Alloeorhynchus macer, Brailovsky & Barrera, 2017

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, Zootaxa 4338 (2), pp. 305-318 : 315-316

Alloeorhynchus macer sp. nov.

( Figs. 4 , 19–20 )

Description. Holotype male. Dorsal coloration. Head shiny dark reddish brown, apically paler; antennal segment I yellow, remainder segments embrowned to pale castaneous; anterior lobe of pronotum including the collar shiny yellow; posterior lobe shiny yellow except for black or pale brown semilunar area medially on posterior margin; scutellum dull black; hemelytron shiny throughout; clavus yellow with punctures and apical third castaneous; corium yellow with apical third castaneous; hemelytral membrane pale yellowish brown; connexivum yellow; middle third of connexival segments II–V with group of black spinules resembling an elongate spot; dorsal abdominal segments yellow. Ventral coloration. Head shiny reddish brown; rostral segments, legs, prothorax and abdominal sterna shiny yellow; mesothorax shiny castaneous and metathorax dull castaneous. Structure. Head: Antennal segment II twice or almost twice as long as segment I; rostrum stout, reaching posterior margin of prosternum. 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 three cells. Parameres. Figs. 19–20 .

Female. Color and habitus similar to male holotype.

Measurements. Male. Body length 3.60; head width across eyes 0.60; interocular distance 0.20; antennal segments: I 0.28, II 0.68, III 0.56, IV =ca. 0.71 (curled); pronotum: length of anterior pronotal lobe 0.64, length of posterior pronotal lobe 0.40,maximum width of anterior pronotal lobe 0.69, maximum width of posterior pronotal lobe 1.24; scutellum: length 0.36, width 0.68.

Measurements. Female. Body length 4.52; head width across eyes 0.64; interocular distance 0.25; antennal segments: I 0.37, II 0.68, III 0.62, IV =ca. 0.71 (curled); pronotum: length of anterior pronotal lobe 0.76, length of posterior pronotal lobe 0.46,maximum width of anterior pronotal lobe 0.83, maximum width of posterior pronotal lobe 1.44; scutellum: length 0.48, width 0.80.

Type material. HOLOTYPE male: MEXICO: JALISCO: Estacion de Biologia Chamela , 2-X-1976, H. Brailovsky ( UNAM) . PARATYPES: MEXICO: JALISCO, 1 male, 2 females, Estacion de Biologia Chamela , 7- III-1975, 15-XI-1978, H. Brailovsky ( UNAM) ; 1 female, Estacion de Biologia Chamela, Rio Cuitzmala , 20-III- 1975, H. Brailovsky ( UNAM) . MEXICO: COLIMA, 2 females, Tecoman , 11-II-1983, E. Barrera ( UNAM) . MEXICO: NAYARIT, San Blas , 14-VII-1960, R. B. Loomis & J. Maris ( CASC), 1 female . MEXICO: SINALOA, 26 mi N of Pericos , 13-VIII-1960, P. H. Arnaud Jr., E. S. Ross & D. C. Rentz ( CSASC), 1 female . MEXICO: SONORA, 1 female, La Pintada , 6-XI-1986 ( UNAM) .

Etymology. From the Latin, “ macer ”, lean or thin, referring to the elongate body shape.

Discussion. This new species resembles A. delicatus Harris and A. nigrofasciatus Harris by having the anterior lobe of the pronotal disk shiny yellow and connexival segments II–V yellow with a group of black spinules forming an elongate spot, but in the latter species, the hemelytra in greater part is black to dark brown with the costal margin yellow. In A. delicatus and A. macer sp. nov., the hemelytra in great part are yellow with the apical third of clavus and corium castaneous. Alloeorhynchus delicatus known from Panama, is readily distinguished by having the posterior pronotal lobe shiny reddish brown. In A. macer described from Mexico, the posterior lobe is shiny yellow except for the black or pale brown semilunar area at middle third.

Distribution. Known only from Mexico.

Figures

FIGURES 1 – 10. Dorsal view of Alloeorhynchus spp. 1, A. aureus sp. nov. (female). 2 – 3, A. trimacula (Stein) (males). 4, A. macer sp. nov. (female). 5, A. convolutus sp. nov. (female). 6 – 7, A. nigrofasciatus Harris (6, female, 7, male). 8, A. moritzii (Stein) (female). 9, A. nigrolobus Barber (female). 10, A. vergrandis sp. nov. (male).

FIGURES 11 – 22. Parameres of Alloeorhynchus spp. 11 – 12, A. nigrofasciatus Harris. 13 – 14, A. nigrolobus Barber. 15 – 16, A. aureus sp. nov. 17 – 18, A. trimacula (Stein). 19 – 20, A. macer sp. nov. 21 – 22, A. epigaeus sp. nov.