<i>Triatoma jatai</i> sp. nov. in the state of Tocantins, Brazil (Hemiptera: Reduviidae: Triatominae)

Gonçalves, Teresa Cristina Monte; Teves-Neves, Simone Caldas; Santos-Mallet, Jacenir Reis dos; Carbajal-de-la-Fuente, Ana Laura; Lopes, Catarina Macedo

doi:10.1590/S0074-0276108042013006

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Articles • Mem. Inst. Oswaldo Cruz 108 (4) • June 2013 • https://doi.org/10.1590/S0074-0276108042013006 copy

Triatoma jatai sp. nov. in the state of Tocantins, Brazil (Hemiptera: Reduviidae: Triatominae)

Authorship SCIMAGO INSTITUTIONS RANKINGS

Triatoma jatai sp. nov. is the first new species of triatomine to be described in the state of Tocantins, in the northern region of Brazil. It was caught on rock outcrops in the wild environment and, more recently, invading homes. While T. jatai sp. nov. is morphologically similar to Triatoma costalimai, it is distinguished by its general colouring, differences in the blotches on the connexivum, wing size in females and external structures of the male genitalia. The type series has been deposited in the Entomological Collection and Herman Lent Collection, Oswaldo Cruz Institute-Oswaldo Cruz Foundation, Rio de Janeiro, Brazil.

Triatoma; taxonomy; Chagas disease vector; biodiversity; Brazil

Gender	T. jatai sp. nov.					T. costalimai
Variables	Min	Max	X	SD	S²	Min	Max	X	SD	S²
Total length	17.2	28.5	20.15	2.027	4.252	22.5	25.9	24.87	1.162	1.352
Width of abdomen^a	6.3	9.4	8.15	0.698	0.504	8.4	10.7	9.55	0.879	0.772
Length of pronotum	2.3	3.2	2.79	0.208	0.044	3.1	3.5	3.27	0.160	0.025
Width of pronotum	2.3	3.1	2.62	0.260	0.069	2.6	3.2	2.95	0.207	0.042
Length of head	3.9	4.4	4.06	0.145	0.021	4.1	5.1	4.81	0.376	0.141
Width of head	0.8	1.0	0.90	0.047	0.002	1.0	1.1	1.08	0.037	0.001
Synthlipsis	0.8	1.0	0.85	0.056	0.003	0.9	1.1	0.97	0.075	0.005
Width of eyes	0.4	0.5	0.40	0.017	0.000	0.5	0.5	0.50	0.000	0.000
Length of 1st rostral segment	0.8	1.1	0.94	0.080	0.006	1	1.2	1.07	0.075	0.005
Length of 2nd rostral segment	2	3.0	2.54	0.223	0.051	3	3.3	3.14	0.127	0.016
Length of 3rd rostral segment	0.8	1.0	0.92	0.071	0.005	1	1.2	1.08	0.089	0.008

Gender	T.jatai sp. nov.					T. costalimai
Variables	Min	Max	X	SD	S²	Min	Max	X	SD	S²
Total length	16.6	21.9	18.64	1.249	1.561	19.9	22.8	21.47	0.784	0.615
Width of abdomen^a	6.0	7.9	6.94	0.486	0.236	5.6	8.4	6.99	0.834	0.696
Length of pronotum	2.6	3.2	2.88	0.179	0.032	2.2	3.6	3.08	0.303	0.092
Width of pronotum	2.2	3.0	2.55	0.188	0.035	2.5	3	2.77	0.176	0.031
Length of head	3.6	4.2	3.91	0.131	0.017	4.1	4.8	4.51	0.152	0.023
Width of head	0.7	0.9	0.84	0.056	0.003	0.9	1.0	0.96	0.047	0.002
Synthlipsis	0.7	0.8	0.76	0.049	0.002	0.8	1.0	0.87	0.073	0.005
Width of eyes	0.4	0.5	0.40	0.017	0.000	0.4	0.5	0.47	0.043	0.002
Length of 1st rostral segment	0.5	1.0	0.90	0.116	0.013	0.8	1.2	1.00	0.090	0.008
Length of 2nd rostral segment	2.0	2.9	2.45	0.214	0.046	2.7	3.2	2.94	0.124	0.016
Length of 3rd rostral segment	0.7	1.0	0.88	0.077	0.005	0.6	1.0	0.98	0.099	0.010

General aspects	T. jatai sp. n.	T. costalimai
General colour	Brown	Dark brown or black
Rostrum	Second and third rostral segments with short hairs, numerous on third	Second and third rostral segments with numerous long hairs
Hemelytra	Corium with 2+2 ochre spots on basal and apical regions. Males hemelytra attaining or almost attaining apex of seventh urotergite, females attaining basal third or middle of seventh urotergite	Corium with 2+2 red spots on basal and apical regions. Males and female hemelytra attaining apex of seventh urotegite
Connexivum	Connexivum brown with apical clear triangular spot close to the basal intersegmental suture	Connexivum entirely dark brown or black, with orange-red marking of variable width extending along outer connexival border, interrupted by very narrow black bands on intersegmental suture
Tibiae	Spongy fossulae on fore tibiae of male, absent in female	Spongy fossulae on fore and mid tibiae of male, absent in female
Median process of pygophore	Triangular with arcuate base	Y shape with arcuate base
Vesica	Vesica with recesses; 1+1 submedian and one in base; hooked in side view, elongated with flat base and pointed apex in dorsal view	Vesica without recesses, with flat base, curved in side view with rounded apex
Phallosoma	Pentagonal	Ovoid

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[1] + Corresponding author: aniratac@ioc.fiocruz.br