Anablepsoides katukina, Nielsen & Hoetmer & Vandenkerkhove, 2023

Nielsen, Dalton Tavares Bressane, Hoetmer, Jan Willem & Vandenkerkhove, Eric, 2023, Validation of Anablepsoides katukina Nielsen, Hoetmer & Vandenkerkhove, Anablepsoides falconi Nielsen, Hoetmer & Vandenkerkhove, and Laimosemion anitae Nielsen, Hoetmer & Vandenkerkhove (Cyprinodontiformes: Rivulidae) from western Amazon basin, Acre state, Brazil, Zootaxa 5323 (2), pp. 298-300 : 298-299

Anablepsoides katukina , new species urn:lsid:zoobank.org:act:D58F32C5-799D-4323-9FFF-5DC9C0571479

Holotype. ZUEC 17360 , male, 35.5 mm SL, Brazil, Cruzeiro do Sul, Acre state, stream tributary of Igarapé Canela Fina, rio Juruá basin, 7°30’51.8”S, 72°42’43.2”W; Eric Vandenkerkhove and Jan Willem Hoetmer , 4 Feb 2018.

Paratypes. All from Brazil, Acre state . ZUEC 17361 , 5 males 23.3–33.7 mm SL, 3 females 30.6–33.6 mm SL, 2 c&s, 1 male 37.5 mm SL, 1 female 45.0 mm SL, collected with the holotype . ZUEC 5583 , 5 males 17.7–26.4 mm SL, 8 females 19.7–26.9 mm SL, Cruzeiro do Sul, stream tributary of Igarapé Formoso (tributary of rio Juruá ), c. 7°32’S 72º40’W; C. F. B Haddad & J . R. Santos , 2 Jan 1982 . ZUEC 13043 , 9 males 17.7–24.3 mm SL, 6 females 17.4–27.8 mm SL, 2 c&s, 2 males 26.5–26.6 mm SL, Cruzeiro do Sul, Igarapé Formoso (tributary of rio Juruá ), Bairro Formoso , 7°30’58”S 58’S, 72°41’10”W; Tiago L. Silva & Edson L. Silva, 25 Sept 2016 . ZUEC 13044 , 61 males 15.0– 32.3 mm SL, 32 females, 18.6–27.5 mm SL; same locality as previous ; T. C. Pessali , T. L. Silva & E. L. Silva, 1 Oct 2016 .

Diagnosis. Anablepsoides katukina is distinguished from all remaining species of the A. limoncochae species group by the overall color pattern in males, that present sides of body purplish-blue, with three longitudinal red spots aligned (vs. red lines in A. rubrolineatus , A. iridescens , A. elongatus , A. taeniatus , A. limoncochae , A. urubuiensis , A. parlettei , A. hoetmeri , A. chapare , A. luitalimae , A. bibosi and A. lineasoppilatae , or 4–5 lines formed by small red dots in A. christinae ), two longitudinal rows with 7 minute contact organs, aligned and positioned behind the pectoral fin (vs. two longitudinal rows of 18–20 contact organs in A. hoetmeri , one longitudinal line with 6 minute contact organs, beginning at the level of the trunk and reached by tip of the pectoral fin and ending at the level of the anal fin in A. luitalimae , three longitudinal lines with 10, 8 and 5 minute contact organs, beginning posteriorly to the pectoral fin and ending at level of the middle anal fin in A. chapare , 1–3 contact organ on free margin of each scale of antero-ventral part of the flank in A. urubuiensis ), in males. Additionally, the new species can be distinguished from congeners by the number of caudal-fin rays (23 vs. 24–29), and the insertion of the first pterygiophore of the dorsal fin at the neural spine 15 (vs. 16–24).

Etymology. The specific name honors the Katukina, an indigenous group inhabiting the Rio Juruá.