Triatominae

Sandoval-Ruiz, César Antonio, Cervantesperedo, Luis, Mendoza-Palmero, Fredy Severo & Ibáñez-Bernal, Sergio, 2012, The Triatominae (Hemiptera: Heteroptera: Reduviidae) of Veracruz, Mexico: geographic distribution, taxonomic redescriptions, and a key, Zootaxa 3487, pp. 1-23 : 17-18

Key to the Triatominae species of Veracruz

1. Distal margin of the first rostral segment reaching the eye center and longer than the second rostral segment. Scutellum with 1+1 lateral large setiferous subconical horizontal projections; scutellar process lanceolate, depressed, and with a conspicuous dorsal sulcus. Adult body length no more than 10 mm ( Fig. 2 )................................ Belminus costaricensis

- Distal margin of the first rostral segment not reaching the eye center and shorter than or as long as the second rostral segment. Scutellum without lateral large setiferous subconical horizontal projections; scutellar process variable but not lanceolate. Adult body length over 10 mm ................................................................................ 2

2. Antenniferous tubercles inserted close to anterior margin of eyes................................................ 3

- Antenniferous tubercles inserted about the middle of preocular region of head...................................... 4

3. General body coloration light brown or light orange brown, glabrous dorsally. Anterior portion of pronotum with lateral and discal tubercles reduced or obsolescent; posterior margin of pronotum with a black strip; connexival segments with anterior dark spots dorsally; hemelytra light brown or light yellowish brown ( Fig. 6 )................... Panstrongylus geniculatus

- General body coloration dark brown to black, with adpressed golden setae dorsally. Anterior portion of pronotum with the fore lobe tubercles reddish and posterior margin of pronotum with three yellowish spots; connexival segments with dark central spot dorsally; hemelytra pale green ( Fig. 7 )......................................... Panstrogylus rufotuberculatus

4. Posterior process of scutellum short, about one-half as long as main body of scutellum. Adult body length no more than 23 mm ( Fig. 5 )................................................................................. Triatoma barberi

- Process of scutellum elongate, more than one-half the length of main body of scutellum, rounded or like spine apically. Adults body length usually longer than 23mm, rarely under that size................................................... 5

5. Posterior process of scutellum pointed or spine-like. Corium with subapical reddish spot reaching the level of m-cu cross vein. Connexivum dark without spots ( Fig. 3 )..................................................... Eratyrus cuspidatus

- Posterior process of scutellum elongated and rounded apically. Corium with different color pattern. Connexivum with spots orange, yellow or red spots............................................................................. 6

6. Corium with an extensive yellowish white area, narrowly orange at base and black at apex ( Fig. 4 )..... Meccus pallidipennis

- Corium never with yellowish white area, dark with yellow or orange markings..................................... 7

7. Connexival segments dorsally and ventrally with yellow or orange-yellow spot occupying more than posterior third of each segment. Clavus black basally, yellow apically. Corium predominantly yellow or orange-yellow, with apical and central dark - spot, the latter of varied size ( Figs. 10–15 )................................................... Triatoma dimidiata

- Connexival segments dark. Clavus and corium variable in coloration. Corium predominantly dark, with pale spots in different patterns............................................................................................. 8

8. First antennal segment approaching the level of clypeus apex. Pronotum reddish brown or black, with lateral margins and humeral angles pale ( Fig. 9 )................................................................ Triatoma rubida

- First antennal segment elongate, attaining or slightly surpassing the level of clypeus apex. Pronotum uniformly dark....... 9

9. Connexival segments black, narrowly marked with yellow along posterior fourth or third adjacent to intersegmental suture. Corium dark, with base and subapical spot yellowish ( Figs. 16–17 ).............................. Triatoma gerstaeckeri

- Connexival segments black, each one with large yellow spot, remote from anterior but closely approaching posterior border of segment and adjoining connexival suture. Corium with yellow subapical spot situated at apex of cell formed by R and M veins ( Fig. 8 )................................................................................ Triatoma infestans

Figures

FIGURES 2 – 5. Triatomine species known to occur in Veracruz, Mexico: 2) Belminus costaricensis (female from Costa Rica, El Limón, IBUNAM); 3) Eratyrus cuspidatus (male from Veracruz, “ Los Tuxtlas, ” IBUNAM); 4) Meccus pallidipennis (female from Veracruz, “ Los Tuxtlas, ” IBUNAM); 5) Triatoma barberi (female from Mexico, Jalisco, Guadalajara, IBUNAM). Photographs by C. A. Sandoval – Ruiz.

FIGURES 6 – 9. Triatomine species known to occur in Veracruz, Mexico: 6) Panstrongylus geniculatus (female from Venezuela, Carabobo, IBUNAM); 7) Panstrongylus rufotuberculatus (female from Veracruz, “ Los Tuxtlas, ” IBUNAM); 8) Triatoma infestans (female from Veracruz, “ Los Tuxtlas, ” IBUNAM); 9) Triatoma rubida (female from Mexico, Baja California Sur, Isla Ángel de la Guarda, IBUNAM. Photographs by C. A. Sandoval-Ruiz.

FIGURES 10 – 13. Triatoma dimidiata from Veracruz, Mexico: 10) Male from Municipality of Actopan, Rancho San José, IEXA; 11) Female from Municipality of Ixhuatlán de Madero, La Aguada, IEXA; 12) Female from Municipality of Tantoyuca, Palo de Rosa, IEXA; 13) Male from Municipality of Apazapan, Apazapan, IEXA. Photographs by C. A. Sandoval – Ruiz.

FIGURES 14 – 17. Triatomine species known to occur in Veracruz, Mexico: 14 – 15) Triatoma dimidiata; 14) Female from Municipality of Actopan, El Arbolito, IEXA; 15) Female from Municipality of Centla, El Refugio, IEXA; 16 – 17) Triatoma gerstaeckeri; 16) Female from Municipality of Chicontepec, Teponaxtla, IEXA; 17) Female from Municipality of Pánuco, La Angostura, IEXA. Photographs by C. A. Sandoval – Ruiz.