Karyotype (2n) Genus: species
21=18A+X1X2Y Panstrongylus: megistus
Triatoma: nitida
22=20A+XY Psammolestes: coreodes, tertius
Rhodnius: brethesi, colombiensis, domesticus, ecuadoriensis, milesi, montenegrensis, nasustus, neglectus, neivai, pallescens, pictipes, prolixus, robustus, stali
Dipetalogaster: maximus
Paratriatoma: hirsuta
Triatoma: arthurneivai, baratai, brasiliensis (b. brasiliensis, b. macromelanosoma), carcavalloi, circummaculata, costalimai, delpontei, garciabesi, guasayana, guazu, infestans (i. melanosoma), juazeirensis, jurbergi, klugi, lectularia, lenti, maculata, matogrossensis, melanica, patagonica, petrochiae, platensis, pseudomaculata, rubrovaria, sherlocki, sordida, vandae, williami
23=20A+X1X2Y Belminus: herreri, corredori
Eratyrus: cuspidatus, mucronatus
Meccus: bassolsae, longipennis, mazzottii, pallidipennis, phyllosoma, picturatus
Mepraia: gajardoi, parapatrica, spinolai
Nesotriatoma: bruneri, flavida
Panstrongylus: chinai, geniculatus, howardi, lignarius, rufotuberculatus, tupynambai
Triatoma: barberi, dimidiata (d. capita, d. dimidiata, d. maculipennis), gerstaeckeri, hegneri, mexicana, peninsularis, protracta, rubida, ryckmani, sanguisuga, sinaloensis, tibiamaculata
24=20A+X1X2X3Y Panstrongylus: lutzi
Triatoma: eratyrusiformis, melanocephala, vitticeps
25=22A+X1X2Y Triatoma: rubrofasciata
Table 2: Chromosome number of 86 species of Triatomines with karyotypic analysis. A: autosomes.