taxonID	type	description	language	source
AD041A30B62F561AA434D3022736D241.taxon	etymology	Etymology. The species name refers to the pinkie-shaped lobe of the gonostylus (from the Latin, digit - (finger) and - ulus (small, little).	en	Fusari, Lívia Maria, Höcherl, Amelie, Chimeno, Caroline, Baranov, Viktor (2026): A new species and record of Xestochironomus Sublette & Wirth, 1972 (Diptera, Chironomidae) from the Dominican Republic, with males and females associated by DNA barcode. ZooKeys 1266: 219-230, DOI: 10.3897/zookeys.1266.162131
AD041A30B62F561AA434D3022736D241.taxon	diagnosis	Diagnosis. The new species can be distinguished from congeners in having the abdominal tergites III – IV with dark, transverse bands; a long, slender anal point; and the apex of the gonostylus slightly forked, with shallow concavity between the forks and one pinkie-finger-like lobe.	en	Fusari, Lívia Maria, Höcherl, Amelie, Chimeno, Caroline, Baranov, Viktor (2026): A new species and record of Xestochironomus Sublette & Wirth, 1972 (Diptera, Chironomidae) from the Dominican Republic, with males and females associated by DNA barcode. ZooKeys 1266: 219-230, DOI: 10.3897/zookeys.1266.162131
AD041A30B62F561AA434D3022736D241.taxon	description	Description. Male (n = 7, except when stated otherwise). Total length 2.95 – 3.26, 3.13 mm (5). Wing length 1.50 – 1.80, 1.69 mm (6). Total length / wing length 1.71 – 1.98 (5). Wing length / profemur length 1.77 – 1.90 (3). Coloration: head and palp pale brown (Fig. 1 A). Antenna pale brown. Thorax brownish (Fig. 1 B). Halters brown. Wings with faint brownish areas on brachiolum, arculus, and crossvein RM; membrane transparent, slightly brownish along wing margin, from apex of R 4 + 5 to apex of M 1 + 2, and on humerus between Cu and An (Fig. 1 C). Abdominal segments coloration as follows (Fig. 1 D): TI yellowish with dark-brown lateral bands; TII yellowish with dark-brown lateral and posterior bands; TIII – IV yellowish with dark-brown posterior bands; TV – VI yellowish with dark-brown lateral and posterior bands; TVII brown in anterior 2 / 3 with dark-brown, rectangular anteriomedial spot and posterior 1 / 3 of segment yellowish; TVIII yellowish. Legs (Fig. 1 E). Foreleg: femur yellowish with proximal and apical ¼ brown, tibia yellowish with 1 / 3 brown proximally, tarsomere 1 yellowish with brown ring proximally, tarsomere 2 – 4 brownish with proximal and apical ring pale, tarsomere 5 brownish with proximal ring pale. Mid- and hind legs: femur brownish, tibia yellowish with proximally ring brown and proximal 1 / 5 pale brown, all tarsi yellowish. Head. AR 1.2 – 2.0 (4). Temporal setae 9 – 10 (2). Clypeus with 10 – 18 (3) setae. Tentorium 119 – 139 (2) μm long. Palpomere lengths (1 – 5 in μm; n = 4): 23 – 36; 48 – 56; 124 – 145; 119 – 155; 201 – 242. Thorax (n = 5). Acrostichals 12 – 16, 15. Dorsocentrals 15 – 25, 21, partly biserial. Prealars 4 – 6, 5. Scutellum with 8 – 13, 11 setae. Wing. VR = 1.16 – 1.23 (5). Brachiolum with 2 (3) setae. R with 27 – 34 setae; R 1 with 27 – 36 setae; R 4 + 5 with 42 – 49 setae; RM with 6 setae; M with 2 – 3 setae apically. Squama with 7 (2) setae. Legs. Combs of midtibia 17 – 19 (3) μm and 26 – 31 (3) μm long spurs. Combs of hind tibia 21 – 24 (3) μm and 27 – 31 (3) μm long spurs. Width at apex of foretibia 46 – 50 (3) μm, of midtibia 41 – 51 (3) μm, of hind tibia 41 – 54 (3) μm. Lengths (in μm) and proportions of legs in Table 1. Hypopygium (Figs 1 F, 2 A, B). Tergite IX with 14 – 16 strong median setae and 6 – 8 weaker setae along the posterior margin on each side of the anal point, and several fine setae on the ventral side. Anal tergite