Isler and Whitney • SPECIES LIMITS IN AN ANTBIRD COMPLEX 
3 
FIG. 1. Geographic ranges of Willisornis populations. Symbols represent the occurrence of taxa within small 
geographic sectors (Isler 1997). Open square = poecilinotus', solid triangle = duidae; open circle = lepidonotus\ solid 
square = gutturalis ; open diamond = gutturalis', solid circle = nigrigula', open triangle = vidua ; star = two subspecies 
occur in sector; U surrounded by a circle = subspecies not identified. Type localities and locations are as mentioned in text. 
(1) “British Guiana” (exact locality unknown; type locality of poecilinotus). (2) Borba, Amazonas, Brazil (04° 24' S, 
59 35' W; type locality of griseiventris). (3) Sarayacu, Pastaza, Ecuador (01° 44' S, IT 29' W; type locality of 
lepidonotus ). (4) Igarape Agu, Para, Brazil (01° 07' S, 47° 37' W; type locality of vidua). (5) Boim, Para, Brazil 
(03° 00' S, 55 27' W; type locality of nigrigula). (6) Cerro Duida, Amazonas, Venezuela (03 25' N, 65° 40' W; type 
locality of duidae). (7) Sao Paulo de Olivenca. Amazonas, Brazil (03' 27' S, 68 48' W; type locality of gutturalis). (8) 
Cano Usate, Amazonas, Venezuela (04 c 25' N, 67° 48' W). (9) Campamento Manaka, Amazonas, Venezuela (03° 57' N, 
67° 05'W). (10) Rio Putaco, Amazonas, Venezuela (02 c 50'N, 64° 25'W). (11) Ocamo, Amazonas, Venezuela 
(02° 48' N, 65 14' W). (12) Demini Camp, Rio Demini, Amazonas, Brazil (00 02' S, 62° 48' W). (13) Sierra de 
Chiribiquete, Caqueta, Colombia (00° 56' N, 72° 42' W). (14) Tonantins, Amazonas, Brazil (02° 47' S, 67° 47' W). (15) 
Divisor; Loreto, Peru (07° 12' S, 73" 53' W). (16) Kiteni, Cuzco Peru (12" 20' S, 72° 50' W). (17) Cordillera de 
Pantiacolla, Madre de Dios, Peru (12 40' S, 71 : 13' W). (18) Santa Cruz, Rio Eiru, Amazonas, Brazil (07° 30' S, 
70 49' W). (19) Eirunepe, Amazonas, Brazil (06' 40' S, 69 52' W). (20) Reserva Uakarai, Amazonas, Brazil (05° 26' S, 
67° 17' W). (21) Carauarf, Amazonas, Brazil (04° 52' S, 66 54' W). (22) Region of the Rio Canuma, Amazonas, Brazil. 
(23) Jacareacanga, Amazonas, Brazil (06 r 27' S, 57° 54' W). (24) Rio Sucunduri near BR 230, Amazonas, Brazil 
(06° 46' S, 59° 07' W). (25) Alta Floresta, left bank Rio Teles Pires (09 c 50' S, 55" 54' W) and Rio Cristalino, right bank 
(09° 36' S, 55° 56' W), Mato Grosso, Brazil. (26) Riozinho, Area Indigena Kayapo, Para, Brazil (~ 08° 00' S, 
52° 00' W). (27) Bosque de Guaipe, Vichada, Colombia (05 c 18' N, 67 57' W). (28) Vicinal Aporui, 12 km north of 
Caracarai, Roraima, Brazil (01° 59' N, 61° 45' W). 
