928, Henry and Lattin 1988) Material examined. New records. MEXICO: Chihuahua, Urique, Ceyocahui, El Dique, 18-21-VII-2006, L. Delgado (UNAM), 1male. Guerrero, Tixtla, 7-VII- 1979, E. Barrera (UNAM), 1 female. Morelos, Villa de Ayala, Rancho El Polvorin, 25-VI-1977, J. Bueno (UNAM), 1 female. Oaxaca, Pochutla, Piedra Lumbre, 2-VI-1987, L. Cervantes (UNAM), 1 male, 1 female. Oaxaca, Santiago Jamiltepec, El Monroy, 100 m, 10-14-VIII-2005, L. Delgado (UNAM), 1 female. Puebla, 3 mi East Izucar de Matamoros, 25-IV-1962, F. D. Parker & L. A. Stange (UCDC), 1 female. Veracruz, Tlaltetela, Ejido Monte Blanco, 828 m, 19°18’44’’N-96°50’53’’W, 19-II-2009, L. Delgado (UNAM), 1 female.
Discussion. This species resembles A. delicatus Harris in having the anterior lobe of the pronotum shiny yellow, the clavus is shiny yellow with the claval commissure dark castaneous, and the corium is shiny yellow with apical third dark castaneous. In A. delicatus described from Panama, the connexival segments III–VI have a group of black spinules resembling an elongate spot, which is absent in A. nigrolobus described from the United States and here cited from Mexico on which the connexiva are entirely shiny yellow.
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 310-311, DOI: 10.11646/zootaxa.4338.2.5, http://zenodo.org/record/1036189