bands V-shaped, separated. Laterosternite with 2 – 4 setae. Anal point slender, 48 – 59 (4) μm long, 61 – 65 (2) μm long in lateral position (from the base). Phallapodeme 63 – 73 (3) μm long. Transverse sternapodeme curved, 24 – 30 (3) μm long. Gonocoxite 110 – 135, 118 (5) μm long. Superior volsella hooked, 54 – 85, 79 (6) μm long, with 1 strong lateral seta and 1 / 3 basal setae. Inferior volsella 64 – 101, 91 (5) μm long, with 7 – 10 dorsal setae, 75 – 81 (3) μm long apical seta. Gonostylus bifid, 135 – 149, 143 (5) μm long, one pinkie-like lobes with 10 – 20 (4) μm long apical seta. HR 0.74 – 0.92 (5). HV 1.98 – 2.31 (5).	en	Fusari, Lívia Maria, Höcherl, Amelie, Chimeno, Caroline, Baranov, Viktor (2026): A new species and record of Xestochironomus Sublette & Wirth, 1972 (Diptera, Chironomidae) from the Dominican Republic, with males and females associated by DNA barcode. ZooKeys 1266: 219-230, DOI: 10.3897/zookeys.1266.162131
AD041A30B62F561AA434D3022736D241.taxon	description	Description of female (n = 1). Total length 2.78 mm. Wing is bent, no observations possible. Coloration similar to male. Head. Lengths of flagellomeres (μm): 80, 105, 104, 86, 104. Temporals setae 14. Clypeus with 15 setae. Lengths of palpomeres (μm). 34, 48, 136, 142, 249. Thorax. Acrostichals 12; dorsocentrals 29, partly biserial; prealar 6; scutellars 11. Legs. Combs of midtibia 20 μm and 36 μm long spurs. Combs of hind tibia 19 μm and 42 μm long spurs. Width at apex of foretibia 56 μm, of midtibia 50 μm, of hind tibia 57 μm. Lengths (in μm) and proportions of legs in Table 2.	en	Fusari, Lívia Maria, Höcherl, Amelie, Chimeno, Caroline, Baranov, Viktor (2026): A new species and record of Xestochironomus Sublette & Wirth, 1972 (Diptera, Chironomidae) from the Dominican Republic, with males and females associated by DNA barcode. ZooKeys 1266: 219-230, DOI: 10.3897/zookeys.1266.162131
AD041A30B62F561AA434D3022736D241.taxon	distribution	Distribution. Known only from the Dominican Republic.	en	Fusari, Lívia Maria, Höcherl, Amelie, Chimeno, Caroline, Baranov, Viktor (2026): A new species and record of Xestochironomus Sublette & Wirth, 1972 (Diptera, Chironomidae) from the Dominican Republic, with males and females associated by DNA barcode. ZooKeys 1266: 219-230, DOI: 10.3897/zookeys.1266.162131
6AA5CB72A1575BB8827AF22C7E811ED5.taxon	distribution	Distribution. Dominica, but expanded to the Dominican Republic. Barcode of the Dominican Republic Xestochironomus We have conducted BLAST in GenBank. We have also conducted “ Identification ” query with tree-based search in BOLD v. 4. Search queries were conducted for the sequences of the five specimens of two species of Dominican Republic Xestochironomus species. No close matches (> 85 %) were found, with the closest coming from unidentified representatives of Chironomini from South and Central America. We think that the absence of the close matches is caused by the lack the Xestochironomus sequences in the databases (except one from Cranston et al. 2012, but that uses from different primers). In the neighbor-joining tree (Fig. 5), we found that the male and female of X. digitulus sp. nov. grouped with 99.8 % bootstrap support, and that the male and female of X. luteifurcatus grouped at 99.2 % bootstrap support. Genetic distances among the analysed species are shown in Table 5.	en	Fusari, Lívia Maria, Höcherl, Amelie, Chimeno, Caroline, Baranov, Viktor (2026): A new species and record of Xestochironomus Sublette & Wirth, 1972 (Diptera, Chironomidae) from the Dominican Republic, with males and females associated by DNA barcode. ZooKeys 1266: 219-230, DOI: 10.3897/zookeys.1266.162131
